--- layout: page title: Microsoft MS-DOS 2.00 permalink: /disks/pcx86/dos/microsoft/2.00/ --- Microsoft MS-DOS 2.00 --------------------- There was no MS-DOS 2.00 product *per se*. Instead, there were OEM releases of MS-DOS based on version 2.00, including: * [COMPAQ MS-DOS 2.12](/disks/pcx86/dos/compaq/2.12/) MS-DOS 2.00 Source Code ----------------------- On March 25, 2014, the source code upon which OEMs based their MS-DOS 2.x releases was made available to the public by the [Computer History Museum](http://www.computerhistory.org/atchm/microsoft-ms-dos-early-source-code/), with the permission of Microsoft. ![MS-DOS 2.00](MSDOS200-DISKS.jpg) For reasons known only to the Computer History Museum, the precise contents of the five diskettes donated to the museum remain a mystery. Instead, the museum released a ZIP archive with the contents of the diskettes divided into two folders, `v20object` and `v20source`, with no clear indication which files came from which disk, why some files were renamed (and what the original names were), and what (if anything) was omitted. We have divided the contents of the `v20object` folder into two 320Kb "binary" disk images and the contents of the `v20source` folder into six 320Kb "source" disk images, to make it easier to inspect all the files from "virtually" any PCjs machine. ### Directory of MS-DOS 2.00 (Binary Disk 1) Volume in drive A is MSDOS200B01 Directory of A:\ ANSI DOC 6784 1-27-83 2:31p CHKDSK COM 6330 2-01-83 8:16a COMMAND COM 15480 2-08-83 6:50p CONFIG DOC 3456 1-27-83 2:35p CREF EXE 13824 6-02-82 6:06p DEBUG COM 11764 2-01-83 9:13a DEVDRIV DOC 37888 1-27-83 2:22p DISKCOPY COM 1419 2-14-83 3:39p DOSPATCH TXT 2546 2-08-83 7:04p EDLIN COM 4389 2-01-83 5:45p EXE2BIN EXE 1649 2-01-83 8:19a FC EXE 2553 2-01-83 8:36a FILBP PAS 6144 1-28-83 5:08p FIND EXE 5796 1-14-83 5:35p FORMAT DOC 16640 2-03-83 2:37p FORMAT OBJ 4864 2-03-83 1:18p FORMES OBJ 1152 2-03-83 1:03p INCOMP DOC 2688 1-27-83 2:42p INT24 DOC 4224 1-27-83 2:30p LINK EXE 42368 1-06-83 3:36p MASM EXE 77440 2-01-83 12:13p MORE COM 4364 1-14-83 5:42p MSDOS SYS 16690 2-08-83 6:48p 23 File(s) 19456 bytes free ### Directory of MS-DOS 2.00 (Binary Disk 2) Volume in drive A is MSDOS200B02 Directory of A:\ PRINT COM 3808 2-01-83 11:39a PROFIL OBJ 2304 10-28-82 5:32p PROFILE DOC 3968 1-27-83 2:34p PROHST EXE 41728 1-28-83 4:51p PROHST PAS 11520 1-28-83 5:07p QUICK DOC 3456 1-27-83 2:39p README DOC 8832 1-01-80 12:00a RECOVER COM 2277 2-01-83 1:22p SORT EXE 1216 2-08-83 6:04p SYS COM 850 2-01-83 1:26p SYSCALL DOC 59136 1-27-83 2:18p SYSIMES OBJ 384 1-24-83 10:42a SYSINIT DOC 3072 1-27-83 2:40p SYSINIT OBJ 3328 2-08-83 7:24p UTILITY DOC 27776 1-27-83 2:26p 15 File(s) 141312 bytes free ### Directory of MS-DOS 2.00 (Source Disk 1) Volume in drive A is MSDOS200S01 Directory of A:\ ALLOC ASM 11648 8-18-83 2:26p ANSI TXT 6784 1-27-83 2:31p BUF ASM 14716 8-19-83 11:53a CHKDSK ASM 26880 8-18-83 4:10p CHKMES ASM 14080 8-18-83 4:14p CHKPROC ASM 40704 8-18-83 4:12p COMEQU ASM 900 8-25-83 3:06p COMLINK 128 8-18-83 3:18p COMMAND ASM 23936 8-18-83 2:59p COMSEG ASM 782 8-25-83 3:04p COMSW ASM 512 1-01-80 12:00a CONFIG TXT 3456 1-27-83 2:35p COPY ASM 20480 8-18-83 3:14p COPYPROC ASM 18304 8-18-83 3:15p CPARSE ASM 9472 8-18-83 3:15p CTRLC ASM 14764 8-19-83 11:55a DEBASM ASM 34304 8-18-83 4:03p DEBCOM1 ASM 27008 8-18-83 3:58p DEBCOM2 ASM 37356 10-20-83 10:28a 19 File(s) 7168 bytes free ### Directory of MS-DOS 2.00 (Source Disk 2) Volume in drive A is MSDOS200S02 Directory of A:\ DEBCONST