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Starting work on disambiguating PCjs the emulator from PCjs the project/website; the emulator will become PCx86

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Jeff Parsons 2016-05-16 20:53:57 -07:00
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179
disks/pc/dos/microsoft/4.01/README.md
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---
layout: page
title: Microsoft MS-DOS 4.01
permalink: /disks/pc/dos/microsoft/4.01/
machines:
- type: pc
id: ibm5170-msdos401
config: /devices/pc/machine/5170/ega/640kb/rev1/machine.xml
autoMount:
A:
name: MS-DOS 4.01 (Disk 1)
path: /disks/pc/dos/microsoft/4.01/MSDOS401-DISK1.json
---
Microsoft MS-DOS 4.01
---
The PCjs machine below is running PC-DOS 4.01.
{% include machine.html id="ibm5170-msdos401" %}
MS-DOS 4.01 was released in April 1989. The contents of the six 360Kb distribution diskettes are shown below.
### Directory of MS-DOS 4.01 (Disk 1)
Volume in drive A is INST V401
Volume Serial Number is 2A33-13E4
Directory of A:\
IO SYS 33337 04-07-89 12:00a
MSDOS SYS 37376 04-07-89 12:00a
AUTOEXEC BAT 39 04-07-89 12:00a
COMMAND COM 37557 04-07-89 12:00a
CONFIG SYS 96 04-07-89 12:00a
COUNTRY SYS 12806 04-07-89 12:00a
DISKCOPY COM 10396 04-07-89 12:00a
DISPLAY SYS 15692 04-07-89 12:00a
FDISK EXE 60935 04-07-89 12:00a
FORMAT COM 22875 04-07-89 12:00a
KEYB COM 14727 04-07-89 12:00a
KEYBOARD SYS 23328 04-07-89 12:00a
REPLACE EXE 19415 04-07-89 12:00a
SELECT COM 3642 04-07-89 12:00a
SELECT HLP 28695 04-07-89 12:00a
SELECT PRT 1329 04-07-89 12:00a
SYS COM 11456 04-07-89 12:00a
17 File(s) 18432 bytes free
### Directory of MS-DOS 4.01 (Disk 2)
Volume in drive A is OP#1 V401
Directory of A:\
ASSIGN COM 5753 04-07-89 12:00a
ATTRIB EXE 18263 04-07-89 12:00a
CHKDSK COM 17787 04-07-89 12:00a
COMMAND COM 37557 04-07-89 12:00a
COMP COM 9459 04-07-89 12:00a
DEBUG COM 21574 04-07-89 12:00a
DISKCOMP COM 9857 04-07-89 12:00a
EDLIN COM 14069 04-07-89 12:00a
FC EXE 15807 04-07-89 12:00a
FILESYS EXE 11129 04-07-89 12:00a
FIND EXE 5941 04-07-89 12:00a
IFSFUNC EXE 21739 04-07-89 12:00a
JOIN EXE 17813 04-07-89 12:00a
LABEL COM 4458 04-07-89 12:00a
MEM EXE 20005 04-07-89 12:00a
MORE COM 2134 04-07-89 12:00a
SHARE EXE 13424 04-07-89 12:00a
SORT EXE 5882 04-07-89 12:00a
SUBST EXE 18467 04-07-89 12:00a
TREE COM 6302 04-07-89 12:00a
XCOPY EXE 17055 04-07-89 12:00a
21 File(s) 56320 bytes free
### Directory of MS-DOS 4.01 (Disk 3)
Volume in drive A is OP#2 V401
Directory of A:\
COMMAND COM 37557 04-07-89 12:00a
EMM386 SYS 87776 04-07-89 12:00a
EXE2BIN EXE 7963 04-07-89 12:00a
GWBASIC EXE 80608 04-07-89 12:00a
LINK EXE 43988 04-07-89 12:00a
PRINT COM 14131 04-07-89 12:00a
RAMDRIVE SYS 8235 04-07-89 12:00a
README TXT 17825 04-07-89 12:00a
SMARTDRV SYS 10224 04-07-89 12:00a
XMA2EMS SYS 29211 04-07-89 12:00a
10 File(s) 21504 bytes free
