economy PAL/NTSC TV Processors (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah, Philips TDA837x) ECP-mode PARALLEL PORTIBM PC Portable (uses same BIOS as XT) (PORTIBM PC Portable (uses same BIOS as XT) 0678-067A, Intel 82091AA) ECP-mode PARALLEL PORTIBM PC Portable (uses same BIOS as XT) (PORTIBM PC Portable (uses same BIOS as XT) 0778-077A, Intel 82091AA) ECP-mode PARALLEL PORTIBM PC Portable (uses same BIOS as XT) (PORTIBM PC Portable (uses same BIOS as XT) 07BC-07BE, Intel 82091AA) EDIT LINE (INT 50, PCIBM PC Thuis Organizer Shell, AX=000Dh) EDIT LINE IN WINDOW (INT 50, Vanderaart TEXT WINDOWS, AX=0006h) EDIT ON TOP LINE {partially documented} (INT 60, HP 95LX System Manager, DI=0401h) EDOS Device (CALL xxxxh:xxxxh, MS Windows) EEPROM (Xicor X24C01A, etc.) (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. A0h) EGAEnhanced Graphics Adapter(Enhanced Graphics Adapter) IBMInternational Busiuness Machines's second color video board for the IBMInternational Busiuness Machines PCIBM PC family, capable of a maximum resolution of 640x350 pixels in 16 simultaneous colors of a total of 64 possible colors. (2nd adapter) (PORTIBM PC Portable (uses same BIOS as XT) 02C0-02CF) EGA+ GRAPHICS BUFFER (MEM A000h:0000h) EGAEnhanced Graphics Adapter(Enhanced Graphics Adapter) IBMInternational Busiuness Machines's second color video board for the IBMInternational Busiuness Machines PCIBM PC family, capable of a maximum resolution of 640x350 pixels in 16 simultaneous colors of a total of 64 possible colors./VGA+ TEXT BUFFER (MEM B800h:0000h) Eicon Access API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. (3270/5250 gateways) (INT 7B) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 1) (PORTIBM PC Portable (uses same BIOS as XT) 1C80-1C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 2) (PORTIBM PC Portable (uses same BIOS as XT) 2C80-2C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 3) (PORTIBM PC Portable (uses same BIOS as XT) 3C80-3C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 4) (PORTIBM PC Portable (uses same BIOS as XT) 4C80-4C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 5) (PORTIBM PC Portable (uses same BIOS as XT) 5C80-5C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 6) (PORTIBM PC Portable (uses same BIOS as XT) 6C80-6C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 7) (PORTIBM PC Portable (uses same BIOS as XT) 7C80-7C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 8) (PORTIBM PC Portable (uses same BIOS as XT) 8C80-8C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). board product ID (board in slot 9) (PORTIBM PC Portable (uses same BIOS as XT) 9C80-9C83) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). BUS MASTER STATUS (PORTIBM PC Portable (uses same BIOS as XT) 0464-0465) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 1) (PORTIBM PC Portable (uses same BIOS as XT) 1C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 2) (PORTIBM PC Portable (uses same BIOS as XT) 2C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 3) (PORTIBM PC Portable (uses same BIOS as XT) 3C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 4) (PORTIBM PC Portable (uses same BIOS as XT) 4C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 5) (PORTIBM PC Portable (uses same BIOS as XT) 5C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 6) (PORTIBM PC Portable (uses same BIOS as XT) 6C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 7) (PORTIBM PC Portable (uses same BIOS as XT) 7C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 8) (PORTIBM PC Portable (uses same BIOS as XT) 8C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). CONFIGURATION FLAGS (board in slot 9) (PORTIBM PC Portable (uses same BIOS as XT) 9C84) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access control (PORTIBM PC Portable (uses same BIOS as XT) 04D4-04D6) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access Controller (PORTIBM PC Portable (uses same BIOS as XT) 0401-040B) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access count registers (PORTIBM PC Portable (uses same BIOS as XT) 04C6-04CF) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access page registers (PORTIBM PC Portable (uses same BIOS as XT) 0481-048B) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access stop registers (PORTIBM PC Portable (uses same BIOS as XT) 04E0-04FF) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. control (PORTIBM PC Portable (uses same BIOS as XT) 04D0-04D1) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). NMIsee Non-Maskable Interrupt CONTROL (PORTIBM PC Portable (uses same BIOS as XT) 0461-0462) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). PROGRAMMABLE OPTION SELECT (board in slot 1) (PORTIBM PC Portable (uses same BIOS as XT) 1C88-1C8F) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). SETUP CONTROL (board in slot 1) (PORTIBM PC Portable (uses same BIOS as XT) 1C85) EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). system board ID registers (PORTIBM PC Portable (uses same BIOS as XT) 0C80-0C83) EJECT MEDIA (INT 13, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions, AH=46h/AL=00h) EJECT PAGE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 05, PSPS v2.01, AX=454Ah) EMM386.EXE - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, Novell DOS 7, AX=12FFh/BL=06h) EMM386.EXE - CHECK IF MULTITASKING SUPPORT LOADED??