MS Windows - "VNETBIOS" VIRTUAL DEVICE 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. {callout or callback} (INT 2F, AX=1607h/BX=0014h) MS Windows - "W32S" VIRTUAL DEVICE - ??? CALLOUT {callout or callback} (INT 2F, AX=1607h/BX=002Dh) MS Windows 3.1 - "BLOCKDEV" VIRTUAL HARD DISK DEVICE 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. {callout or callback} (INT 2F, AX=1607h/BX=0010h) MS Windows debugging kernel - "DefineDebugSegment" {protected mode} (INT 41, AX=0050h) MS Windows debugging kernel - "OutputDebugString" {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, AX=0012h) MS Windows WINOLDAP - SWITCHING ??? {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, AX=4601h) MS Windows WINOLDAP - SWITCHING ??? {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, AX=4602h) MS Windows95 - "VKD" VIRTUAL DEVICE - ??? CALLOUT {callout or callback} (INT 2F, AX=1607h/BX=000Dh) MS-DOS 1.x LOAD ADDRESS (MEM 0000h:0600h) MS-DOS 2+ LOAD ADDRESS (MEM 0000h:0700h) MS-DOS 7 kernel - BOOT LOGO SUPPORT??? {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, AX=160Eh/AX=04h) MS-DOS 7 kernel - 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, AX=1612h) MS-DOS 7 kernel - GET/SET ??? HANDLER {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, AX=160Fh) MS-DOS 7 kernel - GET/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 2F, AX=1690h) MS-Manager {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, AH=18h) MS-NET - ??? {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, AH=13h) MSB Cropping (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. 88h/03h, Brooktree Bt819A) MSB of password checksum (see byte 1Ch) (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 1Dh, AWARD) MSB of Word to 82335 RC1 roll compare register (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 1Ch, PHOENIX) MSB of Word to 82335 RC2 roll compare register (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 1Eh, PHOENIX) MSB word to Intel 82335 CC0 compare register (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Ah, PHOENIX) MSB word to Intel 82335 CC1 compare register (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Ch, PHOENIX) MSM58321RS clock (PORTIBM PC Portable (uses same BIOS as XT) 02A2-02A3) Multi-DOS (INT 7A, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. 3270 Workstation Program 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., AH=09h/BX=8020h/CX=00FFh) MULTIFUNCTION CONTROL (PORTIBM PC Portable (uses same BIOS as XT) BEE8-BEE9, 8514/A and compatible) MULTIPLE FONT CONTROL (INT 10, SOLLEX SuperVGA, AX=7F06h) Multiplex - ??? - INSTALLATION CHECK??? (INT 2F, AX=E700h/BX=4158h/CX=4953h/DX=4845h) Multiplex - ??? - INSTALLATION CHECK??? (INT 2F, AX=FA00h) Multiplex - ??? (INT 2F, AX=43D6h) Multiplex - ??? (INT 2F, AX=7F24h) Multiplex - ??? (INT 2F, AX=7F26h) MULTIPLEXOR {partially documented} (INT 21, Novell NetWare v3.01+ shell interface, AH=F2h) Multiply Signed Packed 16-bits with rounding and store to 16bit (OPCODE PMULHRW) MULTIPROCESSOR AVAILABLE (INT 15, Compaq Systempro, AX=E200h) MULTIPROCESSOR DISPATCH (INT 15, Compaq Systempro, AX=E00Fh) MULTIPROCESSOR END-OF-DISPATCH (INT 15, Compaq Systempro, AX=E10Eh) MUTE STATES (INT 61, Atari Portfolio, AH=18h) NAME TASK (INT 2F, DR DOS 6.0 TaskMAX, AX=2709h) Nanosoft, Inc. TurboNET - NETWORK PROCESSING ??? {callout or callback} (INT 66) Nanosoft, Inc. TurboNET redirector - ??? {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, AX=8101h) Nanosoft, Inc. TurboNET redirector - ??? {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, AX=8102h) Nanosoft, Inc. TurboNET redirector - ??? {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, AX=8104h) Nanosoft, Inc. TurboNET redirector - ??? {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, AX=8105h/CX=0000h/DX=0000h) Nanosoft, Inc. TurboNET redirector - GET MACHINE NAME??? {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, AX=8103h) Nanosoft, Inc. TurboNET server - ??? (INT 2F, AX=8001h) National Semiconductor DP8390(1)C/NS3249C network chipset (PORTIBM PC Portable (uses same BIOS as XT) 0360-036F) NATIVE 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., protected mode} (INT 2E, Windows NT) NDS GET SERVER NAME AND ADDRESS (INT 21, Novell NetWare v4+, AX=F268h) NDS LIST PARTITIONS (INT 21, Novell NetWare v4+, AX=F268h) NDS LOGOUT (INT 21, Novell NetWare v4+, AX=F268h) NE2000 compatible Ethernet adapters (PORTIBM PC Portable (uses same BIOS as XT) 0300-031F) NE2100-compatible Ethernet