RBIL61 - Windows95

INT 15 - SYSTEM - GET CONFIGURATION (XTIBM PC XT >1986/1/10,ATIBM PC AT mdl 3x9,CONVIBM Convertible,XT286IBM PC XT/286,PSIBM PS/2, any model) {#idx22607}

INT 15 - SYSTEM - later PSIBM PS/2, any model/2s - RETURN MEMORY-MAP INFORMATION {#idx22918}

INT 19 - SYSTEM - BOOTSTRAP LOADER {#idx30229}{#idx30231}{#idx30248}

INT 20 - Microsoft Windows - FILESEC - 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} {#idx41253}

INT 20 - Microsoft Windows - MSSP / NWSP - 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} {#idx41276}

INT 20 - Microsoft Windows - NDIS(Network Driver Interface Specification) A hardware-independent network interface developed by Microsoft and 3com. See also Packet Driver, TCP/IP. - 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} {#idx40451}

INT 20 - Microsoft Windows - NWLINK - 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} {#idx41154}

INT 20 - Microsoft Windows - PPPMAC - 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} {#idx41347}

INT 20 - Microsoft Windows - REBOOT - 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} {#idx39935}

INT 20 - Microsoft Windows - SPOOLER - 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} {#idx40567}

INT 20 - Microsoft Windows - VCD - 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} {#idx40040}

INT 20 - Microsoft Windows - VCOND - 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} {#idx40849}{#idx40852}

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} {#idx39964}

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} {#idx39847}

INT 20 - Microsoft Windows - VIP - 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} {#idx41176}

INT 20 - Microsoft Windows - VKD - 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} {#idx40029}

INT 20 - Microsoft Windows - VMD / VMOUSE - 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} {#idx40004}

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} {#idx39740}

INT 20 - Microsoft Windows - VREDIR - 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} {#idx41129}

INT 20 - Microsoft Windows - VTDI - 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} {#idx41165}

INT 20 - Microsoft Windows - WSOCK - 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} {#idx40876}

INT 21 - CD-ROM device driver - IOCTL INPUT {#idx46374}{#idx46415}

INT 21 - CD-ROM device driver - IOCTL OUTPUT {#idx47861}

INT 21 - DOS 1+ - CREATE NEW PROGRAM SEGMENT PREFIX {#idx43544}

INT 21 - DOS 1+ - FIND FIRST MATCHING FILE USING FCBsee File Control Block {#idx41920}{#idx41940}{#idx41955}{#idx41984}

INT 21 - DOS 2+ - "EXEC" - LOAD AND/OR EXECUTE PROGRAM {#idx50375}

INT 21 - DOS 2+ - GET DOS VERSION {#idx44089}{#idx44093}

INT 21 - DOS 2+ - GET FILE'S LAST-WRITTEN DATE AND TIME {#idx52186}

INT 21 - DOS 2+ - IOCTL - GET INPUT STATUS {#idx48661}

INT 21 - DOS 2+ - SET FILE'S LAST-WRITTEN DATE AND TIME {#idx52198}{#idx52199}

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.} {#idx51094}{#idx51103}{#idx51568}

INT 21 - DOS 2+ internal - TRANSLATE 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. PARAMETER BLOCK TO DRIVE PARAM BLOCK {#idx52023}{#idx52024}

INT 21 - DOS 3.0+ - "TRUENAME" - CANONICALIZE FILENAME OR PATH {#idx55166}{#idx55182}{#idx55189}

INT 21 - DOS 3.1+ - IOCTL - CHECK IF BLOCK DEVICE REMOTE {#idx48730}

INT 21 - DOS 3.2+ - IOCTL - GENERIC BLOCK DEVICE REQUEST {#idx49116}{#idx49150}

INT 21 - DOS 4.0+ internal - GET/SET DISK SERIAL NUMBER {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.} {#idx55755}

INT 21 - DOS 4.x only - SET EXTENDED ATTRIBUTES {#idx52305}

INT 21 - DOS 5+ - GET TRUE VERSION NUMBER {#idx44505}

INT 21 - IFSHLP.SYS - GET ENTRY POINT {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.} {#idx45452}

INT 21 - MS-DOS 7 (Windows95) - GET/SET INTERNATIONALIZATION INFORMATION {#idx55998}

INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK LOGICAL VOLUME {#idx49267}

INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - LOCK PHYSICAL VOLUME {#idx49300}

INT 21 - MS-DOS 7.0+ - GENERIC IOCTL - UNLOCK LOGICAL VOLUME {#idx49320}

INT 21 - MS-DOS 7/Windows95 - GET CREATION DATE AND TIME {#idx52327}{#idx52334}

INT 21 - MS-DOS 7/Windows95 - SET CREATION DATE AND TIME {#idx52341}

INT 21 - MS-DOS 7/Windows95 - SET LAST ACCESS DATE AND TIME {#idx52315}{#idx52320}