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, Novell DOS 7, AX=12FFh/BX=0EDCh) EMM386.EXE - GET ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, Novell DOS 7, AX=2783h) EMPTY BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. KEYBOARD BUFFER (INT 16, AAKEYS, AX=0604h) EMPTY KEY-EVENT BUFFER (INT 16, AAKEYS, AX=0601h) Empty MMX State (OPCODE EMMS) EMPTY WINDOW (INT 50, PCIBM PC Thuis Organizer Shell, AX=000Fh) Emulaser ELSPL.COM - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 1A, AH=E5h) Emulaser ELTSR - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AH=06h) Emulaser ELTSR - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AX=0500h) Emulaser ELTSR - DEACTIVATE??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AX=0503h) Emulaser ELTSR - GET ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AH=0Bh) Emulaser ELTSR - PRINT CAPTURE FILE??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AH=09h) Emulaser ELTSR - SET ??? FILENAME {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AH=0Ah) Emulaser ELTSR - SET ??? FLAG {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AH=0Ch) Emulaser ELTSR - SET ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 17, AX=0502h) EN/DISABLE ACCELERATOR SUPPORT (INT 10, Chips & Technologies Extended BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly., AX=5F53h) EN/DISABLE DEVICE POWER MANAGEMENT (INT 15, Advanced Power Management v1.1+, AX=530Dh) EN/DISABLE REVERSE VIDEO MODE (INT 10, Cirrus Logic BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v3.02, LCD(Liquid Crystal Display) panel, AH=12h/BL=89h) EN/DISABLE STATE SAVE ON INTERRUPTS {protected mode} (INT 21, Phar Lap 386/DOS-Extender VMM, AX=2527h) EN/DISABLE TALL FONT LOADING (INT 10, Chips & Technologies Extended BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly., AX=5F5Eh) ENABLE (INT 14, DimVGA v2.0+, AX=AA07h) ENABLE (INT 1A, RighTime v1.1, AH=F8h) ENABLE (INT 2F, ZyXEL ZFAX v1.x, AX=DA03h) ENABLE (INT 2F, ZyXEL ZFAX v2.x, AX=DB03h) ENABLE A20(Address line 20) The 80286 and higher CPUs allow addresses in real mode to extend slightly beyond the one megabyte mark, which causes an incompatibility with some older programs which expect such addresses to wrap back to the beginning of the address space. For complete compatibility with the 8088, newer machines thus contain circuitry which permits the twenty-first address line (A20) to be disabled. The CPU then effectively has only twenty address lines in real mode, just as the 8088 does, and addresses which would extend beyond the one megabyte mark wrap to the beginning of the address space. See also High Memory Area, Real Mode. GATE (INT 15, SYSTEM, later PSIBM PS/2, any model/2s, AX=2401h) ENABLE AUDITING ON VOLUME (INT 21, Novell NetWare, AX=F258h) ENABLE AUTOMATIC TITLE SWITCH {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, OS/2 v2.0+ Virtual DOS MachineA special type of virtual machine provided by OS/2 version 2.0, in which a copy of MS-DOS or an MS-DOS compatible operating system (or even an incompatible 8086 operating system) is run and appears to have full control of the system. See also Virtual Machine, INT 21h Function 64h., AH=64h/DX=0000h/CX=636Ch/BX=0000h) Enable Black Level Expander (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/7Dh, ITT VDP 3108) ENABLE BROADCAST MESSAGES (INT 21, Novell NetWare, MESSAGE SERVICES, AH=E1h) ENABLE BROADCASTS (INT 21, Novell NetWare, AX=F215h/DX=0000h) ENABLE CACHE (INT 16, PC-Cache v6+, AX=FFA5h/CX=EEEEh) ENABLE CACHE CONTROLLER (INT 16, Compaq Systempro and higher, AX=F401h) ENABLE CACHE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, Super PC-Kwik v5.10+, AH=A4h/SI=4358h) ENABLE CACHE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, CDBLITZ v2.11, AX=1500h/CH=92h/BX=1234h) ENABLE CACHING FOR SPECIFIC DRIVE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, QUICKCACHE II v4.20, AH=32h) ENABLE DELAYED WRITES (INT 16, PC-Cache v6+, AX=FFA5h/CX=AAAAh) ENABLE DESQview EXTENSIONS (INT 15, DESQview v2.00+, AX=DE0Fh) ENABLE DISPLAY UPDATE (INT 2F, Frank Kintrup TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. Utilities, CLOCK, AX=C002h) ENABLE DMAsee Direct Memory Access TRANSLATION (INT 4B, Virtual DMA SpecificationA set of interrupt calls which permit the use of DMA even on systems running in protected or Virtual-86 mode with their address remapping, or systems such as Micro Channel PSIBM PS/2, any model/2s with multiple bus masters independently performing DMA operations., AX=810Ch/DX=0000h) ENABLE DOS-CALL SAFETY NOTIFICATION (INT 21, Software Carousel, AX=DF0Ch) ENABLE DRIVE (INT 21, DOS 5+, AX=5F07h) ENABLE DRIVER {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, NewSpace, AX=4410h/BX=FFFFh) ENABLE EMULATOR (INT 21, Q87, Q387, AX=4321h/BX=0001h) ENABLE EPP (INT 17, EPP BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly., AH=E2h) ENABLE EXPLOSIV {partially documented} (INT 2F, Explosiv v2.x, AX=C05Ah) ENABLE EXTENSIONS (INT 10, VIDEO, UltraVision, AX=CC02h) Enable External RGB(Red-Green-Blue) The color specification mechanism normally used in computer displays, where colors are separated into their primary-color components. See also YUV. (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/71h, ITT VDP 3108) ENABLE FDAK DRIVERS (INT 2F, FreeDOS, FDAK-DDT, AX=12FFh/BL=01h) ENABLE FILE SERVER LOGIN (INT 21, Novell NetWare, AX=F217h/DX=0000h) ENABLE FILE SERVER LOGIN (INT 21, Novell NetWare, FILE SERVER, AH=E3h) ENABLE FUNCTIONS (INT 2F, LAN HiJack, LHR, AX=7AC8h) ENABLE KEYBOARD SERVICE (INT 2F, TopWare Network OS v5.10+, TopTerm, AX=FF11h) ENABLE MACROS {partially documented} (INT 60, HP 95LX System Manager, DI=0F0Bh) ENABLE MEMORY CACHING (INT 16, HP Vectras