MS-DOS 2.11 source code released by CHM, with files from the MS-DOS 2.00 OAK removed (as they are not MS-DOS 2.11 source files). CHM did not preserve the directory structure of the original source code. Timestamps provided below for reference:
1983/08/18 14:26:36 11,648 ALLOC.ASM
1983/08/19 11:53:04 14,716 BUF.ASM
1983/08/18 16:10:38 26,880 CHKDSK.ASM
1983/08/18 16:14:44 14,080 CHKMES.ASM
1983/08/18 16:12:18 40,704 CHKPROC.ASM
1983/08/25 15:06:18 900 COMEQU.ASM
1983/08/18 15:18:16 128 COMLINK
1983/08/18 14:59:06 23,936 COMMAND.ASM
1983/08/25 15:04:08 782 COMSEG.ASM
1980/01/01 00:13:10 512 COMSW.ASM
1983/08/18 15:14:20 20,480 COPY.ASM
1983/08/18 15:15:16 18,304 COPYPROC.ASM
1983/08/18 15:15:56 9,472 CPARSE.ASM
1983/08/19 11:55:50 14,764 CTRLC.ASM
1983/08/18 16:03:54 34,304 DEBASM.ASM
1983/08/18 15:58:12 27,008 DEBCOM1.ASM
1983/10/20 10:28:10 37,356 DEBCOM2.ASM
1983/08/18 16:07:06 38,912 DEBCONST.ASM
1983/08/18 16:07:40 2,816 DEBDATA.ASM
1980/01/01 01:12:36 1,280 DEBEQU.ASM
1980/01/01 00:49:10 5,248 DEBMES.ASM
1983/08/18 16:05:14 21,888 DEBUASM.ASM
1983/08/18 15:56:58 22,016 DEBUG.ASM
1983/08/18 14:27:22 12,032 DEV.ASM
1983/08/18 14:28:48 29,568 DIR.ASM
1983/08/18 14:25:40 14,592 DIRCALL.ASM
1983/08/18 14:30:38 38,016 DISK.ASM
1980/01/01 00:51:48 6,656 DISKCOPY.ASM
1980/01/01 00:52:38 7,808 DISKMES.ASM
1983/08/25 16:46:20 141 DOSLINK
1983/09/12 10:41:22 4,395 DOSMAC.ASM
1983/09/28 14:41:50 14,098 DOSMES.ASM
1983/08/25 15:04:22 357 DOSSEG.ASM
1983/08/25 15:05:44 44,887 DOSSYM.ASM
1980/01/01 02:08:10 56,960 EDLIN.ASM
1983/08/18 16:21:46 3,200 EDLMES.ASM
1983/09/22 23:03:32 13,190 EDLPROC.ASM
1980/01/01 00:45:06 13,824 EXE2BIN.ASM
1983/08/19 11:59:32 31,011 EXEC.ASM
1980/01/01 00:45:24 768 EXEMES.ASM
1983/08/18 14:31:30 10,112 FAT.ASM
1980/01/01 00:26:22 65,024 FC.ASM
1983/08/19 11:52:32 13,392 FCB.ASM
1980/01/01 00:26:42 2,048 FCMES.ASM
1980/01/01 00:28:36 39,168 FIND.ASM
1980/01/01 00:29:22 1,408 FINDMES.ASM
1980/01/01 14:48:16 46,720 FORMAT.ASM
1983/09/22 22:00:04 4,529 FORMES.ASM
1983/08/18 14:14:38 18,048 GETSET.ASM
1983/08/25 15:06:00 303 IFEQU.ASM
1983/08/18 15:01:24 24,832 INIT.ASM
1983/08/18 14:13:16 18,304 MISC.ASM
1980/01/01 02:39:20 3,712 MORE.ASM
1983/09/22 21:23:54 313 MOREMES.ASM
1980/01/03 05:25:56 22,208 MSCODE.ASM
1980/01/01 00:15:46 11,520 MSDATA.ASM
1980/01/03 05:18:14 176 MSDOS.ASM
1980/01/01 00:10:14 9,216 MSHEAD.ASM
1980/01/01 00:24:52 13,568 MSINIT.ASM
1980/01/01 02:42:56 48,000 PRINT.ASM
1983/08/19 11:55:22 3,222 PROC.ASM
1983/08/18 15:00:18 6,784 RDATA.ASM
1980/01/01 00:39:06 5,760 RECMES.ASM
1980/01/01 03:01:58 23,808 RECOVER.ASM
1983/08/18 14:32:20 14,336 ROM.ASM
1983/08/18 14:59:40 6,912 RUCODE.ASM
1983/09/22 22:27:04 17,099 SORT.ASM
1980/01/01 03:07:50 2,688 SORTMES.ASM
1983/08/18 14:32:46 256 STDBUF.ASM
1983/08/18 14:33:56 256 STDCALL.ASM
1983/08/18 14:39:02 256 STDCTRLC.ASM
1980/01/03 07:40:50 193 STDFCB.ASM
1980/01/03 07:41:02 210 STDIO.ASM
1980/01/03 06:27:54 185 STDPROC.ASM
1980/01/01 00:12:18 1,280 STDSW.ASM
1983/08/19 11:54:24 9,726 STRIN.ASM
1983/09/22 21:29:40 22,784 SYS.ASM
1980/01/03 06:26:22 21,220 SYSCALL.ASM
1980/01/01 00:44:22 512 SYSIMES.ASM
1983/10/12 21:24:26 37,644 SYSINIT.ASM
1983/09/22 21:52:50 1,206 SYSMES.ASM
1983/09/08 01:48:06 33,664 TCODE.ASM
1983/08/18 15:05:08 13,568 TCODE2.ASM
1983/08/18 15:10:32 16,896 TCODE3.ASM
1983/08/18 15:11:40 27,392 TCODE4.ASM
1983/09/08 01:49:00 24,576 TCODE5.ASM
1980/01/01 00:38:32 9,088 TDATA.ASM
1983/08/18 14:45:52 7,040 TIME.ASM
1983/08/18 15:17:42 4,480 TSPC.ASM
1983/08/18 15:13:22 7,808 TUCODE.ASM
1980/01/01 00:03:04 896 UINIT.ASM
1980/01/03 06:57:14 25,984 XENIX.ASM
1983/08/18 14:51:18 17,792 XENIX2.ASM