adapters (PORTIBM PC Portable (uses same BIOS as XT) 0300-031F, AMD PCnet) NETBIOS - ??? {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 65, NetSoft DOS-NET v1.20+, DX=4741h/BH=01h/AL=07h) NETBIOS CLIENT SERVICE (INT 61, Banyan VINES, AX=0009h) 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). INTERFACE (INT 5C) NetHandleGetInfo {partially documented} (INT 21, LAN Manager Enhanced DOS, AX=5F3Ch/SI=0001h) NetHandleSetInfo {partially documented} (INT 21, LAN Manager Enhanced DOS, AX=5F3Bh) Netroom NETSWAP4 - ??? {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 B5) Netroom RM386 v6.00 (CALL xxxxh:xxxxh) Netroom SCRNCLK - ??? (INT 10, AH=D5h) Netroom3 - ??? (INT 67, AX=DE0Fh) Netroom3 DPMIsee DOS Protected-Mode Interface.EXE v3.00 - ??? (INT 31, AH=57h/AL=02h) NetServerEnum2 {partially documented} (INT 21, LAN Manager Enhanced DOS, AX=5F53h) NetSoft DOS-NET v1.20+ - ??? 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 65, DX=4147h/BH=01h) NetSoft DOS-NET v1.20+ - ??? 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 65, DX=4147h/BH=02h) NetSoft DOS-NET v1.20+ - ??? 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 65, DX=4147h/BH=03h) NetSoft DOS-NET v1.20+ - ??? 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 65, DX=4147h/BH=04h) NetSoft DOS-NET v1.20+ - ??? 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 65, DX=4147h/BH=07h) NetSoft DOS-NET v1.20+ - INSTALLATION CHECK??? {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 65, DX=4147h/BH=80h) NetUseGetInfo {partially documented} (INT 21, LAN Manager Enhanced DOS, AX=5F49h) NetWare Access Server - GET ??? ECB AND SOCKET {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 7A, Novell NetWare, BX=001Dh) NetWare Access Server - GET ??? ECB {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 7A, Novell NetWare, BX=001Eh) NetWare Access Server - 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 7A, Novell NetWare, BX=001Ch) NetWare Remote BootTo start up the computer or operating system. The term "boot" is a contraction of "bootstrap", which in turn comes from the expression "to lift oneself by one's boot straps." The ROM BIOS on IBMInternational Busiuness Machines PCs and compatibles reads in the first sector of the disk, which contains a short (less than 500 bytes) program that reads in a portion of the operating system, which in turn reads in the remainder of the operating system. See also IPL. - ??? (INT F4) NETWORK - ??? (INT 2A, AX=2002h) NETWORK - ??? (INT 2A, AX=2003h) Network - ??? {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, AH=C2h/BX=0001h) NETWORK PRINT-STREAM CONTROL (INT 2A, NETBIOS, LANtastic, AH=06h) NETWORK REDIRECTOR (DOS 4.0+) - "UPDATE_CB" - ??? {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, AX=112Ch) NETWORK REDIRECTOR - ??? (INT 21, CBIS network, AX=3306h) NETWORK WORKSTATION REDIRECTOR (INT 2F, LAN Manager 2.0 DOS Enh NETWKSTA.EXE, AH=4Bh) NEW ACTIVE MONITOR (INT 10, VIDEO, Compaq Extensions, AX=BF12h) NEW LOAD PROGRAM FOR DEBUG {protected mode} (INT 21, Phar Lap 386/DOS-Extender VMM, AX=252Ah) Newline (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. 8Eh/22h, ITT VDP 31xxB) NewSpace - ??? {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, AX=44FFh/BX=FFFFh) NewSpace - 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 21, AX=4413h/BX=FFFFh) NewSpace - INSTALLATION CHECK??? {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, AX=4412h/BX=FFFFh) NJFRERAM SIGNATURE VECTOR (INT D0, [not a vector!]) NLCACHE/NWCACHE (CALL xxxxh:xxxxh, Novell NetWare Lite) NMIsee Non-Maskable Interrupt CONTROL (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 44h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985.) NMIsee Non-Maskable Interrupt CONTROL (PORTIBM PC Portable (uses same BIOS as XT) 0072, Chips&Technologies 82C100) NMIsee Non-Maskable Interrupt CONTROL (PORTIBM PC Portable (uses same BIOS as XT) 00A0-00AF, Chips&Technologies 82C100/110) NMIsee Non-Maskable Interrupt MASK REGISTER (PORTIBM PC Portable (uses same BIOS as XT) 00A0, XTIBM PC XT) NMIsee Non-Maskable Interrupt REDIRECT (INT 81, Gravis UltraSound, MEGA_EM v3.0+, AX=2011h) NMIsee Non-Maskable Interrupt STATUS (PORTIBM PC Portable (uses same BIOS as XT) 007E, Chips&Technologies 82C100/110) NO ACTIVITY FEATURE {partially documented} (INT 94, Media Vision PCM.COM, AL=08h/SI=8017h) NON-DESTRUCTIVE READ (INT 14, MBBIOS, AH=08h) NON-DESTRUCTIVE READ AHEAD (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=0Ch) NON-KEYBOARD