PC DOS Retro by Vernon Brooks
Information and history about PC DOS and MS-DOS
- List of DOS commands
- List of DOS CONFIG.SYS commands
- List of DOS device drivers
- List of DOS functions
- List of DOS tables and structures
- List of DOS multiplex (INT 2Fh) functions
- List of standard DOS environment variables
- DOS device driver information
- DOS version information
- DOS API notes
- History 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 usage
- PC DOS disk listings
- Evolution of the DOS INT 21h function dispatcher
- Information about the DOS SYSVARS table
- Information about undocumented and removed DOS functions
- Information about the little known multitasking MS-DOS 4.0
- Analysis of PC DOS 2000 Y2K differences from PC DOS 7
- Enhanced DEBUG for PC DOS and MS-DOS
- Modified VIDE-CDD.SYS supporting native IDE mode
- HLTIDLE - reduce CPU power usage in DOS
- EXTBUF - extend the BIOS keyboard buffer
IBM PC BIOS source code reconstruction
- Information
- IBM PC BIOS version history
- IBM 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 information
- BIOS functions
- BIOS data area
- Keyboard scan code/character code combinations
- List of PC interrupts
- 80x86 instruction reference
- Expanded Memory Specification (EMS): version 3.2 - version 4.0
- Extended Memory Specification (XMS): version 2.0 - version 3.0
- Virtual Control Program Interface (VCPI) specification: version 1.0
- Virtual DMA Services (VDS) specification: version 1.0
- DOS Protected Mode Interface (DPMI) specification: version 0.9 - version 1.0
- VESA BIOS Extension (VBE) specification: version 1.2 - version 2.0 - version 3.0
- BIOS Enhanced Disk Drive (EDD) services specification: version 1.1 - version 3.0
- Advanced Power Management (APM) BIOS interface specification: version 1.2
- PCI BIOS specification: version 2.1
- Plug and Play BIOS specification: version 1.0A
- Microsoft File Allocation Table (FAT) file system documentation
- Microsoft CD-ROM Extensions (MSCDEX) documentation
- Relocatable Object Module Format (OMF) documentation
- Master Boot Record (MBR) information and commented code disassembly
Other stuff
- Official reference books of the DOS era
- PC DOS 7 Technical Update - the official technical reference for PC DOS 7
- PhoenixBIOS 4.0 User's Manual
- Microsoft Macro Assembler (MASM) version history
- Microsoft C compiler version history
PC DOS Retro © 2013-2026 Vernon Brooks
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