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23/4/2016 PC DOS Retro

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PC DOS Retro by Vernon Brooks

Information and history about PC DOS and MS-DOS

List of DOS commandsList of DOS CONFIG.SYS commandsList of DOS device driversList of DOS functionsList of DOS tables and structuresList of DOS multiplex (INT 2Fh) functionsList of standard  DOS environment variablesDOS version informationDOS API notesHistory of DOS

DOS utilities and stuff 

Detailed list of changes I made as the lead developer of PC DOS 7

Patches for PC DOS 7 system files to reduce conventional memory usagePC  DOS 7 Technical Update - the official technical refer ence for PC DOS 7PC  DOS disk listingsEvolution of the DOS INT 21h function dispatcher Information about the DOS SYSVARS tableInformation about removed DOS INT 21h functionsInformation about the little known multitasking MS-DOS 4.0

 Analysis of PC DOS 2000 Y2K differences from PC DOS 7Enhanced DEBUG for PC DOS and MS-DOSHLTIDLE - reduce CPU power usage in DOSBOOTLDR - simple MBR boot loader which allows  booting from any valid partition

IBM PC BIOS source code reconstructionInf ormationIBM PC BIOS version historyIBM PC BIOS - all 3 versions (dated 04/24/81, 10/19/81, 10/27/82)IBM PC XT BIOS version 1 (dated 11/08/82)IBM PC XT BIOS version 2 (dated 01/10/86)IBM PC XT BIOS version 3 (dated 05/09/86)IBM PC AT BIOS version 1 (dated 01/10/84)IBM PC AT BIOS version 2 (dated 06/10/85)IBM PC AT BIOS version 3 (dated 11/15/85)IBM PC XT 286 BIOS (dated 04/21/86)

Related specs and inf ormation

BIOS functionsBIOS data areaKeyboard scan code/character code combinationsList of PC interrupts80x86 instruction referenceOfficial Expanded Memory Specification (EMS) documentation: version 3.2  - version 4.0Official eXtended Memory Specification (XMS) documentation: version 2.0  - version 3.0Official Virtual Control Program Interface (VCPI) documentation: version 1.0Official Virtual DMA Services (VDS) documentation: version 1.0

Official DOS Protected Mode Interface (DPMI) documentation: version 0.9  - version 1.0Microsoft FAT (File Allocation Table) file system documentationMicrosoft CD-ROM Extensions (MSCDEX) documentationRelocatable Object Module Format (OMF) documentationMicrosoft Macro Assembler (MASM) version historyMicrosoft C compiler version history

https://sites.google.com/site/pcdosretro/masmhisthttps://sites.google.com/site/pcdosretro/masmhisthttps://sites.google.com/site/pcdosretro/masmhisthttps://sites.google.com/site/pcdosretro/mscdex21.txt?attredirects=0https://sites.google.com/site/pcdosretro/80x86refhttps://sites.google.com/site/pcdosretro/pcinterruptshttps://sites.google.com/site/pcdosretro/scancodeshttps://sites.google.com/site/pcdosretro/biosdatahttps://sites.google.com/site/pcdosretro/ATBIOSV2.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/XTBIOSV3.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/XTBIOSV2.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/PCBIOS.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/ibmbioshisthttps://sites.google.com/site/pcdosretro/ibmpcbioshttps://sites.google.com/site/pcdosretro/hltidlehttps://sites.google.com/site/pcdosretro/enhdebughttps://sites.google.com/site/pcdosretro/pcdos2000diffshttps://sites.google.com/site/pcdosretro/multitaskingdos4https://sites.google.com/site/pcdosretro/disklistingshttps://sites.google.com/site/pcdosretro/dospatcheshttps://sites.google.com/site/pcdosretro/dosmodshttps://sites.google.com/site/pcdosretro/doshisthttps://sites.google.com/site/pcdosretro/dosapinoteshttps://sites.google.com/site/pcdosretro/dosverhttps://sites.google.com/site/pcdosretro/envvarhttps://sites.google.com/site/pcdosretro/dosint2fhttps://sites.google.com/site/pcdosretro/dosfuncshttps://sites.google.com/site/pcdosretro/commandshttps://sites.google.com/site/pcdosretro/mschisthttps://sites.google.com/site/pcdosretro/masmhisthttps://sites.google.com/site/pcdosretro/omf.pdf?attredirects=0https://sites.google.com/site/pcdosretro/mscdex21.txt?attredirects=0https://sites.google.com/site/pcdosretro/fatgen.pdf?attredirects=0https://sites.google.com/site/pcdosretro/dpmispec1.pdf?attredirects=0https://sites.google.com/site/pcdosretro/dpmispec.txt?attredirects=0https://sites.google.com/site/pcdosretro/vds.txt?attredirects=0https://sites.google.com/site/pcdosretro/vcpi.txt?attredirects=0https://sites.google.com/site/pcdosretro/xms30.txt?attredirects=0https://sites.google.com/site/pcdosretro/xms20.txt?attredirects=0https://sites.google.com/site/pcdosretro/ems40.txt?attredirects=0https://sites.google.com/site/pcdosretro/ems32.txt?attredirects=0https://sites.google.com/site/pcdosretro/80x86refhttps://sites.google.com/site/pcdosretro/pcinterruptshttps://sites.google.com/site/pcdosretro/scancodeshttps://sites.google.com/site/pcdosretro/biosdatahttps://sites.google.com/site/pcdosretro/biosfuncshttps://sites.google.com/site/pcdosretro/XT286.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/ATBIOSV3.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/ATBIOSV2.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/ATBIOS.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/XTBIOSV3.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/XTBIOSV2.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/XTBIOS.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/PCBIOS.ZIP?attredirects=0https://sites.google.com/site/pcdosretro/ibmbioshisthttps://sites.google.com/site/pcdosretro/ibmpcbioshttps://sites.google.com/site/pcdosretro/bootldrhttps://sites.google.com/site/pcdosretro/hltidlehttps://sites.google.com/site/pcdosretro/enhdebughttps://sites.google.com/site/pcdosretro/pcdos2000diffshttps://sites.google.com/site/pcdosretro/multitaskingdos4https://sites.google.com/site/pcdosretro/removedfuncshttps://sites.google.com/site/pcdosretro/sysvarshttps://sites.google.com/site/pcdosretro/dosdispatcherhttps://sites.google.com/site/pcdosretro/disklistingshttps://sites.google.com/site/pcdosretro/PC%20DOS%207%20Technical%20Update.pdf?attredirects=0https://sites.google.com/site/pcdosretro/dospatcheshttps://sites.google.com/site/pcdosretro/dosmodshttps://sites.google.com/site/pcdosretro/doshisthttps://sites.google.com/site/pcdosretro/dosapinoteshttps://sites.google.com/site/pcdosretro/dosverhttps://sites.google.com/site/pcdosretro/envvarhttps://sites.google.com/site/pcdosretro/dosint2fhttps://sites.google.com/site/pcdosretro/dostableshttps://sites.google.com/site/pcdosretro/dosfuncshttps://sites.google.com/site/pcdosretro/drivershttps://sites.google.com/site/pcdosretro/configsyshttps://sites.google.com/site/pcdosretro/commands

8/17/2019 jhf dfhk djfk dhfdjkh rui erhjkehrkherhk erkj hrekjer jfdfjkfndf

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23/4/2016 PC DOS Retro

https://sites.google.com/site/pcdosretro/ 2/2

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