INT 21 - Windows95 (OSR2) - SET GENERAL INTERNATIONALIZATION INFO {#idx55438}

INT 21 - Windows95 - FAT32 - "Get_ExtDPB" - GET EXTENDED DPBsee Drive Paramter Block {#idx56512}{#idx56515}

INT 21 - Windows95 - FAT32 - EXTENDED ABSOLUTE DISK READ/WRITE {#idx56637}

INT 21 - Windows95 - FAT32 - GET EXTENDED FREE SPACE ON DRIVE {#idx56562}{#idx56572}

INT 21 - Windows95 - FAT32 - Set DPBsee Drive Paramter Block TO USE FOR FORMATTING {#idx56603}

INT 21 - Windows95 - internal - LONG FILENAME - FIND NEXT MATCHING 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.} {#idx56366}

INT 21 - Windows95 - internal {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.} {#idx56381}{#idx56386}{#idx56391}

INT 21 - Windows95 - LONG FILENAME - "FindClose" - TERMINATE DIRECTORY SEARCH {#idx56347}

INT 21 - Windows95 - LONG FILENAME - "TRUENAME" - CANONICALIZE PATH {#idx56243}{#idx56259}

INT 21 - Windows95 - LONG FILENAME - CHANGE DIRECTORY {#idx56139}

INT 21 - Windows95 - LONG FILENAME - CREATE OR OPEN FILE {#idx56300}{#idx56308}{#idx56312}

INT 21 - Windows95 - LONG FILENAME - CREATE SUBST {#idx56457}

INT 21 - Windows95 - LONG FILENAME - DELETE FILE {#idx56145}

INT 21 - Windows95 - LONG FILENAME - DOS TIME TO FILE TIME {#idx56424}

INT 21 - Windows95 - LONG FILENAME - EXTENDED GET/SET FILE ATTRIBUTES {#idx56155}

INT 21 - Windows95 - LONG FILENAME - FILE TIME TO DOS TIME {#idx56415}

INT 21 - Windows95 - LONG FILENAME - FIND FIRST MATCHING FILE {#idx56182}{#idx56198}{#idx56200}{#idx56210}{#idx56215}

INT 21 - Windows95 - LONG FILENAME - FIND NEXT MATCHING FILE {#idx56221}

INT 21 - Windows95 - LONG FILENAME - GENERATE SHORT FILENAME {#idx56432}{#idx56436}

INT 21 - Windows95 - LONG FILENAME - GET CANONICAL LONG FILENAME OR PATH {#idx56278}{#idx56289}

INT 21 - Windows95 - LONG FILENAME - GET CURRENT DIRECTORY {#idx56172}

INT 21 - Windows95 - LONG FILENAME - GET FILE INFO BY HANDLE {#idx56397}{#idx56402}

INT 21 - Windows95 - LONG FILENAME - GET SHORT (8.3) FILENAME FOR FILE {#idx56267}

INT 21 - Windows95 - LONG FILENAME - GET VOLUME INFORMATION {#idx56326}

INT 21 - Windows95 - LONG FILENAME - MAKE DIRECTORY {#idx56125}

INT 21 - Windows95 - LONG FILENAME - QUERY SUBST {#idx56477}

INT 21 - Windows95 - LONG FILENAME - REMOVE DIRECTORY {#idx56132}

INT 21 - Windows95 - LONG FILENAME - RENAME FILE {#idx56237}

INT 21 - Windows95 - LONG FILENAME - SERVER CREATE OR OPEN FILE {#idx56444}

INT 21 - Windows95 - LONG FILENAME - TERMINATE SUBST {#idx56467}

INT 21 - Windows95 - LONG FILENAME FUNCTIONS {#idx56052}

INT 21 - Windows95 - RESET DRIVE {#idx56115}

INT 21 - Windows95 - SET/CLEAR DOS_FLAG {#idx44564}

INT 21 - Windows95 beta - LFN-FindClose {#idx56488}{#idx56494}

INT 2F - CD-ROM - ABSOLUTE DISK READ {#idx79104}

INT 2F - CD-ROM - GET DRIVE DEVICE LIST {#idx79027}

INT 2F - CD-ROM v2.00+ - GET MSCDEX.EXE VERSION (GET VERSION) {#idx79152}

INT 2F - CD-ROM v2.10+ - SEND DEVICE DRIVER REQUEST {#idx79265}

INT 2F - MS Windows - ENABLE.VXD - 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 {#idx80911}