SCAN-CODE TRANSLATION TABLE (PCjr) (INT 49, SYSTEM DATA) NON-MASKABLE INTERRUPT {callout or callback} (INT 02, external hardware) non-standard COM port addresses (V20-XT by German magazine c't) (PORTIBM PC Portable (uses same BIOS as XT) 0280-0288) non-standard COM port addresses (V20-XT by German magazine c't) (PORTIBM PC Portable (uses same BIOS as XT) 0288-028F) non-standard COM port addresses (PORTIBM PC Portable (uses same BIOS as XT) 06A0-06A8) non-standard COM port addresses (PORTIBM PC Portable (uses same BIOS as XT) 06A8-06AF) NON-TSR EXECUTING CHECK (INT 2F, Explosiv v2.00+, AX=C04Eh) NOP (INT 10, ATI Rage128 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=A016h) NOP (INT 15, DESQview/X 1.02+, DVDOS4GX.DVR, AX=BFDEh/BX=FFFFh) NOP (INT 2F, Novell DOS 7 TaskMGR, AX=2719h) NOP (INT 33, Switch-It v3.23, AX=FFF9h) NOP (INT 4D, TI Professional PCIBM PC, DISK, AH=05h) NOP (INT 63, BW-TCP, TCPIP.SYS, AH=13h) NOP (INT 66, PenDOS, PMOUSE, AH=51h) NOP (INT 7E, MaxSBOS v0.21, AH=03h) NOP for ETHDEV.ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc. See also NDIS, Packet Driver. (INT 62, BW-TCP, HW DRIVER (ETHDEV.SYS), AH=01h) NOP for ETHDEV.ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc. See also NDIS, Packet Driver. (INT 62, BW-TCP, HW DRIVER (ETHDEV.SYS), AH=0Dh) NOP for SLIP kernel {partially documented} (INT 61, PCIBM PC/TCP(Transmission Control Protocol) A higher level (session layer) of the TCP/IP protocol suite. See also IP, TCP/IP. kernel v2.05) NOP {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., protected mode} (INT 21, Rational Systems DOS/4GW, AH=FFh/DH=11h) NOP {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=29h) NOP {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 DOS 7, AH=6Dh) NOP {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, PrintCache v3.1 PCACHE.EXE, AX=C00Bh) NOP {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, PrintCache v3.1 PCACHE.EXE, AX=C01Dh) NOP {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, FORTUNE.EXE, AX=C305h/DX=9003h) NORMAL/REVERSE VIDEO FOR TEXT/GRAPHICS MODES (INT 10, VIDEO, FLAT-PANEL, AX=1E04h) NORMALIZE ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. 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 2F, DOS 3.0+ internal, AX=1211h) NORMALIZE PATH SEPARATOR {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+ internal, AX=1204h) Notch Filter Gain (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/45h, ITT VDP 3108, Luma Soft Limiter) NOTES (INT 2F, Multiplex) Notes (INT 7A, Novell NetWare, LOW-LEVEL 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.) Novell DOS 7 DELWATCH.EXE (CALL xxxxh:xxxxh) Novell DOS 7 EMM386.EXE (CALL xxxxh:xxxxh) Novell DOS 7 KEYB - ??? {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, AX=AD02h) Novell DOS 7 KEYB - GET/SET??? CONFIGURATION {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, AX=AD01h) Novell DOS 7 TaskMGR - ??? 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 2F, AX=278Fh) Novell DOS 7 TaskMGR - ??? {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, AX=271Ch) Novell DOS 7 TaskMGR - BEGIN 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 2F, AX=2781h) Novell DOS 7 TaskMGR - END 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 2F, AX=2782h) Novell DOS 7+ FDOS EXTENSIONS - FIXUP CHECKSUMS / DIR UPDATE??? {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, AX=1008h) Novell DOS 7+ FDOS EXTENSIONS - NEXT CLUSTER / READ FATsee File Allocation Table??? {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, AX=1006h) Novell DOS 7+ FDOS EXTENSIONS - UPDATE FATsee File Allocation Table ENTRY / WRITE FATsee File Allocation Table??? {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, AX=1007h) Novell NetWare - "AttachHandle" {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=B4h) Novell NetWare - "HoldFileModeSet" (obsolete) {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=B7h) Novell NetWare - "ReturnCommandComPointers" {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=BAh) Novell NetWare - "SpecialAttachableFunction" {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=B9h/AL=FFh) Novell NetWare - ??? {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, AX=7A4Dh/BX=0001h) Novell NetWare - CHECK LIP/PACKET SIGNING/IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. CHECKSUM SUPPORT??? {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, AX=B300h) Novell NetWare - CHECK SIGNATURE LEVEL??? {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, AX=B301h) Novell