Operating systems › DOS (MS-DOS / DR-DOS) › DR-DOS 6.0

DR-DOS 6.0

1991

The 1991 release adding SuperStor disk compression, task switching and password security to the DR-DOS line.

Machines

IBM PC 5150

IBM PC/AT

IBM PC/XT

Chips

IBM CGA

IBM EGA

IBM MDA

IBM PC speaker

Intel 80286

Intel 8088

Motorola MC146818 RTC

Reference & documentation

External technical references for programming DR-DOS 6.0 and for writing emulators.

ResourceTypeNotes
Design of the FAT file system ↗FormatHex-offset tables for FAT12/16 structures
Microsoft FAT Specification ↗FormatPrimary Microsoft FAT spec v1.03 (PDF)
DOS MZ executable format ↗FormatMZ .EXE header fields and relocation table
FAT Filesystem (elm-chan) ↗FormatDetailed FAT boot sector, BPB, cluster chains
Ralf Brown's Interrupt List (HTML) ↗Interrupt listEvery documented/undocumented DOS interrupt, includes DR-DOS calls
MS-DOS 7 system programming: interrupt handlers ↗Interrupt listBIOS and DOS interrupt handlers with registers
Undocumented DOS Programming (fysnet) ↗ProgrammingINT 21h internals, DOS data structures, PSP, DPB
DR DOS 6.00 (Digital Research) disk images ↗ROMsBootable DR-DOS 6.0 STARTUP + ViewMax floppy images
Ralf Brown's Interrupt List (browsable index) ↗ReferenceRBIL indexed by interrupt number and function
DR-DOS (Wikipedia) ↗ReferenceVersion history, HMA load-high, TASKMAX, SuperStor