INT 2F - MS Windows - GET 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. ENTRY POINT AX = 1684h BX = virtual device (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.) ID (see #02642) ES:DI = 0000h:0000h Return: ES:DI -> 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. 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, or 0:0 if the 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. does not support an 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. Note: some Windows enhanced-mode virtual devices provide services that applications can access. For example, the Virtual Display Device (VDD) provides an 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. used in turn by WINOLDAP. SeeAlso: AX=1684h/BX=0001h,AX=1684h/BX=0015h,AX=1683h,AX=4011h,INT 20"Windows" (Table 02642) Values for MS Windows 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. ID: Value Name CallOut V86see Virtual-86 Mode PM Description 0000h ACT200L ? ? ? IrDA Infrared ActiSys framer 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. 0000h ACT220L ? ? ? IrDA Infrared ActiSys 220 framer 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. 0000h ADAPTEC ? ? ? IrDA Infrared Adaptec framer 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. 0000h AM1500T ? N N (Win95) 0000h ATI ? N N (Win95) ATI display driver 0000h ATIPPCAP ? N Y ATI Rage128-based video card 0000h CDFS ? N N 0000h CDTSD ? N N (Win95) CD-ROM Type-Specific Driver 0000h CE2NDIS3 ? N N (W4Wg) 0000h CENDIS ? N N (W4Wg) 0000h CHIPS ? N N (Win95) Chips&Tech display driver 0000h CIRRUS ? N N (Win95) Cirrus display driver 0000h CTNDW ? N N (W4Wg) 0000h CTVSD ? N N (Win95) CD-ROM Vendor-Specific Driver 0000h CM2NDIS3 ? N N (W4Wg) 0000h COMBUFF ? N N (Win95) 0000h COMPAQ ? N N (Win95) Compaq display driver 0000h CPQNDIS3 ? N N (W4Wg) 0000h CRYSTAL ? ? ? IrDA Infrared Crystal framer 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. 0000h CWCENUM ? N N (Win95SR2???) 0000h CWCSPUD3 ? N N (Win95SR2???) 0000h DBKVSSD ? N N (Win95) Databook PCMCIA socket services??? 0000h DDOM95 ? N N 0000h DECLAN ? N N (W4Wg) 0000h DiskTSD ? N N (Win95) hard-disk Type-Specific Driver 0000h DiskVSD ? N N (Win95) hard-disk Vendor-Specific Driver 0000h DMICTVXD ? N N 0000h DMMDVDX ? N N Diamond MaximumDVD 0000h DRVSPACX ? N N (Win95) 0000h E30N3 ? N N (W4Wg) 0000h E31N3 N N (W4Wg) 0000h EE16 N N (W4Wg) 0000h 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). N N (Win95) 0000h EL59X N N (Win95) 0000h ELNK16 N N (W4Wg) 0000h ELNK3 N N (Win95) 0000h ELNKII N N (W4Wg) 0000h ELNKMC N N (W4Wg) 0000h ELPC3 N N (W4Wg) 0000h ENABLE2 N N (Win95) 0000h ENABLE4 N N (Win95) 0000h EPRO N N (Win95) 0000h ES1488V N N (Win95) 0000h ES1688V N N (Win95) 0000h ES488V N N (Win95) 0000h ES688V N N (Win95) 0000h ESI ? ? IrDA Infrared ESI framer 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. 0000h FILEMON N N DOS386 File Monitor 0000h FLS1MTD N N (Win95) flash-memory driver??? 0000h FLS2MTD N N (Win95) flash-memory driver??? 0000h HPEISA N N (W4Wg) 0000h HPFEND N N (W4Wg) 0000h HPISA N N (W4Wg) 0000h HPMCA N N (W4Wg) 0000h HSFLOP N N 0000h IBMTOK N N (W4Wg) 0000h IBMTOK4 N N (Win95) 0000h IRCOMM ? ? IrDA Infrared Virtual COM/LPTAbbreviation for Line PrinTer. driver 0000h IRLAMPEX ? ? IrDA Infrared Protocol 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. 