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IBM PC DOS 1.00

PC DOS 1.00 was completed in August 1981 and announced at an IBM press conference on August 12, 1981, when IBM introduced the original IBM PC (Model 5150). It was released on one single-sided (160Kb) diskette, and included 23 BASIC Programs.

Directory Listing, Documentation, and Feature Summary are provided below. You can also dig into the PC DOS 1.00 Boot Sector using the PCjs Debugger.

IBM PC, 64Kb RAM, Dual Floppy Drives, MDA

Monochrome Display
Caps
Num
Scroll
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
Esc
1 !
2 @
3 #
4 $
5 %
6 ^
7 &
8 *
9 (
0 )
- _
= +
Back
-
Num
Scroll
Tab
Q
W
E
R
T
Y
U
I
O
P
[ {
] }
7
↑ 8
9
Ctrl
A
S
D
F
G
H
J
K
L
; :
' "
` ~
← 4
5
→ 6
+
Shift
\ |
Z
X
C
V
B
N
M
, <
. >
/ ?
Shift
PrtSc
1
↓ 2
3
Alt
Space
Caps
Ins 0
Del .
Esc
Tab
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
Num
Scroll
1 !
2 @
3 #
4 $
5 %
6 ^
7 &
8 *
9 (
0 )
- _
= +
Back
-
+
Q
W
E
R
T
Y
U
I
O
P
[ {
] }
7
↑ 8
9
A
S
D
F
G
H
J
K
L
; :
' "
` ~
← 4
5
→ 6
\ |
Z
X
C
V
B
N
M
, <
. >
/ ?
Shift
PrtSc
1
↓ 2
3
Ctrl
Shift
Alt
Space
Caps
Ins 0
Del .

Directory of PC DOS 1.00

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

IBMBIO   COM*     1920   7-23-81
IBMDOS   COM*     6400   8-13-81
COMMAND  COM      3231   8-04-81
FORMAT   COM      2560   8-04-81
CHKDSK   COM      1395   8-04-81
SYS      COM       896   8-04-81
DISKCOPY COM      1216   8-04-81
DISKCOMP COM      1124   8-04-81
COMP     COM      1620   8-04-81
DATE     COM       252   8-04-81
TIME     COM       250   8-04-81
MODE     COM       860   8-04-81
EDLIN    COM      2392   8-04-81
DEBUG    COM      6049   8-04-81
LINK     EXE     43264   8-04-81
BASIC    COM     10880   8-04-81
BASICA   COM     16256   8-04-81
ART      BAS      1920   8-04-81
SAMPLES  BAS      2432   8-04-81
MORTGAGE BAS      6272   8-04-81
COLORBAR BAS      1536   8-04-81
BUG      BAS       640   8-04-81
CALENDAR BAS      3840   8-04-81
MUSIC    BAS      4224   8-04-81
DONKEY   BAS      3584   8-04-81
BLUE     BAS      1152   8-04-81
HUMOR    BAS       640   8-04-81
POP      BAS       768   8-04-81
FORTY    BAS       768   8-04-81
DANDY    BAS       640   8-04-81
MARCH    BAS       768   8-04-81
STARS    BAS       768   8-04-81
HAT      BAS       768   8-04-81
SCALES   BAS       640   8-04-81
SAKURA   BAS       512   8-04-81
CIRCLE   BAS      1664   8-04-81
PIECHART BAS      2304   8-04-81
SPACE    BAS      1920   8-04-81
BALL     BAS      2048   8-04-81
COMM     BAS      4352   8-04-81
       40 file(s)     144725 bytes
                        6144 bytes free

CHKDSK reports:

          40 disk files
      160256 bytes total disk space
        6144 bytes remain available

Documents

Feature Summary

Courtesy of PC DOS Retro:

Summary of Internal Commands

Summary of External Commands

Additional Utilities

Notes:

Documents