RS/20C and RS/25C, AX=6F0Fh) ENABLE MOUSE (INT 33, Mouse Systems MOUSE DRIVER v7.01+, AX=004Fh) ENABLE MOUSE DRIVER (INT 33, MS MOUSE v6.0+, AX=0020h) ENABLE MULTITASKING (INT 15, MultiDOS Plus, AH=0Eh) Enable NPX Interrupt (OPCODE FNENI) ENABLE OR DISABLE WATCHDOG PROCESSING (INT 14, FOSSIL(Fido/Opus/Seadog Standard Interface Layer) A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use., AH=14h/AL=01h) Enable Peaking Transient Suppression (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/79h, ITT VDP 3108) ENABLE POPUP (INT 2D, CDTSR, AL=13h) ENABLE PROGRAM {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, SpaceManager, AX=C302h) ENABLE QMR (INT 2F, QMR, AX=C003h) ENABLE RM386 (INT 67, RM386, AX=5DE1h) ENABLE SMOOTH MOUSE (INT 33, Smooth Mouse Driver, PrecisePoint, AX=3001h) ENABLE THE SOFTWARE (INT 11, Blank-It Screen Blanker, AX=0225h/BX=6902h) ENABLE TRANSACTION TRACKING (INT 21, Novell NetWare, AX=F217h/DX=0000h) ENABLE TRANSACTION TRACKING (INT 21, Novell NetWare, FILE SERVER, AH=E3h) ENABLE TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. (INT 2D, FREEVER, AL=14h) ENABLE TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. (INT 2F, SETDRVER.COM v2.10+, AX=E004h) ENABLE VDD TRAPPING OF VIDEO REGISTERS (INT 2F, Windows 3.x, AX=4007h) ENABLE WINDOWS COMPATIBILITY MODE (INT 11, Blank-It Screen Blanker, AX=0225h/BX=6905h) ENABLE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, NORTON UTILITIES 5.0+ TSRs, AX=FE01h/DI=4E55h) ENABLE/DISABLE (INT 10, SCROLOCK.COM, AH=51h) ENABLE/DISABLE (INT 15, SYSTEM, POINTING DEVICE BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. INTERFACE (PSIBM PS/2, any model), AX=C200h) ENABLE/DISABLE (INT 1A, Disk Spool II v4.0x, AH=E0h) ENABLE/DISABLE ANSIPLUS DRIVER (INT 2F, ANSIPLUS v4.00+, AX=1AA6h) ENABLE/DISABLE ANSIPLUS FEATURES (INT 2F, ANSIPLUS v4.00+, AX=1AA7h) ENABLE/DISABLE API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. FUNCTIONS (INT 17, Shamrock Software NET.24 v3.11+, AX=2400h) ENABLE/DISABLE API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. VERB TRACING (INT 68, APPC/PCIBM PC, AH=FDh) ENABLE/DISABLE APPC (INT 68, APPC/PCIBM PC, AH=FAh) ENABLE/DISABLE AUTOBAUD DETECT (INT 7F, Alloy MW386, AH=3Ch) ENABLE/DISABLE BANNER PAGE (INT 17, Alloy MW386, AH=A6h) ENABLE/DISABLE BOLD MODE (INT 10, Cirrus Logic BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v3.02, LCD(Liquid Crystal Display) panel, AH=12h/BL=8Bh) ENABLE/DISABLE BOOTSECTOR READ CHECKING (INT 2F, F-PROT v2.x, VIRSTOP, AX=4653h/CX=0007h) ENABLE/DISABLE CACHE {partially documented} (INT 13, QUICKCACHE II v4.20, AH=22h) ENABLE/DISABLE CHARACTER CONVERSION (INT 17, AX (Japanese ATIBM PC AT) PRINTER, AH=85h) ENABLE/DISABLE CLOSE COMMAND (INT 2F, Windows95, CLOSE-AWARENESS, AX=168Fh/DH=00h) ENABLE/DISABLE CPSCHED API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 16, PCIBM PC Tools v7+ CPSCHED, AX=FEC6h) ENABLE/DISABLE CYLINDER FLUSH FOR DRIVE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, QUICKCACHE II v4.20, AH=3Dh) ENABLE/DISABLE DIRECT SWITCHING (INT 2F, DR DOS 6.0 TaskMAX, AX=2705h) ENABLE/DISABLE DISPLAY (INT 10, VIDEO, Compaq Extensions, AX=BF05h) ENABLE/DISABLE DPMSsee DOS Protected-Mode Services (INT 2F, DOS Protected ModeOne of the operating modes of the 80286 and higher Intel processors, in which addresses used by programs no longer correspond to physical addresses and the CPU enforces various protection mechanisms designed to prevent one program from disrupting other programs or the operating system. See also Real Mode, Virtual-86 Mode. Services (DPMSsee DOS Protected-Mode Services) v1.0, AX=43E2h) ENABLE/DISABLE EVENT SCHEDULER (INT 2F, PC-DOS Econet v1.05, AX=C508h) ENABLE/DISABLE EXPAND MODE (INT 10, Cirrus Logic BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v3.02, LCD(Liquid Crystal Display) panel, AH=12h/BL=8Fh) ENABLE/DISABLE EXPLOSIV (INT 2F, Explosiv v3.0+, AX=C056h) ENABLE/DISABLE FLOW CONTROL (INT 14, FOSSIL(Fido/Opus/Seadog Standard Interface Layer) A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use., AH=0Fh) ENABLE/DISABLE FORM FEED (INT 17, Alloy MW386, AH=A4h) ENABLE/DISABLE HOTKEYS (INT B3, ZIPKEY, AH=7Fh) ENABLE/DISABLE LIGHT SLEEP (INT 15, HP 95LX, AH=4Eh) Enable/Disable Luma Input-16 (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/2Ah, ITT VDP 3108) ENABLE/DISABLE MEMORY (INT 14, Digiboard, AH=15h) ENABLE/DISABLE MEMORY WRITE PROTECTION (INT 67, Nanosoft MD386, AX=5E03h) ENABLE/DISABLE MESSAGE TRACING (INT 68, APPC/PCIBM PC, AH=FCh) ENABLE/DISABLE MUD FILE CHECKING (INT 7F, Alloy NTNX, AH=09h) ENABLE/DISABLE OS FUNCTION SET FUNCTIONS (INT 67, LIM EMSsee Expanded Memory Specification 4.0, AH=5Dh) ENABLE/DISABLE POWER MANAGEMENT (INT 15, Advanced Power Management v1.0+, AX=5308h) ENABLE/DISABLE PROCESSOR FUNCTIONS (INT 15, SYSTEM, AH=C8h) ENABLE/DISABLE RESUME ON RING (INT 15, Advanced Power Management v1.2, AX=5312h) ENABLE/DISABLE STEREOSCOPIC MODE (INT 10, VESA(Video Electronics Standards Association) An industry group which sets both hardware and software standards and recommendations. The term VESA is also used to denote compliance with the VESA SuperVGA BIOS Extensions, a standard set of video BIOS functions for accessing video modes of higher resolution than those defined by IBMInternational Busiuness Machines. SuperVGA BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v3.0+, AX=4F07h) ENABLE/DISABLE SYSTEM STATUS LINE (INT 61, Atari Portfolio, AH=2Eh) ENABLE/DISABLE TIMER-BASED REQUESTS (INT 15, Advanced Power Management v1.2, AX=5313h) ENABLE/DISABLE TopTerm SERVICE (INT 