0000h IRLAPFRM ? ? IrDA Infrared Virtual COM/LPTAbbreviation for Line PrinTer. frame driver 0000h IRMATRAK N N (W4Wg) 0000h JAVASUP N N Internet Explorer JAVA support 0000h KEYREMAP N N (Windows95 PowerToys) shift-key remapper 0000h LPTAbbreviation for Line PrinTer. N N N (Win4Workgroups 3.11) DOS386 LPTAbbreviation for Line PrinTer. Device 0000h LPTENUM ? N N 0000h MONVSD ? ? ? 0000h MGA ? N N (Win95) Matrox MGA display driver 0000h MSMINI ? N N (Win95) 0000h MSODISUP N N N (Win4Workgroups 3.11) MS ODI(Open Data-link Interface) A hardware-independent network interface developed by Novell, Inc. See also NDIS, Packet Driver. Support 0000h mvpas ? N N (Win95) Pro Audio Spectrum driver 0000h NECATAPI ? N N (Win95) 0000h NICE ? N N (Win95) 0000h NTI4CDR ? Y Y NTI CD-R/CD-RW 0000h NV3 ? N N (Win95SR2) 0000h NWNBLINK N N N (Win4Workgroups 3.11) Netware 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). 0000h OAK N N (Win95) Oak Tech display driver 0000h OCTK32 N N (W4Wg) 0000h OTCETH N N (W4Wg) 0000h PARALINK N N (Win95) 0000h PARALLAX ? ? IrDA Infrared Parallax framer 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. 0000h PCNTN3 N N (W4Wg) 0000h PE3NDIS N N (W4Wg) 0000h PPM N N (Win95) 0000h PROTEON N N (W4Wg) 0000h QEMMFix N N 0000h QIC117 N N (Win95) QIC-117 floppy-ctrl tape drive 0000h QPI N N QEMM Programming Interface (see INT 67/AH=3Fh) 0000h RMM N N Real-Mode Mapper for hw with real-mode drivers 0000h S3 N N (Win95) S3 display driver 0000h S3INFO N N 0000h S3MINI N N S3 display driver 0000h SAGE N N (Plus!) System Agent 0000h sage N N (Plus! for Win95) System Agent 0000h scsi1hlp N N (Win95) 0000h SERENUM N N 0000h SERIAL N N N (Win4Workgroups 3.11) DOS386 Serial Device 0000h SERWAVE ? N N 0000h SETP3 ? N N (Win95) Silicon Ethernet Pocket Adapter 0000h SLMSDENM ? Y Y 0000h SMARTVSD ? N N (EZ-SMART???) 0000h SMC8000W ? N N (W4Wg) 0000h SMC80PC ? N N (W4Wg) 0000h SMC8100W ? N N (W4Wg) 0000h SMC8232W ? N N (W4Wg) 0000h SMC9000 ? N N (W4Wg) 0000h SNIP ? N N (W4Wg) 0000h SOCKET ? N N (W4Wg) 0000h SOCKETSV ? N N (Win95) 0000h SPAP ? Y Y (Win95) 0000h SPENDIS ? N N (Win95) 0000h SRAMMTD ? N N (Win95) flash-memory driver??? 0000h STLTH64 ? N N Diamond Stealth64 driver 0000h STLTHMON ? N N 0000h T20N3 ? N N (W4Wg) 0000h T30N3 ? N N (W4Wg) 0000h TCTOK ? N N (W4Wg) 0000h TSENG ? N N (Win95) Tseng Labs display driver 0000h UBNEI ? N N (W4Wg) 0000h UNIMODEM ? ? ? (Win95) Universal Modem(contraction of MOdulator/DEModulator) Driver 0000h VDEF ? N N (Win95) 0000h VGATEWAY ? N Y (Win95) dialin gateway 0000h VIDEO7 ? N N (Win95) Video7 display driver 0000h VRomD ? N N (Win95) 0000h VStDspcD ? ? ? Quarterdeck Stealth D*Space 0000h VXDMON ? ? ? 0000h WD ? N N (Win95) 0000h WINTOP ? N N (Windows95 Power Toys) 0000h WSHTCP ? N N 0000h XGA(Extended Graphics Array) ? N N (Win95) XGA(Extended Graphics Array) display driver 0001h VMM ? N N Virtual MachineOne method for multitasking programs is to virtualize the CPU and other hardware, giving the appearance of sole possession of the system to each program being run. Such a virtualized environment is called a virtual machine. See also Virtual-86 Mode, Virtual DOS Machine. Manager 0001h VMM ? Y Y Windows95 Virtual MachineOne method for multitasking programs is to virtualize the CPU and other hardware, giving the appearance of sole possession of the system to each program being run. Such a virtualized environment is called a virtual machine. See also Virtual-86 Mode, Virtual DOS Machine. Manager 0002h Debug ? ? ? 