MS-DOS 1.x

Release notes

DOS 1.x was very limited in what it could do. It could start applications (.COM and .EXE), and process batch files (.BAT). PC-DOS 1.0 worked with 160KB floppies and did not support folders (all files had to be in the root). The command interpreter supported the following commands:

• DIR, TYPE, COPY, ERASE, RENAME
• PAUSE, REM

No pipes, redirection, or device drivers were supported. The DOS API in 1.0 was very limited.

MS-DOS 1.25, the equivalent of PC-DOS 1.10, was the first version licensed to OEMs beyond IBM or Seattle Computer Products.

Some vendors labeled their versions of MS-DOS with different names and version numbers. All of the versions here are believed to be based off of MS-DOS 1.25, even if the vendor called it something else.

Installation instructions

Important: Many of these OEM versions will only run on the specific computers they were designed for. Others may boot on an IBM PC, but certain devices or tools may not operate. Some require special disk formats or drive hardware, such as 8" floppy drives.

Most of these images need to be written with ImageDisk, or some other DOS based disk writer. WinImage can not handle the file system on most DOS 1.x disks.

Those that are compatible with the IBM PC (Such as the Columbia Data Products OEM) can be mounted and booted in an emulator such as MESS or PCE.

Please see the documentation included with each for specifics.

Wanted: Eagle 1600 MS-DOS 1.25 with hard disk diag disk.