21, TopWare Network OS v5.10+, AX=FF9Fh) ENABLE/DISABLE WATCHDOG TIMEOUT (PS50+IBM PS/2 Models 50,60,70,80) (INT 15, SYSTEM, AH=C3h) ENABLE/SUSPEND ANARKEY {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, ANARKEY.COM v3+, AX=E305h) ENABLE/TRAP EVENT (INT 15, HUNTER 16, AH=6Eh) ENCODER CONTROL REGISTER (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 18h/01h, Raytheon TMC2361) Encrypted Password (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 38h-3Dh, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) END ACCESS TO SPECIFIC PACKET TYPE (INT 21, TopWare Network OS v5.10+, AX=FFE3h/DL=01h) END ACTIVE SESSION (INT 61, Banyan VINES, ASYNC TERMINAL EMULATION, AX=0003h) END BACKGROUND PRINTING {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2A, PRINT, AX=8701h) END BACKGROUND RECEIVE VIDEO DATA (INT 2F, TopWare Network OS v5.10+, AX=FF15h) END CHARACTER-ORIENTED TRANSMIT (INT 17, Shamrock Software NET.24 v3.11+, AX=240Ch) END CRITICAL SECTION (INT 2F, MS Windows 3+, AX=1682h) END CRITICAL SECTION (INT 62, BW-TCP, HW DRIVER (ETHDEV.SYS), AH=0Fh) END DOS CRITICAL SECTION {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2A, NETWORK, AH=81h) END DOS CRITICAL SECTIONS 0 THROUGH 7 {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2A, NETWORK, AH=82h) END DRIVER (INT 2F, MDEBUG command driver, AX=D112h) END LOGICAL FILE LOCKING {obsolete} (INT 21, Novell NetWare, AH=C9h) END LPTAbbreviation for Line PrinTer. CAPTURE (INT 21, Novell NetWare, PRINT SERVICES, AH=DFh/DL=01h) End of Horizontal Blanking (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/16h, ITT VDP 3108) End of Horizontal Blanking (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/57h, ITT VDP 31xxB) END OF INTERRUPT REGISTER (EOI(End of Interrupt) A particular command sent to the interrupt controller to indicate that the interrupt has been handled by software and that new interrupts of the same or lower priority may now be signalled by the interrupt controller.) (MEM FEE0h:00A0h, Pentium, LOCAL APIC) END OF JOB (INT 21, Novell NetWare, WORKSTATION, AH=D6h) END OF SEGMENT DISCARD {callout or callback, protected mode, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 41, MS Windows debugging kernel, AX=0061h) END OF SEGMENT LOAD {callout or callback, protected mode, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 41, MS Windows debugging kernel, AX=0060h) END PLOT {real mode} (INT 7B, AutoCAD Device Interface, PRINTER/PLOTTER, AX=8002h) END POPUP-WINDOW MODE (INT 2F, QRIP/TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination., AX=AC13h/DI=1092h) END SERVER CRITICAL SECTION {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2A, Novell NetWare Lite, CLIENT, AX=D851h) END SPECIFIC LPTAbbreviation for Line PrinTer. CAPTURE (INT 21, Novell NetWare, PRINT SERVICES, AH=DFh/DL=05h) END TRANSACTION (INT 21, Novell NetWare, TRANSACTION TRACKING SYSTEM, AX=C701h) END VIRTUAL MACHINE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, Novell NetWare, VNETWARE.386 API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes., AX=B501h) END ZOOM (INT 61, OPTIMA 1024 VGA-Sync,ET-3000 chipset, AX=0002h) ENGAGE/DISENGAGE POWER MANAGEMENT (INT 15, Advanced Power Management v1.1+, AX=530Fh) ENGINE DISPLAY PITCH (PORTIBM PC Portable (uses same BIOS as XT) 76EE, ATI Mach8/Mach32) ENGINE VIDEO BUFFER OFFSET HIGH (PORTIBM PC Portable (uses same BIOS as XT) 72EE, ATI Mach8/Mach32) ENGINE VIDEO BUFFER OFFSET LOW (PORTIBM PC Portable (uses same BIOS as XT) 6EEE, ATI Mach8/Mach32) ENHANCED 3270 SERVICE (INT 61, Banyan VINES, AX=000Eh) ENHANCED FEATURES (INT 10, VIDEO, ALTERNATE FUNC SELECT (ATI,Tatung,Taxan), AH=12h/BH=55h) ENHANCED INSTALLATION CHECK (INT 2Fh, DR-DOS NLSFUNC 4.01+, AX=1400h/BX=0EDCh) Enhanced Parallel Port (EPP) BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. (CALL xxxxh:xxxxh) ENQUEUE SYSTEM RESOURCE (INT 7F, MultiLink Advanced v1.0+, AH=00h) ENTER CGAColor Graphics Adapter(Color/Graphics Adapter) One of the two video display boards introduced together with the original IBMInternational Busiuness Machines PCIBM PC. See also HGC, MDA. EMULATION MODE (INT 10, VIDEO, Paradise VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AT&TAmerican Telephone and Telegraph VDC600, AX=007Fh/BH=05h) ENTER COLOR VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. MODE (INT 10, VIDEO, Paradise VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AT&TAmerican Telephone and Telegraph VDC600, AX=007Fh/BH=07h) ENTER COMMAND MODE (INT 14, 3com BAPI SERIAL I/O, AH=B1h) ENTER CONSOLE MODE (INT 7F, Non-dedicated NetWare 2.x File Server) Enter key scancode/ASCII code (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 15h-16h, AMSTRAD) ENTER LOGIN AREA (INT 21, Novell NetWare, CONNECTION SERVICES, AH=E3h) ENTER MDA(Monochrome Display Adapter) A text-only video adapter introduced together with the original IBMInternational Busiuness Machines PCIBM PC. See also CGAColor Graphics Adapter, HGC. EMULATION MODE (INT 10, VIDEO, Paradise VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AT&TAmerican Telephone and Telegraph VDC600, AX=007Fh/BH=04h) ENTER MONOCHROME VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. MODE (INT 10, VIDEO, Paradise VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AT&TAmerican Telephone and Telegraph VDC600, AX=007Fh/BH=06h) ENTER SPECIFY MODE (INT 61, OPTIMA 1024 VGA-Sync,ET-3000 chipset, AX=0004h) ENTER STANDBY (INT 15, Compaq SLT/286, AX=4280h) ENTER/EXIT EXTENDED ADDRESSING MODE (INT 26, COMTROL HOSTESS i/ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. DEBUGGER) ENTER/LEAVE