0003h VPICD ? Y Y Virtual Prog. Interrupt Controller (PIC) Device 0004h VDMAD ? N N Virtual Direct Memory AccessA method whereby peripherals may transfer data into or out of main memory without the involvement of the CPU. (DMAsee Direct Memory Access) Device 0005h VTD ? Y Y Virtual Timer Device 0006h V86MMGR Y N N (Windows3.x) Virtual 8086 Mode Device 0006h V86MMGR ? N Y (Win95) Virtual 8068 Mode Device 0007h PageSwap ? N N Paging Device 0008h Parity ? N N Parity-check trapper 0009h Reboot ? N Y Ctrl-Alt-Del handler 000Ah VDD ? N Y Virtual Display Device (GRABBER) 000Bh VSD ? N N Virtual Sound Device 000Ch VMD Y Y Y Virtual Mouse Device 000Dh VKD ? N Y Virtual Keyboard Device 000Eh VCD ? N Y Virtual COMM Device 000Fh VPD ? N Y Virtual Printer Device 0010h VHD ? ? ? Virtual Hard Disk Device (Windows 3.0) 0010h BLOCKDEV Y N N Virtual Hard Disk Device (Windows 3.1) 0010h IOS N N N (Win4Workgroups 3.11) DOS386 IOS Device 0010h IOS ? Y Y Windows95 I/O Supervisor 0011h VMCPD ? Y Y (Windows3.x) Virtual Math CoProcessor Device 0011h VMCPD ? N Y (Win95) Virtual Math CoProcessor Device 0012h EBIOS ? N N Reserve EBIOS page (e.g., on PS/2IBM PS/2, any model) 0013h BIOSXLAT ? N N Map 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. 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. between prot & V86see Virtual-86 Mode mode 0014h VNETBIOS Y N N Virtual 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). Device 0015h DOSMGR Y Y N DOS data instancing (see #02656) 0016h WINLOAD ? ? ? 0017h SHELL ? N Y (Windows3) 0017h SHELL ? Y Y (Win95) 0018h VMPOLL Y N N 0019h VPROD ? ? ? 001Ah DOSNET ? N N assures network integrity across VMs 001Ah VNETWARE ? Y Y Novell NetWare DOSNET replacement 001Bh VFD ? N N Virtual Floppy Device 001Ch VDD2 ? ? ? Secondary display adapter 001Ch LoadHi ? N N Netroom LoadHi Device (RMLODHI.VXD) 001Ch LoadHi ? N N 386MAX LoadHi Device (386MAX.VXD) 001Ch LoadHi ? N N Win386 LoadHi Device (EMM386.EXE) 001Dh WINDEBUG ? N Y 001Dh TDDebug ? N Y 001Eh TSRLoad ? ? ? 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. instance utility 001Fh BiosHook ? ? ? 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. interrupt hooker 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. 0020h Int13 N N N 0021h PageFile Y N Y Paging File device 0022h 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. ? ? ? 0022h APIX ? N Y (Win95) 0023h MCA_POS ? ? ? Microchannel Programmable Option Select 0024h SCSIFD ? ? ? 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. FastDisk device 0025h VPEND ? ? ? Pen device 0026h APM ? ? ? Advanced Power Management 0026h VPOWERD ? Y Y (Win95) power management 0027h VXDLDR N Y Y (Win4Wg 3.11/Win95) VXD Loader 0028h NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com. See also Packet Driver, TCP/IP. N Y Y (Win4Wg 3.11) Network Driver Interface Spec 0029h ??? 002Ah VWIN32 ? N Y (Win95) 002Bh VCOMM N Y Y (Win4Workgroups 3.11) DOS386 VCOMM Device 002Ch SPOOLER ? N N Windows95 print spooler 002Dh W32S Y N Y WIN32s 32-bit extension to Windows 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. 