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IBM PC DOS 4.00 |
/disks/pcx86/dos/ibm/4.00/ |
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PC DOS 4.00 was released in July 1988.
A Feature Summary, along with Directory Listings of the five 360Kb distribution diskettes, are provided below.
{% include machine.html id="ibm5170-pcdos400" %}
New features:
- SHARE loaded for FCB operations on hard disks greater than 32MB
- IFS driver support
- Disk buffers could be allocated in expanded memory (BUFFERS /X)
- DPB, SFT and CDS structures extended
- New internal version table
- DOS swappable data area changed
- Program names added to MCBs
- System block sub-MCB headers added (used by MEM)
- Most commands use new message retriever (allows message text separation for translation purposes)
Another significant change in DOS 4.00 was the ability to update the system files (IBMBIO.COM and IBMDOS.COM in PC DOS, or IO.SYS and MSDOS.SYS in MS-DOS) of any boot disk, by moving the first two directory entries (and the contents of the first three data sectors) as needed to make room for the new system files.
The SYS command in older versions of DOS would report "No room for system on destination disk" if the first two directory entries (or the first three data sectors) were unavailable. However, after using the DOS 4.00 SYS command, it usually became possible to install older DOS versions as well.
Learn more about the history of the SYS command from Microsoft Support.
New internal commands:
- TRUENAME
New external commands:
- FILESYS
- FORMAT /F (to specify disk size to format)
- 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 files:
- GRAPHICS.PRO
New functions:
- INT 21h functions 3305h, 5D0Bh, 5F05h-5F08h, 6507h, 6520h-6523h, 65A0h-65A3h, 69h-6Ch
- INT 2Fh multiplex function 1Ah (ANSI.SYS)
Volume in drive A has no label
Volume Serial Number is 1D53-17EC
Directory of A:\
IBMBIO COM 32816 08-03-88 12:00p
IBMDOS COM 36000 08-03-88 12:00p
COMMAND COM 37637 06-17-88 12:00p
AUTOEXEC BAT 39 06-17-88 12:00p
CONFIG SYS 96 06-17-88 12:00p
COUNTRY SYS 12838 06-17-88 12:00p
DISKCOPY COM 10428 06-17-88 12:00p
DISPLAY SYS 15741 06-17-88 12:00p
FDISK COM 70151 06-17-88 12:00p
FORMAT COM 22923 06-17-88 12:00p
KEYB COM 14759 06-17-88 12:00p
KEYBOARD SYS 23360 08-03-88 12:00p
REPLACE EXE 17199 06-17-88 12:00p
SELECT COM 3674 08-03-88 12:00p
SELECT HLP 27562 08-03-88 12:00p
SELECT PRT 1594 08-03-88 12:00p
SYS COM 11472 06-17-88 12:00p
012345 678 109 06-17-88 12:00p
DOS00I 400 0 06-17-88 12:00p
19 file(s) 338398 bytes
17408 bytes free
Volume in drive A has no label
Volume Serial Number is 203D-10CC
Directory of A:\
COMMAND COM 37637 06-17-88 12:00p
ASSIGN COM 5785 06-17-88 12:00p
ATTRIB EXE 18247 06-17-88 12:00p
BASIC COM 1065 06-17-88 12:00p
BASICA COM 36285 06-17-88 12:00p
COMP COM 9491 06-17-88 12:00p