NATIVE 386 EXECUTION MODE (INT D4, PC-MOS/386 v3.0+, AH=10h) ENTERING VIDEO DRIVER CRITICAL SECTION (INT 2F, Windows 3.x, AX=4003h) ENUMERATE EXTENDED ATTRIBUTES (INT 21, Novell NetWare, AX=F256h) ENUMERATE OPEN FILES (INT 21, MS-DOS 7.0+, GENERIC IOCTL, AX=440Dh/CX=086Dh) ENUMERATE StreetTalk NAMES (INT 61, Banyan VINES, AX=0007h/BX=0008h) ENUMERATE USERS OF SHARED DEVICE (INT 6F, 10NET v5.0, AX=9504h) ENUMERATE VIDEO MODES (INT 33, MS MOUSE v7.0+, AX=0029h) EPP BASE I/O PORTIBM PC Portable (uses same BIOS as XT) (MEM 0040h:00D2h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v1.00.12.AX1T) EPP-mode PARALLEL PORTIBM PC Portable (uses same BIOS as XT) (PORTIBM PC Portable (uses same BIOS as XT) 0278-027F, Intel 82360SL/82091AA) EPP-mode PARALLEL PORTIBM PC Portable (uses same BIOS as XT) (PORTIBM PC Portable (uses same BIOS as XT) 0378-037F, Intel 82360SL/82091AA) EQUIPMENT BYTE (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 14h, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911.) EQUIPMENT DETERMINATION (INT 4B, Tandy 2000) ERASE FILE (INT 21, Novell NetWare, FILE SERVICES, AX=F244h/DX=0000h) ERROR STATUS REGISTER (MEM FEE0h:0280h, Pentium +, LOCAL APIC) ERROR {callout or callback, protected mode, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 41, MS Windows debugging kernel, AX=0066h) Escape Extrnal Cooprocessors (OPCODE ESC) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. FIXED DISK - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, AH=1Ch) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. FIXED DISK - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, AX=1C0Dh) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. FIXED DISK - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, AX=1C0Fh) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. FIXED DISK - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, AX=1C12h) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. primary harddisk controller (PORTIBM PC Portable (uses same BIOS as XT) 3510-3513) ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. secondary harddisk controller (PORTIBM PC Portable (uses same BIOS as XT) 3518-351B) ESTABLISH SPX CONNECTION (INT 7A, Novell NetWare, SPX Driver, BX=0011h) ET4000/W32 ACL accelerator (MEM BFF0h:0000h) ET4000/W32 CRTC-B/Sprite (PORTIBM PC Portable (uses same BIOS as XT) 217A-217B) European MS-DOS 4.0 - "AEXEC" - EXECUTE PROGRAM IN BACKGROUND (INT 21, AH=80h) European MS-DOS 4.0 - "CREATMEM" - CREATE A SHARED MEMORY AREA (INT 21, AX=8400h) European MS-DOS 4.0 - "CWAIT" - WAIT FOR CHILD TO TERMINATE (INT 21, AH=8Ah) European MS-DOS 4.0 - "FREEZE" - STOP A PROCESS (INT 21, AH=81h) European MS-DOS 4.0 - "GETMEM" - OBTAIN ACCESS TO SHARED MEMORY AREA (INT 21, AX=8401h) European MS-DOS 4.0 - "GETPID" - GET PROCESS IDENTIFIER (INT 21, AH=87h) European MS-DOS 4.0 - "PARTITION" - GET/SET FOREGROUND PARTITION SIZE (INT 21, AH=83h) European MS-DOS 4.0 - "PBLOCK" - BLOCK A PROCESS {partially documented} (INT 21, AH=99h) European MS-DOS 4.0 - "PIPE" - CREATE A NEW PIPE (INT 21, AH=93h) European MS-DOS 4.0 - "PRUN" - UNBLOCK A PROCESS {partially documented} (INT 21, AH=9Ah) European MS-DOS 4.0 - "RELEASEMEM" - FREE SHARED MEMORY AREA (INT 21, AX=8402h) European MS-DOS 4.0 - "RESUME" - RESTART A PROCESS (INT 21, AH=82h) European MS-DOS 4.0 - "SETFILETABLE" - INSTALL NEW FILE HANDLE TABLE (INT 21, AH=86h) European MS-DOS 4.0 - "SETPRI" - GET/SET PROCESS PRIORITY (INT 21, AX=8E00h/BH=00h/DH=00h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=85h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=88h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=8Bh) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=8Fh) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=90h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=91h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=92h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=94h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=96h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=97h) European MS-DOS 4.0 - ??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 21, AH=98h) European MS-DOS 4.0 POPUP - "CheckPu" - INSTALLATION CHECK (INT 2F, AX=1400h) European MS-DOS 4.0 POPUP - "PostPu" - OPEN/CLOSE POPUP SCREEN (INT 2F, AX=1401h) European MS-DOS 4.0 POPUP - "RestorePu" - RESTORE SCREEN (INT 2F, AX=1403h) European MS-DOS 4.0 POPUP - "SavePu" - SAVE POPUP SCREEN (INT 2F, AX=1402h) EVENT COUNTER #0 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0012h, Pentium, Cyrix 6x86MX) EVENT COUNTER #0 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 8000h:0012h, Pentium) EVENT COUNTER #1 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0013h, Pentium, Cyrix 6x86MX) EVENT COUNTER #1 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 8000h:0013h, Pentium) EVENT COUNTER SELECTION AND CONTROL (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0011h, Pentium, Cyrix 6x86MX) EVENT COUNTER SELECTION AND CONTROL (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 8000h:0011h, Pentium) Event Service Layer (CALL xxxxh:xxxxh, Novell Netware) EXAMINE SEMAPHORE (OLD) (INT 21, Novell NetWare, AX=F220h) EXAMINE SEMAPHORE (INT 21, Novell NetWare, AX=F26Fh) EXAMINE SEMAPHORE (INT 21, Novell NetWare, SYNCHRONIZATION SERVICES, AX=C501h) Exchange and addition (OPCODE XADD) EXCHANGE INTERRUPT SUBROUTINES (INT 33, MS MOUSE v3.0+, AX=0014h) EXEC PROGRAM WITH SWAP {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, VEDIT VSWAP, AX=D602h) EXECUTE A MULTIDOS PLUS COMMAND (INT 15, MultiDOS Plus, AH=0Fh) EXECUTE Btrieve OPERATION (INT 2F, Btrieve Multi-User, AX=AB01h) EXECUTE COMMAND (INT 2F, WINX, AX=F203h) EXECUTE COMMAND STRING (INT 17, INSET, AX=CD00h) EXECUTE COMMANDS (INT 21, Brian Antoine Seagate ST-01 SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer. A host adapter connects the SCSI bus to the computer's own bus. See also ESDI, IDE..SYS, IOCTL, AX=4403h) EXECUTE COMMANDS (INT 21, Brian Antoine Seagate ST-01 SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer. A host adapter connects the SCSI bus to the computer's own bus. See also ESDI, IDE..SYS, IOCTL, AX=4405h) EXECUTE COMPILED PROGRAM {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, Borland RTM.EXE 1.0, AX=FB42h/BX=1002h/DX=0014h) EXECUTE DEVICE DRIVER REQUEST {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, DRIVER.SYS support, AX=0802h) EXECUTE DOS COMMAND FROM UNIX (INT E6, Linux DOSEMU, AH=51h) EXECUTE DOS-COMPATIBLE FUNCTIONS {real mode} (INT E0, ConcCP/MConcurrent CP/M by Digital Research, now DR Multiuser DOS,DR Multiuser DOS, CL=71h) EXECUTE FUNCTION (INT 2F, LaserPort Interface, AX=CD0Fh) EXECUTE GENERIC SCSI(Small Computer Systems Interface) A system-independent expansion bus typically used to connect hard disks, tape drives, and CD-ROMs to a computer. A host adapter connects the SCSI bus to the computer's own bus. See also ESDI, IDE. COMMAND (INT 11, WD7000 SDLP interface, AH=FFh/SI=6A6Ah/CX=FFF0h/DH=00h) EXECUTE INSET MENU WITHIN OVERRIDE MODE (INT 17, INSET, AX=CD03h) EXECUTE INTERPRETER COMMAND (INT 2F, MDEBUG command driver, AX=D102h) EXECUTE KEY IN THE INTERPRETER (INT 2F, MDEBUG command driver, AX=D104h) EXECUTE KEY IN THE MONITOR (INT 2F, MDEBUG command driver, AX=D103h/BX=16h) EXECUTE NetBIOSOne of a number of low-level device-independent network interfaces; the other major interfaces are Novell's IPX and the Internet's IP (Internet Protocol, the lower-level portion of TCP/IP). REQUEST (INT 2A, NETWORK, AH=04h) EXECUTE NETBIOS REQUEST,NO ERROR RETRY (INT 2A, NETWORK (Microsoft,LANtastic), AH=01h) EXECUTE PCL838 COMMANDS (INT 2F, PCL-838.EXE, AX=D202h) EXECUTE PROCESS (INT 15, Object Kernel for DOS, AX=3006h) EXECUTE PROGRAM {protected mode} (INT 21, Phar Lap 386/DOS-Extender, AX=25C3h) EXECUTE Soft-ICE COMMAND (INT 03, Soft-ICE, BACK DOOR COMMANDS, AX=0911h/SI=4647h/DI=4A4Dh) EXECUTE UNIX COMMAND (INT E6, Linux DOSEMU, AH=50h) EXECUTE USBsee Universal Serial Bus REQUEST (INT 2F, CATC USB4DOS Host Controller, AX=BB00h/BX=0002h) EXECUTE XMSsee Extended Memory Specification FUNCTION (INT 67, RM386 v6.00+, AH=EFh) EXECUTE ZFAX MAIN MENU (INT 2F, ZyXEL ZFAX v3+, AX=DB10h) EXECUTE {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, DOS 3.3+ internal, INSTALLABLE COMMAND, AX=AE01h/DX=FFFFh/CH=00h) EXHANGE TWO PAGE-TABLE ENTRIES {protected mode} (INT 21, Phar Lap 386/DOS-Extender VMM, AX=251Fh) EXIT EMULATION (INT 61, Banyan VINES, ASYNC TERMINAL EMULATION, AX=0003h) EXIT NOTIFICATION {callout or callback} (INT 15, Omniview Multitasker, AX=5407h) EXITCODE RETRIEVAL NOTIFICATION {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 13, Super PC-Kwik 5.1, AH=A9h/SI=4358h) EXITING VIDEO DRIVER CRITICAL SECTION (INT 2F, Windows 3.x, AX=4004h) EXPAND ERROR INTO STRING {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, DOS 3.0+ CRITICAL ERROR HANDLER, AH=05h) Expansion unit (XTIBM PC XT) (PORTIBM PC Portable (uses same BIOS as XT) 0210-0217) EXPANSION UNIT, RETURN CONFIGURATION NUMBER (INT 15, SYSTEM, later PSIBM PS/2, any model/2s, AX=5101h) EXT MEMORY AND EMS-SUPPORT (PORTIBM PC Portable (uses same BIOS as XT) 0258-0259, ATIBM PC AT RAMBANK Memory Expansion Board) EXTENDED ^C/^K CHECKING AND TRANSMIT ON/OFF (INT 14, FOSSIL(Fido/Opus/Seadog Standard Interface Layer) A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use., AH=10h) EXTENDED ABSOLUTE DISK READ/WRITE (INT 21, Windows95, FAT32, AX=7305h/CX=FFFFh) EXTENDED API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. INSTALLATION CHECK (INT 2D, DTown Utilities v1.40+, AL=10h) EXTENDED ATTRIBUTES {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, IFSFUNC.EXE (DOS 4.x only), AX=112Dh) Extended Batch Language v3.14+ (INT 64) EXTENDED BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - "F17_INQUIRE" - INSTALLATION CHECK (INT 17, HP Vectra, AX=6F00h/BX=0000h) EXTENDED BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. - "F17_PUT_BUFFER" - PRINT BUFFER (INT 17, HP Vectra, AX=6F02h) EXTENDED BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. (INT 61, Atari Portfolio) EXTENDED BREAK CHECKING (INT 21, DOS 2+, AH=33h) EXTENDED CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. CHECKSUM (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 7Ah, AWARD) EXTENDED CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. CHECKSUM (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 7Bh, AWARD) Extended CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. Checksum, High Byte (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 3Eh, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) Extended CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. Checksum, Low Byte (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 3Fh, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) EXTENDED COMMANDS (INT 15, SYSTEM, POINTING DEVICE BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. INTERFACE (PSIBM PS/2, any model), AX=C206h) EXTENDED COMMUNICATION PORTIBM PC Portable (uses same BIOS as XT) CONTROL (CONVERTIBLE,PSIBM PS/2, any model) (INT 14, SERIAL, AH=05h) EXTENDED CONFIGURATION