BASIC-DOS
A PCjs Retro-Programming Project
Blog
Demos
Docs
Preview
Repo
BASIC-DOS
is on Twitter
Project maintained by
jeffpar
BASIC-DOS on an IBM PC AT with 640K, No Video, Two VT100 Terminals, and Debugger
IBM PC AT, 640Kb RAM, 10Mb Hard Disk, COM1, COM2, No Video, Debugger
None
PC DOS 1.00
PC DOS 1.10
PC DOS 2.00 (Disk 1)
PC DOS 2.00 (Disk 2)
BASIC-DOS 2.10 (Release)
BASIC-DOS 80-Column Demo
BASIC-DOS 40-Column Demo
BASIC-DOS 80-Column Split Demo
BASIC-DOS Multi-Page Demo
BASIC-DOS Protected Mode
BASIC-DOS Dual Monitor Demo
BASIC-DOS Multi-Console Demo
BASIC-DOS HD Serial Port Demo
BASIC-DOS HD VT100 Demo
BASIC-DOS Serial Debugger Demo
BASIC-DOS Monochrome Demo
BASIC-DOS 640K Monochrome Demo
BASIC-DOS Terminal Only Demo
BASIC-DOS HD Terminal Only Demo
BASIC-DOS HD Dual Terminal Demo
BASIC-DOS Protected Mode with VT100
BASIC-DOS Tests
Load
Save
Save HD
Default
16K
32K
48K
64K
96K
128K
160K
192K
224K
256K
288K
320K
352K
384K
416K
448K
480K
512K
544K
576K
608K
640K
Reset
6Mhz
PCjs Debugger
Enter
Clear
Run
Step
4.77Mhz
Speed:
Stopped
AX
0000
BX
0000
CX
0000
DX
0000
SP
0000
BP
0000
SI
0000
DI
0000
DS
0000
ES
0000
SS
0000
CS
0000
IP
0000
V
0
D
0
I
0
T
0
S
0
Z
0
A
0
P
0
C
0
PCx86
v2.26 © 2012-2026
Jeff Parsons
VT100 Terminal (COM1)
VT100 Display
Power
Full Screen
ON LINE
LOCAL
LOCKED
L1
L2
L3
L4
CAPS
CAPS LOCK
CTRL-C
BREAK
ESC
TAB
LINE FEED
SET-UP
VT100.js
v3.01 © 2012-2026
Jeff Parsons
VT100 Terminal (COM2)
VT100 Display
Power
Full Screen
ON LINE
LOCAL
LOCKED
L1
L2
L3
L4
CAPS
CAPS LOCK
CTRL-C
BREAK
ESC
TAB
LINE FEED
SET-UP
VT100.js
v3.01 © 2012-2026
Jeff Parsons
Copyright (c) 2020-2026
Jeff Parsons
Released under
MIT License