002Eh ??? 002Fh ??? 0030h MACH32 N N Y ATI Mach32 video card 0031h NETBEUI N N N (Win4Workgroups 3.11) NETBEUI 0032h SERVER N Y Y (Win4Workgroups 3.11) Int21 File Server 0032h VSERVER ? N Y (Win95) Int21 File Server 0033h CONFIGMG ? Y Y (Win95) 0033h EDOS ? N N Windows DOS Box Enhancer by Mom's Software 0034h DWCFGMG.SYS ? Y ? DOS Plug-and-Play configuration manager 0035h SCSIPORT ? N N (Win95) virtualized access to 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 0036h VFBACKUP ? Y Y (Win95) 0037h ENABLE ? Y Y (Win95) 0038h VCOND ? Y Y (Win95) 0039h ??? 003Ah VPMTD N N Y (Win4Workgroups 3.11) IFAX Scheduler Device 003Bh DSVXD ? Y N DoubleSpace 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. from MS-DOS v6.x 003Ch ISAPNP ? N N (Win95) 003Dh 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. ? Y Y (Win95) 003Eh WSOCK ? Y Y (Win95) WinSock 003Fh WSIPX ? N N (Win95) IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. WinSock 0040h IFSMGR ? N N (Win95) 0041h VCDFSD ? N N (Win95) CD-ROM File System Driver (MSCDEX) 0042h MRCI2 ? N N (Win95) DriveSpace3 0043h PCI ? N N (Win95) 0048h PERF ? N N (Win95) 004Ah MTRR ? N N (Win95SR2) PPro/P-II MTRR enumerator??? 004Bh NTKERN ? N Y (Win95SR2) 0051h ISAPNP ? N N (Win95) ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. Plug-and-Play manager 008Dh ESDI_506 ? N N (Win95) MFM(Modified Frequency Modulation) A method of encoding data as a series of magnetic flux reversals on disk or tape, commonly known as double-density recording. In contrast to FM, modified frequency modulation omits all clock pulses except those between pairs of zero bits. See also FM, RLL./RLL(Run-Length Limited) A method of encoding data as a series of magnetic flux reversals on disk or tape. RLL can achieve higher data densities than MFM recording because it encodes the data such that (on average), fewer than one flux reversal per data bit is required (however, timing becomes more critical). RLL is actually an entire family of encoding methods, specified with two numbers indicating the minimum and maximum distances between one bits (flux transitions). The variant normally called RLL is RLL-2,7; RLL-1,7 and RLL-3,9 are also in use. MFM is in effect RLL-1,3. See also FM, MFM./ESDI(Enhanced Small Device Interface) A disk drive interface type which was briefly popular before IDE took over. An ESDI drive can transfer data between the drive and controller at 10, 15, or 20 megabits per second, which is faster than an MFM or RLL controller but slower than what is possible with an IDE or SCSI drive. See also IDE. disk driver 0090h voltrack ? N N (Win95) Volume Tracker 00FDh FAKEIDE ? N N (Chicago) 0102h CV1 ? N N Microsoft C/C++ 7.00+ CodeView for Windows 011Fh VFLATD ? N Y (Win95) 0200h VIPX ? Y Y NetWare Virtual IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. Driver 0200h VTEMPD ? ? ? dummy template driver by Ray Patch 0201h VNWLSERV ? N N NetWare Lite 1.1 Server (SERVER.EXE) 0202h WINICE ? Y Y SoftICE/W 0202h SICE ? Y Y 0203h VCLIENT ? N Y NetWare Lite 1.1+ Client 0205h VCAFT ? N N Novell Virtual CAFT Driver (LANalyzer for Win) 0205h BCW ? Y Y Nu-Mega Bounds Checker for Windows 0206h VTXRX ? N N Novell Virtual TXRX Driver (LANalyzer for Win) 0207h DPMSsee DOS Protected-Mode Services N Y N Novell DOS Protected ModeOne of the operating modes of the 80286 and higher Intel processors, in which addresses used by programs no longer correspond to physical addresses and the CPU enforces various protection mechanisms designed to prevent one program from disrupting other programs or the operating system. See also Real Mode, Virtual-86 Mode. Services 0234h VCOMMUTE ? Y Y PCIBM PC Tools Commute 0442h VTDAPI ? N Y MMSys Win386 VTAPI Device 0443h ??? 