REGISTER 0 (PORTIBM PC Portable (uses same BIOS as XT) 52E8-52E9, C&T 82c480) EXTENDED CONFIGURATION REGISTER 1 (PORTIBM PC Portable (uses same BIOS as XT) 56E8-56E9, C&T 82c480) EXTENDED CONFIGURATION REGISTER 2 (PORTIBM PC Portable (uses same BIOS as XT) 5AE8-5AE9, C&T 82c480) EXTENDED CONFIGURATION REGISTER 3 (PORTIBM PC Portable (uses same BIOS as XT) 5EE8-5EE9, C&T 82c480) EXTENDED CONTROL (INT 14, HUNTER 16, AH=21h) EXTENDED CRT CONTROL REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03D4-03D5, Chips&Technologies VIDEO CHIPS) EXTENDED CRT CONTROL REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03D4-03D5, Cirrus Logic VIDEO CHIPS) EXTENDED CRT CONTROL REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03D4-03D5, S3 VIDEO CHIPS) EXTENDED CRT CONTROL REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03D4-03D5, Tseng Labs VIDEO CHIPS) EXTENDED DATA REGISTER ACCESS (INT 10, VIDEO, Paradise VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AT&TAmerican Telephone and Telegraph VDC600, AX=007Fh) EXTENDED FEATURE ENABLE REGISTER (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. C000h:0080h, AMD K6) EXTENDED FILE ATTRIBUTES (INT 21, Novell NetWare, FILE SERVICES, AH=B6h) EXTENDED GET/SET FILE ATTRIBUTES (INT 21, Windows95, LONG FILENAME, AX=7143h) EXTENDED GRAPHICS ENGINE CONGIFURATION (PORTIBM PC Portable (uses same BIOS as XT) 7AEE, ATI Mach8/Mach32) EXTENDED INITIALIZATION (INT 14, COMM-DRV, AH=81h) EXTENDED INITIALIZE (CONVERTIBLE,PSIBM PS/2, any model) (INT 14, SERIAL, AH=04h) EXTENDED INITIALIZE (INT 14, Microsoft Systems Journal TSRCOMM INT14, AX=0402h) EXTENDED LINE CONTROL INITIALIZATION (INT 14, X00 FOSSIL(Fido/Opus/Seadog Standard Interface Layer) A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use., AH=1Eh) EXTENDED MEDIA CHANGE (INT 13, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions, AH=49h) EXTENDED MEMORY >16M (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 35h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) EXTENDED MEMORY >16M (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 34h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) EXTENDED MEMORY (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 37h, Quadtel HT12 BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. 03.05.03) EXTENDED MEMORY (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 36h, Quadtel HT12 BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. 03.05.03) EXTENDED MEMORY IN KB (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 18h, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911.) EXTENDED MEMORY IN KB (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 31h, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911.) EXTENDED MEMORY IN KB (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 17h, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911.) EXTENDED MEMORY IN KB (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 30h, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911.) EXTENDED MEMORY SIZE IN 64K BLOCKS (high byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 36h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. WinBIOS) EXTENDED MEMORY SIZE IN 64K BLOCKS (low byte) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 35h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. WinBIOS) Extended Memory SpecificationA specification devised by Microsoft which allows multiple programs to share extended (above 1 megabyte) memory and noncontiguous memory above 640K. See also Upper Memory Block. (XMSsee Extended Memory Specification) (CALL xxxxh:xxxxh) EXTENDED MODE SET (INT 10, VIDEO, Everex Micro Enhancer EGAEnhanced Graphics Adapter(Enhanced Graphics Adapter) IBMInternational Busiuness Machines's second color video board for the IBMInternational Busiuness Machines PCIBM PC family, capable of a maximum resolution of 640x350 pixels in 16 simultaneous colors of a total of 64 possible colors./Viewpoint VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., AX=0070h) EXTENDED OPEN/CREATE (INT 21, DOS 4.0+, AX=6C00h) EXTENDED OPEN/CREATE FILE {callout or callback, undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 2F, NETWORK REDIRECTOR (DOS 4.0+), AX=112Eh) EXTENDED PROTOCOL MENU (INT 14, HUNTER 16, AH=2Ah) EXTENDED READ (INT 13, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions, AH=42h) EXTENDED RENAME FILE USING FCBsee File Control Block (INT 21, U, PTS-DOS 6.51 & S/DOS 1.0, AH=18h) EXTENDED SEEK (INT 13, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions, AH=47h) EXTENDED SEQUENCER REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03C4-03C5, Cirrus Logic GRAPHICS) EXTENDED SEQUENCER REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03C4-03C5, NVIDIA) EXTENDED SEQUENCER REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03C4-03C5, S3 GRAPHICS) EXTENDED SEQUENCER REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03C4-03C5, Tseng Labs GRAPHICS) EXTENDED SERIAL PORTIBM PC Portable (uses same BIOS as XT) STATUS/CONTROL (INT 14, X00 FOSSIL(Fido/Opus/Seadog Standard Interface Layer) A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use., AH=1Fh) EXTENDED STATUS (INT 14, HUNTER 16, AH=22h) EXTENDED WRITE (INT 13, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions, AH=43h) EXTENDED-LENGTH FILENAME OPERATIONS (INT 21, MS-DOS 7.20 (Win98), AX=43FFh/BP=5053h) EXTENSION REGISTERS (PORTIBM PC Portable (uses same BIOS as XT) 03D6-03D7, Chips&Technologies VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers.) EXTERNAL CACHE (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 