RBIL61 - UNLOCK

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/26h - ITT VPX 32xx - FP - Crystal Oscillator Line-Locked Mode {#idx170702}

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/01h - Philips SAA7110(A) ONE-CHIP FRONT-END - HSY BEGIN 50 Hz {#idx172003}

INT 10 - VIDEO - SCREENR v1.55+ - 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. {#idx5155}

INT 13 - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911./MS INT 13 Extensions - LOCK/UNLOCK DRIVE {#idx10484}{#idx10490}{#idx10491}{#idx10497}

INT 13 - QUICKCACHE II v4.20 - SECTOR LOCKING {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.} {#idx10286}

INT 15 - DESQview/X 1.02+ - DVDOS4GX.DVR - UNLOCK ??? MAILBOX {#idx21525}

INT 15 - TopViewTopView, DESQview, TaskView, OmniView, other compatibles - SEND MESSAGE - "CLOSE" - CLOSE OBJECT {#idx17578}

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 {#idx28657}

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. {#idx31938}

INT 20 - Microsoft Windows - CONFIGMG - 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} {#idx40632}

INT 20 - Microsoft Windows - DWCFGMG.SYS - 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} {#idx40761}{#idx40762}

INT 20 - Microsoft Windows - IFSMgr - 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} {#idx40947}

INT 20 - Microsoft Windows - VDMAD - 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} {#idx39816}{#idx39823}{#idx39824}

INT 20 - Microsoft Windows - VFBACKUP - 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} {#idx40781}

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} {#idx39578}

INT 21 - CD-ROM device driver - IOCTL INPUT {#idx46443}

INT 21 - CD-ROM device driver - IOCTL OUTPUT {#idx47874}

INT 21 - DOS 2+ internal - "SYSVARS" - GET LIST OF LISTS {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.} {#idx51399}

INT 21 - DOS 3.0+ - "FLOCK" - RECORD LOCKING {#idx52890}{#idx52900}

INT 21 - DOS 3.2+ - IOCTL - GENERIC BLOCK DEVICE REQUEST {#idx48954}{#idx49012}{#idx49017}{#idx49160}

INT 21 - DOS 4.x only - internal - GET DOS SWAPPABLE DATA AREAS {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.} {#idx53393}{#idx53394}

INT 21 - LANstep - ??? {#idx58254}

INT 21 - LANtastic - GET ACTIVE USER INFORMATION {#idx54906}

INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK LOGICAL VOLUME {#idx49309}

INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK PHYSICAL VOLUME {#idx49334}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR FILE {#idx63005}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR LOGICAL RECORD {#idx58369}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR LOGICAL RECORD SET {#idx58384}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR PHYSICAL RECORD {#idx57771}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - CLEAR PHYSICAL RECORD SET {#idx57901}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE {#idx62961}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE FILE SET {#idx58217}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE LOGICAL RECORD {#idx58335}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE LOGICAL RECORD SET {#idx58356}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE PHYS RECORD SET {#idx57883}

INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - RELEASE PHYSICAL RECORD {#idx57756}

INT 21 - Novell NetWare - WORKSTATION - END OF JOB {#idx58418}

INT 21 - Novell NetWare, Alloy NTNX - CLEAR FILE (FCBsee File Control Block) {obsolete} {#idx58235}

INT 21 - Novell NetWare, Alloy NTNX - CLEAR RECORD (FCBsee File Control Block) {obsolete} {#idx57854}

INT 21 - Novell NetWare, Alloy NTNX - RELEASE FILE (FCBsee File Control Block) {obsolete} {#idx58199}

INT 21 - Novell NetWare, Alloy NTNX - RELEASE RECORD (FCBsee File Control Block) {obsolete} {#idx57810}

INT 21 - OS/386 VMM - UNLOCK MEMORY PAGES {#idx62949}

INT 21 - Phar Lap 386/DOS-Extender - VIRTUAL MEMORY MANAGEMENT - PAGE LOCKING {protected mode} {#idx43030}

INT 21 - Phar Lap 386/DOS-Extender VMM - UNLOCK PAGES {protected mode} {#idx42718}{#idx42724}

INT 21 - SMARTDRV.SYS v3.x only - IOCTL - CACHE CONTROL {#idx47811}

INT 2D - RATSR 2.0+ - GET STATUS {#idx74217}

INT 2E - Windows NT - 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} {#idx74935}{#idx74937}