0444h VADMAD ? ? ? Autoinitialize DMAsee Direct Memory Access (Windows 3.0) 0445h VSBD ? Y Y WinResKit: Sound Blaster Device 0446h VADLIBD Y Y Y MMSys Win386 AdLib Device (v3.x) 0447h ??? 0448h SETULTRA ? ? ? Gravis UltraSound setup 0449h vjoyd ? N Y (Win95) joystick 044Ah mmdevldr ? Y Y (Win95) 044Bh ??? 044Ch msmpu401 ? N N (Win95) MPU-401 MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. driver 044Ch cwdmidi ? Y Y (Crystal???) MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. driver 044Dh msopl ? N N (Win95) OPL-3 (SoundBlaster FM(Frequency Modulation) A method of encoding data as a series of magnetic flux reversals on disk or tape, commonly known as single-density recording. In frequency modulation, a series of clock pulses are written at regular intervals, with one data bit for each clock pulse. See also MFM, RLL.) driver 044Eh mssblst ? N N (Win95) SoundBlaster MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. driver 045Dh VflatD ? N Y dva.386, part of WIN32s 045Eh ??? 045Fh mssndsys ? ? ? Microsoft Sound System audio driver 045Fh azt16 ? Y Y Aztech Sound Galaxy 16 audio driver 0460h UNIMODEM ? N Y Universal Modem(contraction of MOdulator/DEModulator) driver 0480h VNetSup N Y Y (Win4Workgrps 3.11) Virtual Network Support 0481h VRedir N N N (Win4Workgroups 3.11) Redirector File System 0481h VREDIR ? N N (Win95) Redirector File System driver 0482h VBrowse ? Y Y Win386 Virtual Browser 0482h SNAPVXD ? Y Y (Win95) 0483h VSHARE ? N N (Win4Workgroups) Virtual SHARE 0483h VSHARE ? Y Y (Win95) Virtual SHARE 0484h IFSMgr Y N Y (Win4Wg 3.11) Installable File SystemAn Installable File System which allows non-DOS format media to be used by DOS. In most ways, an IFS is very similar to a networked drive, although an IFS would typically be local rather than remote. See also INT 21h Function 52h. Manager 0485h ??? ??? 0486h VFAT N Y Y (Win4Workgroups 3.11) Win386 HPFS Driver 0487h NWLINK ? Y Y Win386 Virtual Packet Exchange Protocol 0487h NWSUP Y N N NetWare Vnetbios shim 0488h VTDI ? N N (Win95) 0489h VIP ? Y N (Win95) 0489h FTCVIP ? Y Y Frontier Technologies' VIP 048Ah VTCP ? Y ? 048Ah MSTCP ? Y N (Win95) TCP(Transmission Control Protocol) A higher level (session layer) of the TCP/IP protocol suite. See also IP, TCP/IP. stack 048Ah FTCTDI ? Y Y Future Technologies' TCP(Transmission Control Protocol) A higher level (session layer) of the TCP/IP protocol suite. See also IP, TCP/IP. stack 048Bh VCache N Y Y (Win4Workgroups 3.11) Virtual File CacheCaching is a method of increasing performance by keeping frequently-used data in a location which is more quickly accessed. The most common caches are disk caches (store disk sectors in RAM) and RAM caches (store portions of main memory in special high-speed RAM which may be accessed as fast as the CPU is capable of accessing memory). See also Delayed Write, Write-Through. 