48h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. (Saturn)) EXTERNAL CARD INTERRUPT {callout or callback} (INT 0E, HP 95LX) EXTERNAL STATUS (INT 6B, NPC NCSI EXTENDED SERIAL I/O, AH=1Fh) Extract Bit Field (OPCODE EXT) Extract Bits String (OPCODE XBTS) Extract Word (OPCODE PEXTRW) F-PROT v2.x - ??? (INT 2F, AX=4653h/CX=0008h) F.P. Accumulate (OPCODE PFACC) F.P. Reciprocal Approximation (OPCODE PFRCP) F.P. Reciprocal Square Root Approximation (OPCODE PFRSQRT) FACTORY ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. DATA AREA POINTER (NOT A VECTOR!) (INT 61, TI Professional PCIBM PC) FAR JMP instruction for CP/M-style calls (INT 30, (NOT A VECTOR!), DOS 1+) Fast Blank Interface Mode 2 (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/31h, ITT VDP 31xxB) Fast Blank Interface Mode (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/32h, ITT VDP 3108) Fast Blank Interface Mode (I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. 8Ah/32h, ITT VDP 31xxB) FAST CONSOLE OUTPUT {callout or callback} (INT 29, DOS 2+) FAST GET KEYSTROKE (INT 79, AVATAR(Advanced Video Attribute Terminal Assembler and Recreator) A set of control codes which may be used to affect the output of characters to the screen on systems equipped with an appropriate driver. Similar in intent to ANSI sequences, AVATAR has shorter command sequences and provides additional PC-specific functionality. AVATAR is primarily used by the Opus and Maximus bulletin board systems (it was designed by one of the developers of the Opus system)..SYS) Fast Restore F.P. Context (OPCODE FXRSTOR) Fast Save F.P. Context (OPCODE FXSAVE) Faster Enter/Exit of MMX of F.P. state (OPCODE FEMMS) FastJuice - DISABLE/UNLOAD??? {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} (INT 16, AX=6A6Bh) FASTOPEN (CALL xxxxh:xxxxh) FAT32 - "Get_ExtDPB" - GET EXTENDED DPBsee Drive Paramter Block (INT 21, Windows95, AX=7302h) FATAL SOFTWARE ERROR TRAP (INT 50, TI Professional PCIBM PC) FAX TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user. The name comes from the name of the DOS function call used to remain in memory after termination. (INT 2F, FAXPLUS, AH=CAh) FDC 1 (1st Floppy Disk Controller) second FDC at 0370 (PORTIBM PC Portable (uses same BIOS as XT) 03F0-03F7) FDC 2 (2nd Floppy Disk Controller) first FDC at 03F0 (PORTIBM PC Portable (uses same BIOS as XT) 0370-0377) Feature Control Register #1 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0107h, Centaur (IDTsee Interrupt Descriptor Table) WinChip C6/WinChip2) Feature Control Register #2 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0108h, Centaur (IDTsee Interrupt Descriptor Table) C6/WinChip2) Feature Control Register #3 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:0109h, Centaur (IDTsee Interrupt Descriptor Table) C6/WinChip2) Feature Control Register #4 (MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like. These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 0000h:010Ah, IDTsee Interrupt Descriptor Table WinChip2) FEED BACK BUFFER (INT 7C, SK-UPPS Data Link Interface API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running. Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes., AX=000Fh) FETCH AN ENTRY FROM A PREVIOUS LOOKUP (INT B3, ZIPKEY, AH=7Ah) FETCH RAW BYTES RECEIVED (INT 60, FTP(File Transfer Protocol) The standard protocol for copying files from one machine to another on a TCP/IP (Internet) network. Also the program of the same name with which a user may transfer files. Packet DriverAny one of the numerous drivers conforming to FTP Software's Packet Driver Specification, which provides a hardware-independent network interface. See also NDIS, ODI. v1.10+, EXTENDED FUNC, AH=1Ch) FGDRIVER 1.10,3.03+ - "FG_AUTOMODE" - GET VIDEO MODE W/MOST FEATURES {partially documented} (INT 62, AX=0004h) FGDRIVER v1.10 only - "FG_DISPPCX" - DISPLAY PCX FILE {partially documented} (INT 62, AX=0060h) FGDRIVER v3.03+ - "FG_ALLOCATE" - CREATE VIRTUAL VIDEO PAGE {partially documented} (INT 62, AX=0000h) FGDRIVER v3.03+ - "FG_ALLOCCMS" - CREATE LOGICAL VIDEO PAGE (CONVIBM Convertible) {partially documented} (INT 62, AX=0001h) FGDRIVER v3.03+ - "FG_ALLOCEMS" - CREATE LOGICAL VIDEO PAGE (EMSsee Expanded Memory Specification) {partially documented} (INT 62, AX=0002h) FGDRIVER v3.03+ - "FG_ALLOCXMS" - CREATE LOGICAL VIDEO PAGE (XMSsee Extended Memory Specification) {partially documented} (INT 62, AX=0003h) FGDRIVER v3.03+ - "FG_BESTMODE" - GET BEST VIDEO MODE GIVEN RESOLUTN {partially documented} (INT 62, AX=0005h) FGDRIVER v3.03+ - "FG_BOX" - DRAW UNFILLED RECTANGLE {partially documented} (INT 62, AX=0006h) FGDRIVER v3.03+ - "FG_BOXDEPTH" - SET RECTANGLE BORDER WIDTH {partially documented} (INT 62, AX=0007h) FGDRIVER v3.03+ - "FG_BOXX" - XOR HOLLOW RECTANGLE {partially documented} (INT 62, AX=0008h) FGDRIVER v3.03+ - "FG_BUTTON" - GET JOYSTICK BUTTON STATE {partially documented} (INT 62, AX=0009h/BX=0002h) FGDRIVER v3.03+ - "FG_CAPSLOCK" - GET STATE OF CAPSLOCK KEY {partially documented} (INT 62, AX=000Ah) FGDRIVER v3.03+ - "FG_CHGATTR" - APPLY CURRENT TEXT ATTRIB TO CHARS {partially documented} (INT 62, AX=000Bh) FGDRIVER v3.03+ - "FG_CHGTEXT" - DISPLAY STRING ATIBM PC AT CURSOR POSITION {partially documented} (INT 62, AX=000Ch) FGDRIVER v3.03+ - "FG_CIRCLE" - DRAW UNFILLED CIRCLE {partially documented} (INT 62, AX=000Dh) FGDRIVER v3.03+ - "FG_CIRCLEF" - DRAW FILLED CIRCLE {partially documented} (INT 62, AX=000Eh) FGDRIVER v4.02 - "FG_CLIPMAP" - DISPLAY CLIPPED IMAGE (MODE-INDEP) {partially documented} (INT 62, AX=000Fh)