RBIL61 - I/O Port

86 Bugs List {#idx175981}{#idx175985}{#idx175992}{#idx175999}{#idx176225}{#idx176555}{#idx176585}{#idx176632}{#idx176635}

Bibliography {#idx167351}{#idx167371}{#idx167403}

CALL xxxxh:xxxxh - Plug-and-Play 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. v1.0A {#idx160443}

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/34h - ITT VDP 3108 - Standard Select {#idx171464}

INT 08 - IRQ0 - SYSTEM TIMER {callout or callback} {#idx591}

INT 09 - IRQ1 - KEYBOARD DATA READY {callout or callback} {#idx648}

INT 0A - IRQ2 - LPT2 (PCIBM PC), VERTICAL RETRACE INTERRUPT (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.,VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers.) {callout or callback} {#idx852}

INT 0B - IRQ3 - SERIAL COMMUNICATIONS (COM2) {callout or callback} {#idx923}

INT 0C - IRQ4 - SERIAL COMMUNICATIONS (COM1) {callout or callback} {#idx975}

INT 0D - IRQ5 - FIXED DISK (PCIBM PC,XTIBM PC XT), LPT2 (ATIBM PC AT), reserved (PS/2IBM PS/2, any model) {callout or callback} {#idx1072}

INT 0E - IRQ6 - DISKETTE CONTROLLER {callout or callback} {#idx1146}

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. - GET VBE(VESA BIOS Extensions) The common software interface for video cards providing support for high resolution and bit depth./AF v1.0P DEVICE CONTEXT BUFFER {#idx4613}{#idx4620}

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. v2.0+ - GET PROTECTED-MODE INTERFACE {#idx4554}{#idx4561}

INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PSIBM PS/2, any model, 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., 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.) - GET 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. INFO {#idx2920}{#idx2921}

INT 13 - Future Domain 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. CONTROLLER - GET POINTER TO FREE CONTROLLER RAM(Random Access Memory) See also DRAM, SRAM. {#idx9441}

INT 13 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions - GET DRIVE PARAMETERS {#idx10618}

INT 14 - Alloy MW386 v2+ - CHANGE PHYSICAL PORTIBM PC Portable (uses same BIOS as XT) PARAMETERS {#idx13595}

INT 14 - ARTICOM - INSTALLATION CHECK {#idx14067}

INT 15 - Advanced Power Management v1.0+ - CONNECT 16-BIT PROTMODE INTERFACE {real mode} {#idx19274}

INT 15 - Advanced Power Management v1.0+ - CONNECT 32-BIT PROTMODE INTERFACE {#idx19302}

INT 15 - Compaq Contura 486 and "Alladin" 1993/08/05 ROMs - GET ??? {#idx18974}

INT 15 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. 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. - SMART ENERGY SYSTEM - ??? {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.} {#idx18551}

INT 15 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. SurePath 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. - WAIT REQUESTED TIME PERIOD {#idx15826}

INT 15 - later PSIBM PS/2, any model/2s - RETURN DEVICE DESCRIPTOR TABLE (DDT) ENTRY BY I/O ADDRSS {#idx23324}{#idx23330}

INT 15 - Olivetti Quaderno - ??? {#idx18813}

INT 15 - Olivetti Quaderno - GET ??? {#idx18817}{#idx18820}

INT 15 - SYSTEM - later PSIBM PS/2, any model/2s - QUERY 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 SUPPORT {#idx18665}

INT 15 - SYSTEM - WAIT ON EXTERNAL EVENT (CONVERTIBLE and some others) {#idx18752}

INT 15 - VMiX - "sys_wake" - WAKE SLEEPING PROCESS {#idx18142}

INT 17 - 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. - INSTALLATION CHECK {#idx28619}

INT 1A - Intel Plug-and-Play AUTO-CONFIGURATION - GET DEFAULT CONFIG TABLE {#idx38779}{#idx38865}

INT 1A - PCI 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. v2.0c+ - READ CONFIGURATION DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. {#idx32966}

INT 1A - PCI 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. v2.0c+ - READ CONFIGURATION DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (DEC device) {#idx33397}

INT 1A - PCI 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. v2.0c+ - READ CONFIGURATION DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (Intel devices) {#idx35791}{#idx35794}{#idx35842}{#idx36346}{#idx36360}{#idx38016}