ASM 38912 8-18-83 4:07p DEBDATA ASM 2816 8-18-83 4:07p DEBEQU ASM 1280 1-01-80 12:12a DEBMES ASM 5248 1-01-80 12:00a DEBUASM ASM 21888 8-18-83 4:05p DEBUG ASM 22016 8-18-83 3:56p DEV ASM 12032 8-18-83 2:27p DEVDRIV TXT 37888 1-27-83 2:22p DEVSYM ASM 2688 10-18-82 12:07p DIR ASM 29568 8-18-83 2:28p DIRCALL ASM 14592 8-18-83 2:25p DISK ASM 38016 8-18-83 2:30p DISKCOPY ASM 6656 1-01-80 12:00a DISKMES ASM 7808 1-01-80 12:00a DOSLINK 141 8-25-83 4:46p DOSMAC 211 4395 9-12-83 10:41a DOSMAC ASM 6656 10-18-82 12:06p DOSMES ASM 14098 9-28-83 2:41p DOSSEG ASM 357 8-25-83 3:04p DOSSYM 211 44887 8-25-83 3:05p 20 File(s) 1024 bytes free ### Directory of MS-DOS 2.00 (Source Disk 3) Volume in drive A is MSDOS200S03 Directory of A:\ DOSSYM ASM 42112 1-01-80 12:00a EDLIN ASM 56960 1-01-80 1:08a EDLMES ASM 3200 8-18-83 4:21p EDLPROC ASM 13190 9-22-83 11:03p EXE2BIN ASM 13824 1-01-80 12:00a EXEC ASM 31011 8-19-83 11:59a EXEMES ASM 768 1-01-80 12:00a FAT ASM 10112 8-18-83 2:31p FC ASM 65024 1-01-80 12:00a FCB ASM 13392 8-19-83 11:52a FCMES ASM 2048 1-01-80 12:00a FIND ASM 39168 1-01-80 12:00a FINDMES ASM 1408 1-01-80 12:00a FORMAT TXT 16640 2-03-83 2:37p 14 File(s) 6144 bytes free ### Directory of MS-DOS 2.00 (Source Disk 4) Volume in drive A is MSDOS200S04 Directory of A:\ FORMAT ASM 46720 1-01-80 1:48p FORMES ASM 4529 9-22-83 10:00p GENFOR ASM 4096 2-03-83 1:45p GETSET ASM 18048 8-18-83 2:14p HRDDRV ASM 17536 1-01-80 12:00a IFEQU ASM 303 8-25-83 3:06p INCOMP TXT 2688 1-27-83 2:42p INIT ASM 24832 8-18-83 3:01p INT24 TXT 4224 1-27-83 2:30p MISC ASM 18304 8-18-83 2:13p MORE ASM 3712 1-01-80 1:39a MOREMES ASM 313 9-22-83 9:23p MSCODE ASM 22208 1-03-80 4:25a MSDATA ASM 11520 1-01-80 12:00a MSDOS ASM 176 1-03-80 4:18a MSHEAD ASM 9216 1-01-80 12:00a MSINIT ASM 13568 1-01-80 12:00a PCLOCK ASM 3200 10-28-82 5:32p PRINT 211 48000 1-01-80 1:42a PRINT ASM 48000 2-01-83 11:37a 20 File(s) 11264 bytes free ### Directory of MS-DOS 2.00 (Source Disk 5) Volume in drive A is MSDOS200S05 Directory of A:\ PROC ASM 3222 8-19-83 11:55a PROFIL ASM 21248 10-28-82 5:31p PROFILE TXT 3968 1-27-83 2:34p PROHST HLP 1536 1-28-83 5:06p QUICK TXT 3456 1-27-83 2:39p RDATA ASM 6784 8-18-83 3:00p README TXT 8832 1-01-80 12:00a RECMES ASM 5760 1-01-80 12:00a RECOVER ASM 23808 1-01-80 2:01a ROM ASM 14336 8-18-83 2:32p RUCODE ASM 6912 8-18-83 2:59p SKELIO ASM 45056 1-01-80 12:00a SORT ASM 17099 9-22-83 10:27p SORTMES ASM 2688 1-01-80 2:07a STDBUF ASM 256 8-18-83 2:32p STDCALL ASM 256 8-18-83 2:33p STDCTRLC ASM 256 8-18-83 2:39p STDFCB ASM 193 1-03-80 6:40a STDIO ASM 210 1-03-80 6:41a STDPROC ASM 185 1-03-80 5:27a STDSW ASM 1280 1-01-80 12:00a STRIN ASM 9726 8-19-83 11:54a SYSCALL ASM 21220 1-03-80 5:26a SYSCALL TXT 59136 1-27-83 2:18p SYSIMES ASM 512 1-01-80 12:00a SYSINIT ASM 37644 10-12-83 9:24p 26 File(s) 14336 bytes free ### Directory of MS-DOS 2.00 (Source Disk 6) Volume in drive A is MSDOS200S06 Directory of A:\ SYS ASM 22784 9-22-83 9:29p SYSINIT TXT 3072 1-27-83 2:40p SYSMES ASM 1206 9-22-83 9:52p TCODE ASM 33664 9-08-83 1:48a TCODE2 ASM 13568 8-18-83 3:05p TCODE3 ASM 16896 8-18-83 3:10p TCODE4 ASM 27392 8-18-83 3:11p TCODE5 ASM 24576 9-08-83 1:49a TDATA ASM 9088 1-01-80 12:00a TIME ASM 7040 8-18-83 2:45p TSPC ASM 4480 8-18-83 3:17p TUCODE ASM 7808 8-18-83 3:13p UINIT ASM 896 1-01-80 12:00a UTILITY TXT 27776 1-27-83 2:26p WSBAUD BAS 1152 2-23-13 7:45a WSMSGS OVR 27264 2-23-13 7:45a WSOVLY1 OVR 40960 2-23-13 7:45a XENIX ASM 25984 1-03-80 5:57a XENIX2 ASM 17792 8-18-83 2:51p 19 File(s) 1024 bytes free