048Bh VCACHE ? Y Y (Win95) disk cache 048Ch ??? ??? 048Dh RASMAC ? Y Y enhanced mode Win4Workgroups RASMAC device 048Eh NWREDIR ? Y Y (Win95) 048Fh ??? ??? 0490h ??? ??? 0491h FILESEC ? ? ? (Win95) File Access Control Manager 0492h NWSERVER ? ? ? (Win95) 0493h SECPROV ? ? ? (Win95) Security Provider 0494h NSCL ? Y Y (Win95) 0495h AFVXD ? N N (Win95) 0496h NDIS2SUP ? ? ? (W4Wg???) NDIS2 networking support 0497h MSODISUP ? N N (W4Wg???) 0498h Splitter ? N N (Win95) 0499h PPPMAC ? Y Y (Win95) 049Ah VDHCP ? Y Y (Win95) 049Bh VNBT ? Y Y (Win95) NetBIOS-over-TCP/IP(Internet Protocol) The lower level (transport layer) of the TCP/IP protocol suite. See also TCP, TCP/IP. driver 049Ch ??? 049Dh LOGGER ? ? ? (Win95) 04A2h IRLAMP ? ? ? IrDA Infrared Enumerator 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. 097Ch PCCARD ? N Y (Win95) (see INT 20/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.=097Ch) 1020h VCV ? ? ? Microsoft C/C++ 7.00 CodeView 1021h VMB ? Y Y Microsoft C/C++ 7.00 WXSRVR 1022h Vpfd ? Y Y Microsoft C/C++ 7.00 1025h MMD ? Y Y Microsoft C/C++ 8.00, Visual C/C++ 1.00 2020h PIPE ? Y Y by Thomas W. Olson, in Windows/DOS DevJrn 5/92 21EAh VADLIBWD ? N Y Adlib Waveform Driver by John Ridges 2200h VFINTD ? Y Y Norton VFINTD (Norton Desktop) 22C0h ??? Y Rational Systems DOS/4GW ??? 2402h ZMAX ? N N Qualitas 386MAX v7 DOSMAX handler 24A0h VNSS ? N Y Norton Screen Saver (Norton Desktop) 24A1h VNDWD ? Y Y Norton VNDWD Device (Norton Desktop) 24A2h SYMEvent ? Y Y Norton Utilities v8 2540h VILD ? Y N INTERLNK client from MS-DOS v6.x 2640h VASBID ? N Y WinResKit: Artisoft Sounding Board Device 2860h COMMTASK N N Y Windows 386-mode preemptive tasker by James A. Kenemuth of Interabang Computing 28A0h PHARLAPX ? Y ? PharLap inter-VM communications DLLsee Dynamic Link Library 28A1h PharLap Y Y Y PharLap 386|DOS-Extender DOSXNT.386 28C0h VXD N Y Y Generic 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. for real and protected mode by Andrew Schulman in MSJ February 1993 28C1h PUSHKEYS ? ? ? VKD_Force_Keys device 28C2h VCR3D ? ? ? Virtual CR3, by A.Schulman in MSJ October 1992 2925h EDOS ? Y Y Enhanced DOS by Firefly Software 292Dh VSBPD ? Y Y Sound Blaster Pro 295Ah GRVSULTR ? Y Y Gravis UltraSound / UltraSound ACE 3048h FTCTCPIP ? N Y Frontier Technologies' TCP/IPThe protocol suite originally developed by DARPA for use on its ARPAnet network, which is now known as the Internet. See also IP, TCP. stack 3049h ??? (called by FNFSC32.VXD, FrontierTech's VNFSD) 304Ch DWCFGMG.SYS ? Y Plug-and-Play configuration access 3098h VstlthD N N N for QEMM Stealth ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. mode 3099h VVidramD ? Y N for QEMM VIDRAM support 30F6h WSVV ? N Y (Win95) WinSock for Voice-View Modems??? 310Eh WPS ? N Y MS DevNet CD-ROM: Windows Process Status 3110h VGSSD ? Y Y VSGLX16.386 for Aztech Sound Galaxy 16 313Bh PMC ? ? ? Power Management Coordinator 318Ah LMOUSE ? Y Y (Win95) Logitech mouse??? 31CFh STAT.386 ? ? ? Ton Plooy's processor statistics 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. 