BASIC-DOS

A PCjs Retro-Programming Project

BASIC-DOS is on Twitter Project maintained by jeffpar

BASIC-DOS on an IBM PC XT with Dueling Monitors

The machine below is an IBM PC XT (Model 5160) with a 4.77Mhz 8088, 640K of memory, two monitors (a Monochrome Display and a Color Display), two diskette drives, and a 10Mb hard disk. It boots the BASICDOS-360K-MULTI diskette and runs FOUR sessions, two on each monitor. Since the machine has a hard disk, the boot sector first displays Press a key to start... on the Monochrome Display; press any key (or wait 5 seconds) to boot from the diskette, or press Esc to boot from the hard disk instead.

IBM PC XT, 640Kb RAM, 10Mb Hard Disk, MDA and CGA

Monochrome Display
Color 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 .

Use SHIFT-TAB to move keyboard focus from one session to the next.

This demo is also available on an IBM PC, an IBM PC AT, and a COMPAQ DeskPro 386.

The BASICDOS-360K-MULTI diskette’s CONFIG.SYS runs FOUR sessions, two on each monitor. Use SHIFT-TAB to move keyboard focus from one session to the next.

CONFIG.SYS from the BASICDOS-360K-MULTI Diskette

REM Demonstration of dual monitors with multiple sessions per monitor
FILES=20
BUFFERS=4
SESSIONS=8
DEBUG=COM1:9600,N,8,1,0
CONSOLE=CON:40,25,0,0,1
SHELL=COMMAND.COM PATH$="A:\;A:\BIN;A:\SAMPLES;A:\DEMOS":FIBO.BAT
CONSOLE=CON:40,25,40,0,1
SHELL=COMMAND.COM PATH$="A:\;A:\BIN;A:\SAMPLES;A:\DEMOS":PRIMES.EXE
CONSOLE=CON:80,15,0,0,1,1
SHELL=COMMAND.COM PATH$="A:\;A:\BIN;A:\SAMPLES;A:\DEMOS":COLOR 7,1:PIPES.BAT
CONSOLE=CON:80,10,0,15,1,1
SHELL=COMMAND.COM PATH$="A:\;A:\BIN;A:\SAMPLES;A:\DEMOS":HELLO.BAT

Copyright (c) 2020-2026 Jeff Parsons Released under MIT License