pcjs/disks/pcx86/dos/ibm/0.90/debugger/README.md

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Markdown

---
layout: page
title: "PC-DOS 0.90 (with CGA and Debugger)"
permalink: /disks/pcx86/dos/ibm/0.90/debugger/
machines:
- type: pcx86
id: ibm5150-pcdos090
debugger: true
config: /devices/pcx86/machine/5150/cga/256kb/debugger/machine.xml
autoMount:
A:
path: /disks/pcx86/dos/ibm/0.90/PCDOS090.json
---
PC-DOS 0.90 (with CGA and Debugger)
-----------------------------------
There was no PC-DOS 0.90 product *per se*. It has been dubbed version 0.90 simply because it predates
[PC-DOS 1.00](../1.00/) by several months. More information about this preliminary version of PC-DOS can
be found at the [OS/2 Museum](http://www.os2museum.com/).
Below is an IBM PC (Model 5150) with an original IBM ROM BIOS and Color (CGA) Display that will boot PC-DOS 0.90.
A similar configuration with [Monochrome Display](/disks/pcx86/dos/ibm/0.90/) is also available.
The machine is configured to run at 4.77Mhz, so the ROM BIOS memory test has been disabled,
since a PC with 256Kb was rather slow to boot.
{% include machine.html id="ibm5150-pcdos090" %}
PC-DOS 0.90 files were distributed on one single-sided (160Kb) diskette. A directory listing of the disk is
provided below.
### Directory of PC-DOS 0.90 Diskette
Volume in drive A has no label
Directory of A:\
COMMAND COM 2576 05-29-81 12:00a
DEBUG COM 5450 05-27-81 12:00a
TIME COM 243 05-19-81 12:00a
DATE COM 245 05-20-81 12:00a
ASM COM 6389 05-15-81 12:00a
FORMAT COM 2048 05-29-81 12:00a
HEX2BIN COM 483 05-07-81 12:00a
BASIC COM 11008 06-04-81 12:00a
CHKDSK COM 1224 05-30-81 12:00a
EDLIN COM 2231 05-29-81 12:00a
MODE COM 675
COMMENTS 3561 06-05-81 12:00a
MOVBAS COM 128 04-23-81 12:00a
BAS18 COM 11008 06-04-81 12:00a
BASICA COM 14976 06-04-81 12:00a
AUTOEXEC BAT 24
SYS COM 896 06-03-81 12:00a
BAS18A COM 14976 06-04-81 12:00a
COMMENTS BAK 3560 06-05-81 12:00a
FCOMP COM 1408 04-13-81 12:00a
DISKCOPY COM 1211 06-04-81 12:00a
CONVERT COM 3200 04-15-81 12:00a
COMP COM 256 04-15-81 12:00a
KILO BAS 768 04-23-81 12:00a
20HAL COM 1792 04-24-81 12:00a
SPCWAR BAS 5120 05-22-81 12:00a
TTY ASC 2432 05-22-81 12:00a
VCOPY BAT 26 04-24-81 12:00a
SHIPS MAC 1792 06-01-81 12:00a
CIRCLE MAC 384 06-01-81 12:00a
RBAS COM 32768 04-25-81 12:00a
THREED BAS 3072
CUBE DAT 402 04-30-81 12:00a
33 file(s) 136332 bytes
8192 bytes free