NetWare - IS BINDERY OBJECT IN SET? (INT 21, AX=F217h/DX=0000h) Novell NetWare - IS STATION A MANAGER? (INT 21, AX=F217h/DX=0000h) Novell NetWare - IS USER AUDITED? (INT 21, AX=F258h) Novell NetWare LU6.2 (INT 68) Novell NWCACHE - ??? {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, AX=4A10h/BX=0001h/CX=0EDCh) Novell TelAPI v4.01 - CONNECTION CONTROL??? (INT 14, AH=A9h) Novell TelAPI v4.01 - CONNECTION INFORMATION??? (INT 14, AH=A8h) NOW! v3.05 - ??? (INT 13, AX=7B01h) NOW! v3.05 - ??? (INT 13, AX=7B03h) NOW! v3.05 - ??? (INT 13, AX=7B04h) NOW! v3.05 - ??? (INT 13, AX=7B08h/CX=00h) NOW! v3.05 - GET ??? (INT 13, AX=7B06h) NOW! v3.05 - GET ??? (INT 13, AX=7B07h) NOW! v3.05 - GET DISK ACCESSES??? (INT 13, AX=7B05h) NTSC Tint Angle (color balance) (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. 86h/28h/1Ch, ITT VPX 32xx, FP) NULL FUNCTION (INT 21, DR DOS 5.0, AH=69h) NULL FUNCTION FOR CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. COMPATIBILITY (INT 21, DOS 1+, AH=18h) NULL FUNCTION FOR CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. COMPATIBILITY (INT 21, DOS 1+, AH=1Dh) NULL FUNCTION FOR CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. COMPATIBILITY (INT 21, DOS 1+, AH=1Eh) NULL FUNCTION FOR CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. COMPATIBILITY (INT 21, DOS 1+, AH=20h) NULL FUNCTION {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 2F, Borland C++ 3.0 DPMILOAD.EXE, AX=FB43h) NULL FUNCTION {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, DOS 5+, AH=6Bh) NUMBER OF FIXED DISK DRIVES (MEM 0040h:0075h, FIXED DISK) NUMBER OF FLOPPY DISK CONTROLLERS IN SYSTEM (MEM 0040h:00D5h, EHD floppy) NUMBER OF KEYBOARDS FOUND (MEM 0040h:00D6h, Digiboard MV/4) number of last PCI bus in system (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 62h, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. (Neptune)) NUMBER OF MICE FOUND (MEM 0040h:00D8h, Digiboard MV/4) NumLock CONTROL (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Ch, COMPAQ) OBSOLETE FUNCTIONS {obsolete} (INT D4, PC-MOS/386 v5.01, AH=00h) ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc. See also NDIS, Packet Driver. Link Support Layer (CALL xxxxh:xxxxh, Novell) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. APM FUNCTIONS (INT 15, Advanced Power Management v1.1, AX=5380h) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. APM INSTALLATION CHECK (INT 15, Advanced Power Management v1.1, AX=5380h/BH=7Fh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=F9h) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FAh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FBh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FCh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FDh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FEh) OEM(Original Equipment Manufacturer) a company which purchases components that are resold as part of its own products under the company's own brand name, e.g. a Gateway 2000-branded monitor may actually be a Mag or NEC monitor. FUNCTION (INT 21, DOS v2.11-2.13, AH=FFh) Official Undefined Opcode (OPCODE OIO) OFFICIALLY RESERVED (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Ah, HP Vectra) OFFICIALLY RESERVED (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Bh, HP Vectra) OFFICIALLY RESERVED (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Ch, HP Vectra) OFFICIALLY RESERVED (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 2Dh, HP Vectra) OFFSET OF PINS DATA STRUCTURE (MEM C000h:7FFCh, Matrox MGA Video Adapters) OFTEN USED TO ENSURE CORRECT 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. CHECKSUM (MEM F000h:FFFDh) OLIVETTI 640x400 GRAPHICS CARDS (MEM C000h:0000h) Olivetti M24 (PORTIBM PC Portable (uses same BIOS as XT) 0065-0066) OLIVETTI Mxxx PCIBM PC SIGNATURE (MEM FC00h:0050h) Olivetti Quaderno - ??? (INT 15, AX=44C1h) Olivetti Quaderno - ??? (INT 15, AX=44C2h) Olivetti Quaderno - ??? (INT 15, AX=44C4h) Olivetti Quaderno - ??? (INT 15, AX=44C8h) Olivetti Quaderno - GET ??? (INT 15, AX=44C3h) Olivetti Quaderno - INITIALIZE DIGITAL SIGNAL PROCESSING??? (INT 15, AX=44C0h) Omti controller - SEGMENT OF 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. DATA AREA??? (MEM 0040h:00EAh) ON-BOARD PERIPHERALS (CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. 4Bh, AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. (Saturn)) ON-SCREEN DISPLAY COLUMN (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. 