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Home of the original IBM PC emulator for browsers.

IBM PC DOS 3.00

PC DOS 3.00 was announced on August 14, 1984 and released in September 1984.

A Feature Summary, along with Directory Listings of the two 360Kb distribution diskettes, are provided below.

[PCjs Machine "ibm5170-pcdos300"]

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Feature Summary

New features:

1.2MB floppy disk support
Hard disk support up to 32MB (original FAT16: partition type 04h)
Redirector support
File sharing and locking support
Date and time set from CMOS real-time clock
DOS swappable data area
CDS and FCB-SFT structures
Job file table may be relocated via new PSP fields allowing more than 20 handles
Program loading and execution now implemented in the DOS kernel
Fully qualified program name added to environment block
Interrupt vectors 20h-3Fh initialized by the DOS kernel

New external commands:

ATTRIB
GRAFTABL
KEYBFR, KEYBGR, KEYBIT, KEYBSP, KEYBUK
LABEL
SELECT
SHARE

New CONFIG.SYS commands:

FCBS
LASTDRIVE
STRING

Removed CONFIG.SYS commands:

AVAILDEV
SWITCHAR

New device drivers:

VDISK.SYS (PC DOS)

New functions:

INT 21h functions 4408h-440Bh, 59h-63h
INT 2Ah networking and critical section functions added
INT 2Fh multiplex functions 01h (PRINT), 05h (REDIR error text), 10h (SHARE), 11h (REDIR), 12h (IBMDOS)
Device driver command codes 0Dh-10h added

Removed functions:

INT 21h functions 3702h-3703h

Directory of PC DOS 3.00 (Disk 1)

 Volume in drive A has no label
 Directory of A:\

IBMBIO   COM*     8964   7-05-84   3:00p
IBMDOS   COM*    27920   7-05-84   3:00p
COMMAND  COM     22042   8-14-84   8:00a
ANSI     SYS      1641   8-14-84   8:00a
SORT     EXE      1632   8-14-84   8:00a
SHARE    EXE      8544   8-14-84   8:00a
FIND     EXE      6363   8-14-84   8:00a
ATTRIB   EXE     15123   8-14-84   8:00a
MORE     COM       320   8-14-84   8:00a
ASSIGN   COM       988   8-14-84   8:00a
PRINT    COM      7811   8-14-84   8:00a
SYS      COM      3629   8-14-84   8:00a
CHKDSK   COM      9275   8-14-84   8:00a
FORMAT   COM      9015   8-14-84   8:00a
VDISK    SYS      3080   8-14-84   8:00a
BASIC    COM     17024   8-14-84   8:00a
BASICA   COM     26880   8-14-84   8:00a
FDISK    COM      8076   8-14-84   8:00a
COMP     COM      3471   8-14-84   8:00a
TREE     COM      2473   8-14-84   8:00a
BACKUP   COM      5440   8-14-84   8:00a
RESTORE  COM      5413   8-14-84   8:00a
LABEL    COM      1260   8-14-84   8:00a
DISKCOPY COM      4165   8-14-84   8:00a
DISKCOMP COM      3752   8-14-84   8:00a
KEYBSP   COM      2073   8-14-84   8:00a
KEYBIT   COM      1854   8-14-84   8:00a
KEYBGR   COM      2111   8-14-84   8:00a
KEYBUK   COM      1760   8-14-84   8:00a
KEYBFR   COM      2235   8-14-84   8:00a
MODE     COM      5194   8-14-84   8:00a
SELECT   COM      2079   8-14-84   8:00a
GRAPHICS COM      3111   8-14-84   8:00a
RECOVER  COM      4066   8-14-84   8:00a
EDLIN    COM      7183   8-14-84   8:00a
GRAFTABL COM      1169   8-14-84   8:00a
       36 file(s)     237136 bytes
                      103424 bytes free

Directory of PC DOS 3.00 (Disk 2)

 Volume in drive A has no label
 Directory of A:\

LINK     EXE     45970   8-14-84   8:00a
EXE2BIN  EXE      2752   8-14-84   8:00a
DEBUG    COM     15237   8-14-84   8:00a
VDISK    LST    128900   8-14-84   8:00a
SAMPLES  BAS      3093   8-14-84   8:00a
ART      BAS      1920   8-14-84   8:00a
MUSIC    BAS     10291   8-14-84   8:00a
MUSICA   BAS     15255   8-14-84   8:00a
MORTGAGE BAS      6272   8-14-84   8:00a
COLORBAR BAS      1536   8-14-84   8:00a
DONKEY   BAS      3584   8-14-84   8:00a
CIRCLE   BAS      1664   8-14-84   8:00a
PIECHART BAS      2304   8-14-84   8:00a
SPACE    BAS      1920   8-14-84   8:00a
BALL     BAS      2048   8-14-84   8:00a
COMM     BAS      4352   8-14-84   8:00a
       16 file(s)     247098 bytes
                      108544 bytes free

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