INT 1A - PCI 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. v2.0c+ - READ CONFIGURATION DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (PCIBM PC Technology devices) {#idx33482}

INT 1A - PCI 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. v2.0c+ - READ CONFIGURATION DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. (VIA Technologies devices) {#idx35236}{#idx35278}{#idx35288}

INT 1A - PCMCIA Socket Services v2.1 - GET ACCESS OFFSETS {#idx31783}

INT 1A - PCMCIA v2 Card Services - 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. {#idx32018}

INT 20 - Microsoft Windows - VDD - VxDA virtual device driver for Windows 3.x or 95. So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. SERVICES {protected mode} {#idx39956}{#idx39961}

INT 20 - Microsoft Windows - VMM - VxDA virtual device driver for Windows 3.x or 95. So called because nearly all of the Windows 3.0 drivers had names of the form "VdeviceD". See also device driver. SERVICES {protected mode} {#idx39613}

INT 21 - CD-ROM device driver - IOCTL INPUT {#idx46557}{#idx46638}{#idx47643}

INT 21 - LASTBYTE.SYS v1.19 - IOCTL - GET ??? TABLE {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.} {#idx46851}

INT 21 - Novell NetWare v4+ - GET LAN CONFIGURATION {#idx70765}

INT 2C - Cloaking - SET PORT-TRAPPING PASSALONG {protected mode} {#idx73629}

INT 2F - CATC USB4DOS Host Controller - ??? (POLLS VARIOUS I/O PORTS) {#idx90575}

INT 2F - Intel Plug-and-Play - CONFIGURATION MANAGER - GET ENTRY POINT {#idx80736}{#idx80742}

INT 2F - LapLink Quick Connect v6 - 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.} {#idx93492}

INT 2F - MODRES - INSTALLATION CHECK {#idx88454}

INT 2F - MS EMM386.EXE v4.46+ - INSTALL I/O VIRTUALIZATION HANDLER {#idx84861}

INT 2F - MS Windows - MX1501HAD - GET 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. ENTRY POINT {#idx81368}

INT 2F - MS Windows - VADMAD - GET 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. ENTRY POINT {#idx80877}

INT 2F - MS Windows - VMD - GET 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. ENTRY POINT {#idx80251}

INT 33 - Mouse Systems MOUSE DRIVER v7.01+ - CONFIGURE MOUSE??? {#idx99111}

INT 33 - TRUEDOX Mouse driver v4.01 - GET/SET HARDWARE PARAMETERS {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.} {#idx99298}

INT 61 - Atari Portfolio - PRESET/GET PERIPHERAL DATA {#idx109720}

INT 67 - QEMM-386 v4.23+ - 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.} {#idx115825}{#idx115945}{#idx115953}{#idx116049}{#idx116051}{#idx116054}{#idx116056}{#idx116059}{#idx116062}{#idx116072}{#idx116075}{#idx116078}{#idx116081}

INT 67 - RM386 - V86-MODE I/O PORTIBM PC Portable (uses same BIOS as XT) TRAPPING CONTROL {#idx116858}

INT 70 - IRQ8 - CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. REAL-TIME CLOCK {callout or callback} {#idx121698}

INT 71 - IRQ9 - REDIRECTED TO INT 0A BY 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. {callout or callback} {#idx121737}

INT 72 - IRQ10 - RESERVED {callout or callback} {#idx121765}

INT 73 - IRQ11 - RESERVED {callout or callback} {#idx121781}

INT 74 - IRQ12 - POINTING DEVICE (PSIBM PS/2, any model) {callout or callback} {#idx121802}

INT 75 - IRQ13 - MATH COPROCESSOR EXCEPTION (ATIBM PC AT and up) {callout or callback} {#idx121831}

INT 76 - IRQ14 - HARD DISK CONTROLLER OPERATION COMPLETE (ATIBM PC AT and later) {callout or callback} {#idx121859}

INT 77 - IRQ15 - RESERVED (ATIBM PC AT,PSIBM PS/2, any model) {callout or callback} {#idx121895}{#idx121912}{#idx121929}

INT 78 - TARGA.DEV - CMC International 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. device driver - SET I/O PORTIBM PC Portable (uses same BIOS as XT) {#idx122073}{#idx122088}

INT 78 - TARGA.DEV - GET I/O PORTIBM PC Portable (uses same BIOS as XT) {#idx122222}