28h/03h, Philips SAA5252) ON-SCREEN DISPLAY DATA (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. 28h/04h, Philips SAA5252) ON-SCREEN DISPLAY ROW (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. 28h/02h, Philips SAA5252) OPCODE D8h (INT 34, FLOATING POINT EMULATION) OPCODE D9h (INT 35, FLOATING POINT EMULATION) OPCODE DAh (INT 36, FLOATING POINT EMULATION) OPCODE DBh (INT 37, FLOATING POINT EMULATION) OPCODE DCh (INT 38, FLOATING POINT EMULATION) OPCODE DDh (INT 39, FLOATING POINT EMULATION) OPCODE DEh (INT 3A, FLOATING POINT EMULATION) OPCODE DFh (INT 3B, FLOATING POINT EMULATION) OPEN \DESK.OVL FILE AND SEEK TO OVERLAY {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+ DESKTOP, AX=FF98h) OPEN BINDERY (INT 21, Novell NetWare, AX=F217h/DX=0000h) OPEN BINDERY (INT 21, Novell NetWare, BINDERY SERVICES, AH=E3h) OPEN BOOT LOG {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, Windows95, AX=4A16h) OPEN 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, Emulaser ELTSR, AH=07h) OPEN CHANNEL (INT 7F, Alloy NTNX, MW386, CHANNEL CONTROL, AH=10h/CL=00h) OPEN CLIPBOARD {partially documented} (INT 60, HP 95LX System Manager, DI=0700h) OPEN COMMUNICATION (INT 14, Connection Manager, AH=04h/DX=FFFFh) OPEN COMMUNICATIONS CHANNEL {partially documented} (INT 60, HP 95LX System Manager, DI=0E01h) OPEN CONNECTION {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, Quarterdeck TELTSR.COM, AX=DF02h) OPEN DATA STREAM (INT 21, Novell NetWare, AX=F216h) OPEN DEVICE (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. VBE(VESA BIOS Extensions) The common software interface for video cards providing support for high resolution and bit depth./AI (Audio Interface), AX=4F13h/BX=0003h) OPEN DEVICE AND SET SFTsee System File Table OWNER/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 2F, DOS 3.0+ internal, AX=120Ch) OPEN EXISTING REMOTE 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, AX=1116h) OPEN FILE (INT 2F, Communicating Applications SpecificationDCA and Intel's standard programmatic interface for sending and receiving FAXes via any of a number of internal FAX boards., AX=CB07h) OPEN FILE IN READ-ONLY MODE {partially documented} (INT 60, HP 95LX System Manager, DI=0501h) OPEN FILE USING FCBsee File Control Block (INT 21, DOS 1+, AH=0Fh) OPEN FILE {partially documented} (INT 60, HP 95LX System Manager, DI=0500h) OPEN 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 2F, DOS 3.3+ internal, AX=1226h) OPEN GAME DEVICE {real mode} (INT 2F, InterWave Game 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=CD21h) OPEN LOOK-AHEAD SOCKET (INT 7A, Novell NetWare, IPXODI v2.12+, BX=0023h) OPEN MESSAGE PIPE {obsolete} (INT 21, Novell NetWare, MESSAGE SERVICES, AH=E1h) OPEN NETWORK CONNECTION (INT 63, BW-TCP, TCPIP.SYS, AH=14h) OPEN PRINTER {partially documented} (INT 60, HP 95LX System Manager, DI=0C00h) OPEN REMOTE 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, IFSFUNC.EXE (DOS 4.x only), AX=1115h) OPEN SEMAPHORE (OLD) (INT 21, Novell NetWare, AX=F220h) OPEN SEMAPHORE (INT 21, Novell NetWare, AX=F26Fh) OPEN SEMAPHORE (INT 21, Novell NetWare, SYNCHRONIZATION SERVICES, AX=C500h) OPEN SESSION (INT 69, DECnet DOS CTERM, AX=0105h) OPEN SESSION (INT 6A, DECnet DOS LOCAL AREA TRANSPORT, AH=D0h/DH=FFh) OPEN SOCKET (INT 61, Banyan VINES, AX=000Fh) OPEN SOCKET (INT 7A, Novell NetWare, IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. Driver, BX=0000h) OPEN TEXT WINDOW (INT 50, Vanderaart TEXT WINDOWS, PCIBM PC Thuis Shell, AX=0000h) OPEN VFOSSIL (INT 14, VIDEO 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., AX=8101h) OPEN WINDOW (INT 2F, Kingswood 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. Windows, AX=3901h/BL=02h) OPEN/CREATE FILE OR SUBDIRECTORY (INT 21, Novell NetWare, AX=F257h) OPERATION COMPLETE {callout or callback} (INT 77, IRQ15, SECONDARY IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself. See also ESDI. CONTROLLER) OPERATIONAL CONTROL (INT 11, RainbowFAX v1.3, SFENGINE 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., AH=77h) OPERATOR INFORMATION AREA (INT 7A, IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. 