### Directory of MS-DOS 4.01 (Disk 4)
Volume in drive A is OP#3 V401
Volume Serial Number is 2A33-13E4
Directory of A:\
4201 CPI 6404 04-07-89 12:00a
4208 CPI 720 04-07-89 12:00a
5202 CPI 370 04-07-89 12:00a
ANSI SYS 9105 04-07-89 12:00a
APPEND EXE 11154 04-07-89 12:00a
COMMAND COM 37557 04-07-89 12:00a
COUNTRY SYS 12806 04-07-89 12:00a
DISPLAY SYS 15692 04-07-89 12:00a
DRIVER SYS 5241 04-07-89 12:00a
FASTOPEN EXE 16718 04-07-89 12:00a
GRAFTABL COM 10239 04-07-89 12:00a
GRAPHICS COM 16693 04-07-89 12:00a
GRAPHICS PRO 9397 04-07-89 12:00a
HIMEM SYS 6261 04-07-89 12:00a
KEYB COM 14727 04-07-89 12:00a
KEYBOARD SYS 23328 04-07-89 12:00a
MODE COM 22960 04-07-89 12:00a
NLSFUNC EXE 6878 04-07-89 12:00a
PRINTER SYS 18914 04-07-89 12:00a
RAMDRIVE SYS 8235 04-07-89 12:00a
RECOVER COM 10588 04-07-89 12:00a
21 File(s) 15360 bytes free
### Directory of MS-DOS 4.01 (Disk 5)
Volume in drive A is SELECT V401
Directory of A:\
BACKUP COM 36880 04-07-89 12:00a
EGA CPI 49068 04-07-89 12:00a
FORMAT COM 22875 04-07-89 12:00a
LCD CPI 10703 04-07-89 12:00a
MODE COM 22960 04-07-89 12:00a
RESTORE COM 36946 04-07-89 12:00a
SELECT DAT 22999 04-07-89 12:00a
SELECT EXE 95107 04-07-89 12:00a
XMA2EMS SYS 29211 04-07-89 12:00a
9 File(s) 30720 bytes free
### Directory of MS-DOS 4.01 (Disk 6)
Volume in drive A is SHELL V401
Directory of A:\
CHKDSK COM 17787 04-07-89 12:00a
COMMAND COM 37557 04-07-89 12:00a
DISKCOPY COM 10396 04-07-89 12:00a
DOSUTIL MEU 6660 04-07-89 12:00a
PCIBMDRV MOS 263 04-07-89 12:00a
PRINT COM 14131 04-07-89 12:00a
SHELL HLP 66527 04-07-89 12:00a
SHELL MEU 4588 04-07-89 12:00a
SHELL CLR 4406 04-07-89 12:00a
SHELLB COM 3894 04-07-89 12:00a
SHELLC EXE 153855 04-07-89 12:00a
11 File(s) 36864 bytes free
---
Additional details about MS-DOS 4.01 from [PC DOS Retro](https://sites.google.com/site/pcdosretro/doshist):
- distributed on 2 720KB floppy disks [also released on 6 360KB diskettes; the number of 720KB diskettes needs to be verified]
- maintenance release
- DOS version is reported as 4.00 [although the VER command reports "4.01"]
- SHARE loaded for FCB operations on hard disks greater than 32MB
- IFS driver support added
- MEM command added to report memory usage
- new internal command: TRUENAME
- new external commands: FILESYS, IFSFUNC, MEM
- new CONFIG.SYS commands: COMMENT, CPSW, IFS, INSTALL, MULTITRACK, REM, SWITCHES
- new device drivers: SMARTDRV.SYS (MS-DOS), XMA2EMS.SYS, XMAEM.SYS
- new support file: GRAPHICS.PRO
- disk buffers could be allocated in expanded memory (BUFFERS /X)
- DPB, SFT and CDS structures extended
- new internal version table added
- DOS swappable data area changed
- program names added to MCBs
- INT 21h functions 3305h, 5D0Bh, 5F05h-5F08h, 6507h, 6520h-6523h, 65A0h-65A3h, 69h-6Ch added
- INT 21h functions 3303h-3304h, 5702h-5704h reserved but unused
- INT 2Fh multiplex function 1Ah (ANSI.SYS) added