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. - DLI 2.5+ - GET DRIVER INFO {#idx123818}{#idx123832}

INT 94 - Media Vision PCM.COM - CHECK BOARD ADDRESS {partially documented} {#idx127439}

INT E0 - CP/M-86One of the three operating systems offered by IBMInternational Busiuness Machines for its original PCIBM PC (the other two were MSDOS and the UCSD p-System). It has since evolved into DR-DOS version 6 and Novell DOS 7., Concurrent 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., DR Multiuser DOS - FUNCTION CALLS {#idx129882}

INT E6 - Linux DOSEMU - SET I/O PORTIBM PC Portable (uses same BIOS as XT) PERMISSIONS {#idx131796}

MEM 0040h:0065h - VIDEO - CURRENT MODE SELECT REGISTER {#idx161461}

MEM 0040h:0066h - VIDEO - CURRENT SETTING OF 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. PALETTE REGISTER {#idx161474}

MEM 0040h:0077h - FIXED DISK - I/O port offset {IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. documented only for XTIBM PC XT} {#idx161731}

MEM A000h:FF00h - S3 - MEM-MAPPED "SCENIC HIGHWAY" (Local Periph. Bus) ACCESS {#idx163616}

MEM xxxxh:xxx0h - Advanced Configuration and Power Interface Spec (ACPI) v0.9+ {#idx164099}{#idx164105}{#idx164107}{#idx164111}{#idx164115}{#idx164119}{#idx164122}{#idx164126}{#idx164127}

Notes {#idx132907}

Opcodes List {#idx174509}{#idx174513}{#idx174541}{#idx174546}{#idx174608}{#idx174612}{#idx174650}{#idx174655}{#idx174714}{#idx174719}{#idx174793}{#idx174798}{#idx174889}{#idx174894}{#idx175099}{#idx175142}{#idx175154}{#idx175179}

PORTIBM PC Portable (uses same BIOS as XT) 0022-0023 - CHIP SET DATA {#idx134205}

PORTIBM PC Portable (uses same BIOS as XT) 0024-0026 - PicoPower Vesuvius - V3-LS {#idx137590}

PORTIBM PC Portable (uses same BIOS as XT) 0024-0027 - PicoPower Vesuvius - V1-LS {#idx138028}

PORTIBM PC Portable (uses same BIOS as XT) 0080 - MANUFACTURING DIAGNOSTICS PORTIBM PC Portable (uses same BIOS as XT) {#idx140872}

PORTIBM PC Portable (uses same BIOS as XT) 00A8-00A9 - Via VT82C496G "Pluto" - CONFIGURATION REGISTERS {#idx141668}

PORTIBM PC Portable (uses same BIOS as XT) 0140-014F - 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. (alternate Small Computer System Interface) adapter {#idx142446}

PORTIBM PC Portable (uses same BIOS as XT) 0330-0333 - Adaptec 154xB/154xC 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. adapter (default address) {#idx145869}

PORTIBM PC Portable (uses same BIOS as XT) 03D6-03D7 - 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. (Color Graphics Adapter) - MIRRORS OF 03D4/03D5 {#idx150050}

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). NMIsee Non-Maskable Interrupt CONTROL {#idx151991}{#idx151996}

PORTIBM PC Portable (uses same BIOS as XT) 0800-08FF - I/O port access registers for extended CMOS RAMA small amount (typically 64 or 128 bytes) of memory in the system's real-time clock chip that is preserved by the clock's battery and is used for storing configuration information. See also Real-Time Clock. or SRAM(Static Random Access Memory) RAM which typically consists of one flip-flop per bit of memory. Unlike DRAMs, static RAM retains its contents as long as power is applied. Because there is no need to refresh the contents of memory addresses which are read, SRAM is faster than DRAM, but it is more expensive and typically is available in much smaller sizes than DRAM because each bit occupies more space on the chip. See also DRAM. {#idx152854}

PORTIBM PC Portable (uses same BIOS as XT) 0A79 - Plug-and-Play - WRITE DATA PORTIBM PC Portable (uses same BIOS as XT) {#idx152884}

PORTIBM PC Portable (uses same BIOS as XT) 46E8 - VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. - VIDEO ADAPTER ENABLE {#idx155498}

Ralf Brown Programs {#idx176906}

System-management mode {#idx166604}