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 {#idx79908}{#idx79944}{#idx79949}{#idx79979}{#idx80038}{#idx80242}

INT 2F - MS Windows - NSCL - 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 {#idx81178}{#idx81181}

INT 2F - MS Windows - NWREDIR - 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 {#idx81172}

INT 2F - MS Windows - SERVER / VSERVER - 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 {#idx80819}

INT 2F - MS Windows - SHELL - 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 {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.} {#idx80579}{#idx80581}

INT 2F - MS Windows - VFBACKUP - 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 {#idx80898}

INT 2F - MS Windows - VMCPD - 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 {#idx80486}

INT 2F - MS Windows - VSHARE - 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 {#idx81114}

INT 2F - MS Windows - WINDOWS ENHANCED MODE & 286 DOSX INIT BROADCAST {callout or callback} {#idx79364}

INT 2F - MS Windows - WINDOWS ENHANCED MODE INSTALLATION CHECK {#idx79307}

INT 2F - MS Windows 3+ - WIN.COM - SET PROGRAM TO EXECUTE ON EXIT {#idx85222}

INT 2F - MS Windows 3.1 - DETECT ROMs {#idx79712}

INT 2F - MS Windows 3.1 - IDENTIFY WINDOWS VERSION AND TYPE {#idx79681}

INT 2F - MS Windows 3.11 - VXDLDR - 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 {#idx81157}

INT 2F - MS Windows/386 2.x - 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 {#idx79319}

INT 2F - MS Windows95 - "VKD" VIRTUAL DEVICE - ??? CALLOUT {callout or callback} {#idx79468}

INT 2F - MS Windows95 - V86MMGR - 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} {#idx80309}

INT 2F - MS Windows95 - VMM - 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 {#idx80269}{#idx80279}

INT 2F - MS Windows95 - VXDLDR - 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 {#idx80716}

INT 2F - MS-DOS 7 kernel - GET SYSTEM.DAT (REGISTRY FILE) PATHNAME {#idx79777}

INT 2F - MS-DOS 7 kernel - SET SYSTEM.DAT (REGISTRY FILE) PATHNAME {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.} {#idx79788}

INT 2F - Windows95 - ??? {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.} {#idx85034}{#idx85039}

INT 2F - Windows95 - CHECK MS-DOS VERSION 7 {#idx85049}

INT 2F - Windows95 - CLOSE 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.} {#idx85027}

INT 2F - Windows95 - CLOSE-AWARENESS - ACKNOWLEDGE CLOSE {#idx81756}

INT 2F - Windows95 - CLOSE-AWARENESS - CANCEL CLOSE {#idx81767}

INT 2F - Windows95 - CLOSE-AWARENESS - ENABLE/DISABLE CLOSE COMMAND {#idx81734}

INT 2F - Windows95 - CLOSE-AWARENESS - QUERY CLOSE {#idx81745}

INT 2F - Windows95 - DOS KERNEL - (DE)ALLOCATE HMAsee High Memory Area MEMORY BLOCK {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.} {#idx84361}

INT 2F - Windows95 - DOS KERNEL - GET START OF HMAsee High Memory Area MEMORY CHAIN {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.} {#idx84373}{#idx84378}

INT 2F - Windows95 - FIND SFTsee System File Table ENTRY IN INTERNAL FILE TABLES {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.} {#idx78006}

INT 2F - Windows95 - 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.} {#idx85004}

INT 2F - Windows95 - PATCH ??? {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.} {#idx85043}

INT 2F - Windows95 - SAVE32.COM - INSTALLATION CHECK {#idx79794}{#idx79801}

INT 2F - Windows95 - SET/CLEAR "REPORT WINDOWS TO DOS PROGRAMS" FLAG {undocumentedInformation about a product which is not publicly available from the manufacturer, and must be determined by reverse-engineering (disassembly, trial-and-error, etc.). Undocumented information tends to change -- often dramatically -- between successive revisions of a product, since the manufacturer has no obligation to maintain compatibility in behavior which is not explicitly stated.} {#idx78025}{#idx78035}

INT 2F - Windows95 - TITLE - GET APPLICATION TITLE {#idx81713}

INT 2F - Windows95 - TITLE - GET VIRTUAL MACHINE TITLE {#idx81721}

INT 2F - Windows95 - TITLE - SET APPLICATION TITLE {#idx81684}

INT 2F - Windows95 - TITLE - SET VIRTUAL MACHINE TITLE {#idx81697}

INT 2F - Windows95 - WIN.COM - GET NESTING LEVEL {#idx85227}

INT 2F - Windows95 - WRITE TO 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.} {#idx85012}