INT 2F - EXTENDED MEMORY SPECIFICATION (XMSsee Extended Memory Specification) v2+ - GET DRIVER ADDRESS {#idx83491}{#idx83495}{#idx83580}

INT 2F - HIMEM.SYS v3.09+ - GET XMSsee Extended Memory Specification HANDLE 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.} {#idx83376}

INT 2F - Intel Plug-and-Play - CONFIGURATION MANAGER - GET ENTRY POINT {#idx80857}{#idx80858}

INT 2F - IOMEGA DRIVERS - UNLOCK MEDIA IN DRIVE / EJECT {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.} {#idx86004}{#idx86006}

INT 2F - JAM.SYS v1.10+ - "UnLock" - UNLOCK COMPRESSED DRIVE {#idx85495}{#idx85497}{#idx85501}{#idx85506}

INT 2F - MS Windows - VFLATD - 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 {protected mode} {#idx80959}

INT 2F - NETWORK REDIRECTOR (DOS 3.x only) - LOCK REGION OF 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.} {#idx76648}{#idx76650}

INT 2F - NETWORK REDIRECTOR (DOS 3.x only) - UNLOCK REGION OF 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.} {#idx76668}

INT 2F - Novell DOS 7 - EMM386.EXE - MULTITASKING 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. - MEMORY {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.} {#idx82779}{#idx82781}{#idx82784}{#idx82795}{#idx82796}{#idx82798}

INT 2F - Novell DOS 7 - EMM386.EXE - MULTITASKING 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. - SUPERVISOR MODULE {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.} {#idx82630}

INT 31 - CauseWay - "UnLockMem" - UNLOCK REGION OF MEMORY {protected mode} {#idx98174}{#idx98177}{#idx98184}

INT 31 - CauseWay - "UnLockMem32" - UNLOCK REGION OF MEMORY (32-bit) {protected mode} {#idx98188}{#idx98192}{#idx98200}

INT 31 - CauseWay - "UnLockMemNear" - UNLOCK APP-RELATIVE MEMORY REGION {protected mode} {#idx98217}{#idx98221}{#idx98228}

INT 31 - DPMIsee DOS Protected-Mode Interface 0.9+ - ALLOCATE MEMORY BLOCK {protected mode} {#idx97249}

INT 31 - DPMIsee DOS Protected-Mode Interface 0.9+ - GET FREE MEMORY INFORMATION {protected mode} {#idx97228}{#idx97231}

INT 31 - DPMIsee DOS Protected-Mode Interface 0.9+ - MARK REAL MODE REGION AS PAGEABLE {protected mode} {#idx97480}{#idx97483}

INT 31 - DPMIsee DOS Protected-Mode Interface 0.9+ - UNLOCK LINEAR REGION {protected mode} {#idx97454}{#idx97461}{#idx97465}

INT 31 - DPMIsee DOS Protected-Mode Interface 0.9+ - UNLOCK SELECTOR {protected mode} {#idx96608}{#idx96610}

INT 4A - TI Professional PCIBM PC - KEYBOARD - SEND COMMAND TO KEYBOARD {#idx101446}

INT 4B - Virtual DMA SpecificationA set of interrupt calls which permit the use of DMA even on systems running in protected or Virtual-86 mode with their address remapping, or systems such as Micro Channel PSIBM PS/2, any model/2s with multiple bus masters independently performing DMA operations. - SCATTER/GATHER UNLOCK REGION {#idx101726}

INT 4F - Common Access Method 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. interface rev 2.3 - SEND CCB TO XPT/SIM {#idx102320}

INT 60 - 3com, 10NET, Banyan VINES - UNLOCK {#idx107125}

INT 60 - HP 95LX System Manager - "M_UNLOCK" - ALLOW TASK SWITCHES {partially documented} {#idx105250}

INT 61 - Banyan VINES - 3270 INTERFACE {#idx107914}

INT 67 - PC-NET, Alloy NTNX - UNLOCK SEMAPHORE {#idx115810}

INT 6F - 10NET - UNLOCK FCBsee File Control Block {#idx121180}

INT 6F - 10NET - UNLOCK HANDLE {#idx120745}{#idx120752}

INT 6F - 10NET - UNLOCK SEMAPHORE {#idx120931}

INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_LOCK" - RESERVE SUB-ADDRESSES {#idx120138}

INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_UNLOCK" - RELEASE SUB-ADDRESSES {#idx120191}

INT 78 - HugeRealMode Driver - GET ENTRY POINT {#idx122256}

INT 7B - Btrieve 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. (single user) {#idx123514}{#idx123518}

INT 7F - Alloy NTNX (Host) - LOCK/UNLOCK SYSTEM, SPOOLER CONTROL {#idx125042}{#idx125052}

INT 7F - Alloy NTNX - UNLOCK FILE FOR USER {#idx125809}{#idx125816}{#idx125822}

INT 7F - Alloy NTNX, MW386 - ACKNOWLEDGE DATAGRAM {#idx125501}

INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - RELEASE BUFFER {#idx125410}

INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK ALL LOCKED IDLE CHANNELS {#idx125439}{#idx125446}

INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK CHANNEL {#idx125392}

INT 7F - Alloy NTNX, MW386 - CHANNEL CONTROL - UNLOCK MULTIPLE CHANNELS {#idx125463}{#idx125467}{#idx125471}

INT 7F - Alloy NTNX, MW386 - SEMAPHORE LOCK AND WAIT {#idx124575}

INT 7F - HLLAPI (IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. 3270 High-Level Language 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.)/LLAPI (Rabbit 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.) {#idx124675}{#idx124718}

INT E0 - ConcCP/MConcurrent CP/M by Digital Research, now DR Multiuser DOS,DR Multiuser DOS - EXECUTE DOS-COMPATIBLE FUNCTIONS {real mode} {#idx130571}{#idx130636}{#idx130637}

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 {#idx129731}{#idx129824}

MEM 0040h:00DFh - 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) LOCK STATE {#idx162898}

MEM 80C0h:0000h - COMPAQ DIAGNOSTICS REGISTER {#idx163143}{#idx163156}

MEM A000h:8100h - S3 - MEMORY-MAPPED PACKED REGISTERS {#idx163362}

Opcodes List {#idx174706}{#idx174711}{#idx174883}{#idx175305}{#idx175359}

PORTIBM PC Portable (uses same BIOS as XT) 0022-0025 - INTEL 82360SL CHIPSET (FOR 386SL) {#idx137540}

PORTIBM PC Portable (uses same BIOS as XT) 0028-002A - 80486 "Deep Green" motherboard - ??? {#idx139048}

PORTIBM PC Portable (uses same BIOS as XT) 0060-006F - KEYBOARD CONTROLLER 804x (8041, 8042) (or PPI (8255) on PCIBM PC,XTIBM PC XT) {#idx139455}

PORTIBM PC Portable (uses same BIOS as XT) 0090-009F - PS/2IBM PS/2, any model - POS (PROGRAMMABLE OPTION SELECT) {#idx141301}

PORTIBM PC Portable (uses same BIOS as XT) 0170-0176 - OPTi "Vendetta" (82C750) CHIPSET - 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 {#idx142915}

PORTIBM PC Portable (uses same BIOS as XT) 01F0-01F6 - OPTi "Vendetta" (82C750) CHIPSET - PRIMARY 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 {#idx143490}

PORTIBM PC Portable (uses same BIOS as XT) 01F0-01F7 - HDC 1 (1st Fixed Disk Controller) (ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA., 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).) {#idx143142}{#idx143158}{#idx143168}

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) {#idx145970}

PORTIBM PC Portable (uses same BIOS as XT) 03C4-03C5 - 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. - SEQUENCER REGISTERS {#idx148432}

PORTIBM PC Portable (uses same BIOS as XT) 03CE-03CF - 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. - GRAPHICS CONTROLLER REGISTERS {#idx148917}

PORTIBM PC Portable (uses same BIOS as XT) 03D4-03D5 - COLOR VIDEO - CRT CONTROL REGISTERS {#idx149347}{#idx149357}

PORTIBM PC Portable (uses same BIOS as XT) 03F0-03F1 - PCTech RZ1000 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 {#idx151810}

PORTIBM PC Portable (uses same BIOS as XT) 03F0-03F7 - FDC 1 (1st Floppy Disk Controller) second FDC at 0370 {#idx151788}{#idx151799}