DEBUG COM 21606 06-17-88 12:00p
DISKCOMP COM 9889 06-17-88 12:00p
EDLIN COM 14249 06-17-88 12:00p
FILESYS EXE 11125 06-17-88 12:00p
FIND EXE 5983 06-17-88 12:00p
IFSFUNC EXE 21653 08-03-88 12:00p
JOIN EXE 17457 06-17-88 12:00p
LABEL COM 4490 06-17-88 12:00p
MEM EXE 20133 06-17-88 12:00p
MODE COM 23056 08-03-88 12:00p
MORE COM 2166 06-17-88 12:00p
MORTGAGE BAS 6207 06-17-88 12:00p
SHARE EXE 10301 08-03-88 12:00p
SORT EXE 5914 06-17-88 12:00p
SUBST EXE 18143 06-17-88 12:00p
TREE COM 6334 06-17-88 12:00p
XCOPY EXE 17087 06-17-88 12:00p
DOS01I 400 0 06-17-88 12:00p
24 file(s) 324303 bytes
30208 bytes free
Volume in drive A has no label
Volume Serial Number is 234D-10CB
Directory of A:\
COMMAND COM 37637 06-17-88 12:00p
CHKDSK COM 17771 06-17-88 12:00p
DISKCOPY COM 10428 06-17-88 12:00p
PCIBMDRV MOS 295 06-17-88 12:00p
PCMSDRV MOS 961 06-17-88 12:00p
PCMSPDRV MOS 801 06-17-88 12:00p
PRINT COM 14024 08-03-88 12:00p
SHELL CLR 4438 06-17-88 12:00p
SHELL HLP 65667 08-03-88 12:00p
SHELL MEU 4588 08-03-88 12:00p
SHELLB COM 3937 08-03-88 12:00p
SHELLC EXE 154377 08-03-88 12:00p
DOSUTIL MEU 6660 06-17-88 12:00p
012345 678 109 06-17-88 12:00p
DOS02I 400 0 06-17-88 12:00p
15 file(s) 321693 bytes
36352 bytes free
Volume in drive A has no label
Volume Serial Number is 1821-17E7
Directory of A:\
IBMBIO COM 32816 08-03-88 12:00p
IBMDOS COM 36000 08-03-88 12:00p
COMMAND COM 37637 06-17-88 12:00p
ANSI SYS 9148 06-17-88 12:00p
APPEND EXE 11186 08-03-88 12:00p
COUNTRY SYS 12838 06-17-88 12:00p
DISPLAY SYS 15741 06-17-88 12:00p
DRIVER SYS 5274 06-17-88 12:00p
FASTOPEN EXE 16302 06-17-88 12:00p
GRAFTABL COM 10271 06-17-88 12:00p
GRAPHICS COM 16733 06-17-88 12:00p
GRAPHICS PRO 9413 06-17-88 12:00p
KEYB COM 14759 06-17-88 12:00p
KEYBOARD SYS 23360 08-03-88 12:00p
MODE COM 23056 08-03-88 12:00p
NLSFUNC EXE 6910 06-17-88 12:00p
PRINTER SYS 18946 06-17-88 12:00p
RECOVER COM 10732 06-17-88 12:00p
VDISK SYS 6376 06-17-88 12:00p
4201 CPI 6404 06-17-88 12:00p
4208 CPI 641 06-17-88 12:00p
5202 CPI 402 06-17-88 12:00p
DOS03I 400 0 06-17-88 12:00p
23 file(s) 324945 bytes
30720 bytes free
Volume in drive A has no label
Volume Serial Number is 363D-10CB
Directory of A:\
BACKUP COM 33754 06-17-88 12:00p
EGA CPI 49052 06-17-88 12:00p
FORMAT COM 22923 06-17-88 12:00p
LCD CPI 10592 06-17-88 12:00p
MODE COM 23056 08-03-88 12:00p
RESTORE COM 40030 06-17-88 12:00p
SELECT DAT 22453 08-03-88 12:00p
SELECT EXE 99545 08-03-88 12:00p
XMAEM SYS 19312 06-17-88 12:00p
XMA2EMS SYS 29249 08-03-88 12:00p
DOS04L 400 0 06-17-88 12:00p
11 file(s) 349966 bytes
9216 bytes free
Volume in drive A has no label
Volume Serial Number is 18BD-1F2B
Directory of A:\
DEBUG COM 21606 06-17-88 12:00p
EXE2BIN EXE 7973 06-17-88 12:00p
LIB EXE 47107 06-17-88 12:00p
LINK EXE 105406 06-17-88 12:00p
VDISK ASM 75571 06-17-88 12:00p
5 file(s) 257663 bytes
102400 bytes free