3270 Workstation Program 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., AH=09h/BX=8020h/CX=00FFh) OPTHELP.COM (INT 6A) OPTION 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 62, TI Professional PCIBM PC) OPTION 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 63, TI Professional PCIBM PC) OPTION 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 64, TI Professional PCIBM PC) OPTION 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 65, TI Professional PCIBM PC) Oracle SQL(Structured Query Language) 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. Executive - ??? (INT 63) Oracle SQL(Structured Query Language) 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. Executive - ??? (INT 64) ORIGINAL IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. PCIBM PC ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. 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. (MEM F000h:E000h) ORIGINAL INT 08 VECTOR (INT F0, BASICA.COM, GWBASIC, compiled BASIC(Beginner's All-purpose Symbolic Instruction Code) A programming language originally designed as a means of teaching FORTRAN. There are many variations of BASIC with differing capabilities; the majority are interpreted but compiled BASIC is becoming more popular. All genuine IBMInternational Busiuness Machines personal computers (including the latest PS/2IBM PS/2, any model models) come equipped with a cassette-based BASIC interpreter in ROM.) ORIGINAL INT 09 VECTOR (INT EF, BASIC(Beginner's All-purpose Symbolic Instruction Code) A programming language originally designed as a means of teaching FORTRAN. There are many variations of BASIC with differing capabilities; the majority are interpreted but compiled BASIC is becoming more popular. All genuine IBMInternational Busiuness Machines personal computers (including the latest PS/2IBM PS/2, any model models) come equipped with a cassette-based BASIC interpreter in ROM.) ORIGINAL INT 13 (INT 78, ADP-60 IDE(Integrated Drive Electronics) A type of disk drive interface which essentially extends the PCIBM PC's expansion bus all the way to the drive and places the drive controller on the disk drive itself. See also ESDI. controller) ORIGINAL INT 13 (INT F2, NetWare Remote BootTo start up the computer or operating system. The term "boot" is a contraction of "bootstrap", which in turn comes from the expression "to lift oneself by one's boot straps." The ROM BIOS on IBMInternational Busiuness Machines PCs and compatibles reads in the first sector of the disk, which contains a short (less than 500 bytes) program that reads in a portion of the operating system, which in turn reads in the remainder of the operating system. See also IPL.) ORIGINAL INT 13/40 (INT 63, 4+Power FLOPPY CONTROLLER) ORIGINAL INT 18 (INT 86, 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).) ORIGINAL INTERRUPT VECTORS 10h,13h,15h,19h,1Bh (MEM 0070h:0100h, DOS 5+) OS/2 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. DOS32StartSession {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 v2.1+ 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/BX=0025h/CX=636Ch) OS/2 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. DosForceDelete {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 v2.1+ 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/BX=00CBh/CX=636Ch) OS/2 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. DosQFSAttach {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 v2.1+ 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/BX=00B6h/CX=636Ch) OS/2 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. support {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 v2.1+ 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/CX=636Ch) OS/2 FILE SYSTEM JOIN/SUBST {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 v1.x FAPI, AH=61h/BP=6467h) OS/2 v1.x FAPI - "DosEnumAttrib" {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=6Eh) OS/2 v1.x FAPI - "DosMkDir2" {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=6Dh) OS/2 v1.x FAPI - "DosQMaxEASize" - GET MAXIMUM SIZE OF EXTENDED ATTR {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, AX=6F00h) OS/2 v2.0 - "DosOpen2" {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, AX=6C01h) OTHER PROGRAM STATUS (INT 21, DoubleDOS, AH=E5h) OTHER PROGRAM STATUS (INT 21, DoubleDOS, AH=F5h) OUTPUT CHAR TO AUX: DEVICE (CALL 0060h:0012h, Eagle MS-DOS v1.25 IO.SYS) OUTPUT CHARACTER (INT 1A, NEC PC-9800 series, PRINTER, AH=11h) OUTPUT CHARACTER (INT 4B, TI Professional PCIBM PC, PARALLEL PORTIBM PC Portable (uses same BIOS as XT), AH=00h) OUTPUT CHARACTER (INT FD, TFPCX, AH=03h) OUTPUT CHARACTER FOR USER {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=0000h) OUTPUT CHARACTER TO PRINTER (CALL 0060h:000Ch, Eagle MS-DOS v1.25 IO.SYS) OUTPUT CHARACTER TO SCREEN (CALL 0060h:0009h, Eagle MS-DOS v1.25 IO.SYS) OUTPUT CHARACTER TO STANDARD OUTPUT {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+ internal, AX=1205h) OUTPUT CHARACTER WITHOUT CONVERSION (INT 17, AX (Japanese ATIBM PC AT) PRINTER, AH=84h) OUTPUT CHARACTER, WITH TIMEOUT (INT 14, PC-MOS/386 v5.01 $serial.sys v5.04, AH=21h) OUTPUT DEBUGGING MESSAGE {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 03, Watcom WVIDEO, Watcom WD) Output Enable (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. 