3202h VdspD ? N N (Win95) 3203h vpasd ? N N (Win95) Pro Audio Spectrum driver 32A4h SBAWE ? Y Y (Win95) SoundBlaster AWE driver 32A5h VSB16 ? N N (Win95) SoundBlaster 16 driver 32CBh VFRAD ? Y Y Dr.Franz - Simultan's diagnotics VFRAD.386 32DCh NV3RM ? N Y (Win95SR2) 3354h Discover ? N Y (Nuts&Bolts) Discover 33AAh DECCORE ? Y Y (Win95) DEC Pathworks core 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. 33B4h DECLICL ? N N (Win95) 33F0h VIWD ? Y Y Gravis UltraSound Plug-n-Play Interwave v1.x 33FCh ASPIENUM ? N N (Win95) 34DCh MAGNARAM ? N Y Quarterdeck MagnaRAM (MAGNA31.VXD/MAGNA95.VXD) 357Eh DSOUND ? Y Y (Win95) DirectSound 3584h VSNDSYS ? Y Y (Win95SR2) 35C5h LUGEPS ? Y Y Lugaru's Epsilon editor 36AEh AIB-PC.386 ? Y Y Sunset Laboratory interface hardware driver 377Bh MX1501HAD ? ? ? Cherry keyboard chipcard reader 38BEh Vheapx ? N Y (Nuts&Bolts) Virtual Heap Expander 38C0h Bombshel ? N Y (Nuts&Bolts) Bombshelter 38DAh VIWD ? Y Y UltraSound PnP InterWave driver v2.0beta 39E6h A3D ? N N (Win95SR2) 3A39h CINEMSYS ? Y Y Software Cinemaster MPEG/DVD decoder 3BFCh CWCSPUD ? N N (Win95SR2) 3BFDh CWCPROXY ? N N (Win95SR2) 3BFEh CWCMMSYS ? N Y (Win95SR2) 3BFFh CWCDSND ? N N (Win95SR2) 3C46h X10MOUSE ? Y Y X10 RF wireless mouse 3C78h VGARTD ? N N (Win95SR2) 3E6Dh DDRAW ? Y Y DirectDraw 3ED6h ATIVVXXX ? N Y ATI Rage128-based video card 3EE5h WINTEL.VXD ? ? ? "WinTel" Windows remote-control program (see also PORTIBM PC Portable (uses same BIOS as XT) 063Eh) 4321h POSTMSG ? Y Y (see #02712) 4321h VPCD ? N N PCache 4321h avvxp500 ? N N (Win95) VxP500 driver 6001h REGVXD ? Y Y Windows95 Registry Monitor helper 7A5Fh SIWVID Y Y Y Soft-ICE for Windows video driver 7FE0h VSWITCHD ? Y N by Jeff Prosise 7FE0h VWFD N Y Y reports windowed/fullscreen state; by Neil Sandlin of Microsoft, shipped with ANSIPLUS 7FE1h VWATCHD N Y Y basic driver w/ no functionality except tracing by Keith Jin of Microsoft PSS 7FE5h VFINTD N Y Y Virtual Floppy Interrupt trapper by Neil Sandlin of Microsoft 7FE7h VMPAGES N Y Y demonstration of exporting 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, by Neil Sandlin of Microsoft 7FE8h VPOSTD ? Y Y PostMessage() demo by Curtis J. Palmer of MS 7FE9h VIdleD N N N demonstration of Call_When_Idle function, by Bernie McIlroy of Microsoft 7FEBh VMIOD N N N Virtual Monitor I/O Traffic Device, by Neil Sandlin of Microsoft 7FEDh VMIRQD N N N Virtual Monitor IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. Traffic Device, by Neil Sandlin of Microsoft 8888h VbillD ? ? ? Bill Potvin II's for reversing Compaq LTE video EEEEh VEPSD ? N N Virtual Extended Paging Services for Borland C++ v4.0 Notes: The high bit of the 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. ID is reserved for future use. Originally, the next 10 bits were the 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. number which was assigned by Microsoft, and the low 5 bits were the device number. Currently, Microsoft assigns 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. IDs individually for each driver; send blank email to vxdid@microsoft.com for more information. "CallOut"=Y indicates that the 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. uses the INT 2F/AX=1607h/BX=VxDID device callout interface; "PM" and "V86see Virtual-86 Mode" indicate whether the 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. provides an 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 in protected mode and Virtual-86 mode (e.g. DOS boxes)