86h/F2h, ITT VPX 32xx) Output FIFO (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. 86h/F0h, ITT VPX 32xx) OUTPUT FORMAT (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. 88h/12h, Brooktree Bt819A) OUTPUT LINE TO WINDOW (INT 50, Vanderaart TEXT WINDOWS, AX=0003h) Output Multiplexor (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. 86h/F1h, ITT VPX 32xx) OUTPUT NULL-TERMINATED STRING THROUGH QRIP (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=AC05h/DI=1092h) OUTPUT NULL-TERMINATED STRING THROUGH QRIP (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=AC0Ah/DI=1092h) Output Pin Configuration (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/10h, ITT VDP 31xxB) OUTPUT PORTS (PORTIBM PC Portable (uses same BIOS as XT) 037C-037F, C&T F87000 Multi-Mode Peripheral Chip) OUTPUT STATUS (INT 14, COURIERS.COM, AH=87h) OUTPUT STRING (INT 14, PC-MOS/386 v5.01 $serial.sys v5.04, AH=14h/SI=0000h) OUTPUT STRING (INT 68, MS Windows debugging kernel, AH=47h) OUTPUT STRING THROUGH QRIP (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=AC04h/DI=1092h) OUTPUT STRING THROUGH QRIP (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=AC09h/DI=1092h) OUTPUT TEXT (INT 10, CU Writer v1.4, AH=C1h) OVERLAY MANAGER (INT FE, Turbo Debugger 8086 v2.5+) Overlay manager interrupt (Microsoft LINK.EXE, Borland TLINK VROOMM) (INT 3F) OVERRIDE LOW POWER TURN OFF (INT 15, HUNTER 16, AH=7Dh/AL=00h) overwritten by CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs). MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. jump instruction in INT 30 (INT 31) Overwritten for Hard Drive information (INT 64, Pdisk by Scott Garfinkle) Overwritten for Hard Drive information (INT 65, Pdisk by Scott Garfinkle) Overwritten for Hard Drive information (INT 66, Pdisk by Scott Garfinkle) Overwritten for Hard Drive information (INT 67, Pdisk by Scott Garfinkle) Pack with Signed Saturation dword to word (OPCODE PACKSSDW) Pack with Signed Saturation word to Byte (OPCODE PACKSSWB) Pack with Unsigned Saturation word to Byte (OPCODE PACKUSWB) Packed 16-bit Integer to FP Conversion (OPCODE PI2FW) Packed 32-bit Integer to F.P. conversion (OPCODE PI2FD) Packed Add Bytes (OPCODE PADDB) Packed Add Dwords (OPCODE PADDD) Packed Add Unsigned with Saturation Bytes (OPCODE PADDUSB) Packed Add Unsigned with Saturation Words (OPCODE PADDUSW) Packed Add with Saturation Bytes (OPCODE PADDSB) Packed Add with Saturation Words (OPCODE PADDSW) Packed Add with Saturation, using Implied Destination (OPCODE PADDSIW) Packed Add Words (OPCODE PADDW) Packed Average (OPCODE PAVEB) Packed Average Byte (OPCODE PAVGB) Packed Average Word (OPCODE PAVGW) Packed Compare for Equal Bytes (OPCODE PCMPEQB) Packed Compare for Equal Dwords (OPCODE PCMPEQD) Packed Compare for Equal Words (OPCODE PCMPEQW) Packed Compare for Greater Than Bytes (OPCODE PCMPGTB) Packed Compare for Greater Than Dwords (OPCODE PCMPGTD) Packed Compare for Greater Than Words (OPCODE PCMPGTW) Packed Conditional Move (OPCODE PMVGEZB) Packed Conditional Move (OPCODE PMVLZB) Packed Conditional Move (OPCODE PMVNZB) Packed Conditional Move (OPCODE PMVZB) Packed Distance and Accumulate with Implied Register (OPCODE PDISTIB) Packed F.P. Addition (OPCODE PFADD) Packed F.P. compariason, greater to (OPCODE PFCMPGT) Packed F.P. comparison, greater or equal to (OPCODE PFCMPGE) Packed F.P. comparson, equal to (OPCODE PFCMPEQ) Packed F.P. Maximum (OPCODE PFMAX) Packed F.P. Minimum (OPCODE PFMIN) Packed F.P. Multiplication (OPCODE PFMUL) Packed F.P. Reciprocal Square Root, 1st iteration step (OPCODE PFRSQIT1) Packed F.P. Reciprocal, first iteration Step (OPCODE PFRCPIT1) Packed F.P. Reciprocal, second iteration Step (OPCODE PFRCPIT2) Packed F.P. Reverse Subtraction (OPCODE PFSUBR) Packed F.P. Subtraction (OPCODE PFSUB) Packed Floating Point Mixed Positive-Negative Accumulate (OPCODE PFPNACC) Packed Floating Point negative accumulate (OPCODE PFNACC) Packed FP to Integer Word conversion with sign extend (OPCODE PF2IW) Packed Magnitude (OPCODE PMAGW) Packed Multiply and Accumulate with Rounding (OPCODE PMACHRIW) Packed Multiply and Add Dwords (OPCODE PMADDWD) Packed Multiply High by Words (OPCODE PMULHW) Packed Multiply high unsignde word (OPCODE PMULHUW) Packed Multiply High with Rounding (OPCODE PMULHRW) Packed Multiply High with Rounding, result to Implied Register (OPCODE PMULHRIW) Packed Multiply Low by Words (OPCODE PMULLW) Packed Shift Left Logical Dwords (OPCODE PSLLD) Packed Shift Left Logical Qwords (OPCODE PSLLQ) Packed Shift Left Logical Words (OPCODE PSLLW) Packed Shift Right Arithmetic Dwords (OPCODE PSRAD) Packed Shift Right Arithmetic Words (OPCODE PSRAW) Packed Shift Right Logical Dwords (OPCODE PSRLD) Packed Shift Right Logical Qwords (OPCODE PSRLQ) Packed Shift Right Logical Words (OPCODE PSRLW) Packed Shuffle Word (OPCODE PSHUFW) Packed Signed INT32 to Packed Single-FP Conversion (OPCODE CVTPI2PS) Packed Signed Integer Word Maximum (OPCODE PMAXSW) Packed Signed Integer Word Minimum (OPCODE PMINSW) Packed Single FP-Compare (OPCODE CMPPS) Packed Single-FP Add (OPCODE ADDPS) Packed Single-FP Divide (OPCODE DIVPS) Packed Single-FP Maximum (OPCODE MAXPS) Packed Single-FP Minimum (OPCODE MINPS) Packed Single-FP Multiply (OPCODE MULPS) Packed Single-FP Reciprocal (OPCODE RCPPS) Packed Single-FP Square Root (OPCODE SQRTPS) Packed Single-FP Square Root Reciprocal (OPCODE RSQRTPS) Packed Single-FP Subtract (OPCODE SUBPS) Packed Single-FP to Packed INT32 Conversion (Truncate) (OPCODE CVTTPS2PI) Packed Single-FP to Packed INT32 Conversion (OPCODE CVTPS2PI) Packed Subtract Bytes (OPCODE PSUBB) Packed Subtract Dwords (OPCODE PSUBD) Packed Subtract Unsigned with Saturation Bytes (OPCODE PSUBUSB) Packed Subtract Unsigned with Saturation Bytes (OPCODE PSUBUSW) Packed Subtract with Saturation Bytes (OPCODE PSUBSB) Packed Subtract with Saturation Words (OPCODE PSUBSW) Packed Subtract with Saturation, using Implied Destination (OPCODE PSUBSIW) Packed Subtract Words (OPCODE PSUBW) Packed Sum of Absolute Differenses (OPCODE PSADBW) Packed Swap Doubleword (OPCODE PSWAPD) Packed Unsigned Integer Byte Maximum (OPCODE PMAXUB) Packed Unsigned Integer Byte Minimum (OPCODE PMINUB) Pad Driver Strength A (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. 86h/F8h, ITT VPX 32xx) Pad Driver Strength B (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. 86h/F9h, ITT VPX 32xx) PAGE (REGEN BUFFER) SIZE IN BYTES (MEM 0040h:004Ch, VIDEO) Page Attribute Table (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:0277h, PentiumII) PAGE FAULT {callout or callback} (INT 0E, CPU-generated (80386+ native mode)) PAGE LOCKING {protected mode} (INT 21, Phar Lap 386/DOS-Extender, VIRTUAL MEMORY MANAGEMENT, AX=252Bh) PAGE MAPPING (INT 67, EEMS, AH=6Ah) PAGE, SWAPx (INT 61, PC-Magazin) PAL SWITCH SENSITIVITY (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. 9Ch/0Ah, Philips SAA7110(A) ONE-CHIP FRONT-END) PALETTE LOADING (INT 10, VIDEO, ALTERNATE FUNCTION SELECT (VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., MCGAMulti-Color Graphics Array(Multi-Color Graphics Array) The low-end color adapter offered in IBMInternational Busiuness Machines's early PS/2IBM PS/2, any model series machines.), AH=12h/BL=31h) Panasonic 52x CD-ROM 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. Miniport (PORTIBM PC Portable (uses same BIOS as XT) 0300-0303) 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. - ??? (INT 10, AX=007Fh/BH=60h) 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. - ??? (INT 10, AX=007Fh/BH=61h) 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. - ??? (INT 10, AX=007Fh/BH=A5h) 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. - ??? (INT 10, AX=007Fh/BH=A6h) 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. - ??? (INT 10, AX=007Fh/BX=A500h) 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. internal - GET ??? (INT 10, AX=6E00h) 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. internal - GET SCREEN SIZE AND ??? (INT 10, AX=6E04h) PARALLEL DEVICE 1 TIME-OUT COUNTER (MEM 0040h:0078h) PARALLEL DEVICE 2 TIME-OUT COUNTER (MEM 0040h:0079h) PARALLEL DEVICE 3 TIME-OUT COUNTER (MEM 0040h:007Ah) PARALLEL DEVICE 4 TIME-OUT COUNTER (pre-PS, PSIBM PS/2, any model Models 25,30) (MEM 0040h:007Bh) PARALLEL PORTIBM PC Portable (uses same BIOS as XT) 0 CAPABILITIES (MEM 0040h:00D5h, 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) PARALLEL PORTIBM PC Portable (uses same BIOS as XT) 0 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. (MEM 0040h:00D6h, 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)