MS-DOS 1.25: Difference between revisions

Revision as of 09:30, 13 April 2019

MS-DOS 1.25 is the first version of MS-DOS, released in 1982-08. It was the first version licensed to OEMs beyond IBM or Seattle Computer Products^[1] It only supported 5.25" 160 kB floppies and did not support folders (all files had to be located in the root directory). The command interperter, COMMAND.COM, supported these commands:

DIR
TYPE
COPY
ERASE
RENAME
PAUSE
REM

The source code for this version was released on 25 March 2014 by Microsoft and the Computer History Museum, along with a note from Tim Paterson from December 2013.

References

↑ https://winworldpc.com/product/ms-dos/1x

[1] ttps://winworldpc.com/product/ms-dos/1x

[1]

@@ Line 1: / Line 1: @@
+'''MS-DOS 1.25''' is the first version of [[MS-DOS]], released in 1982-08. It was the first version licensed to OEMs beyond IBM or Seattle Computer Products<ref>https://winworldpc.com/product/ms-dos/1x</ref>
+It only supported 5.25" 160 kB floppies and did not support folders (all files had to be located in the root directory). The command interperter, <code>COMMAND.COM</code>, supported these commands:
+*DIR
+*TYPE
+*COPY
+*ERASE
+*RENAME
+*PAUSE
+*REM
 The source code for this version was released on 25 March 2014 by Microsoft and the Computer History Museum, along with a note from Tim Paterson from December 2013.
-From: Tim Paterson
+== References ==
-To: Len Shustek
-Date: Mon, 16 Dec 2013 10:34:17 -0800
-Subject: RE: Source code to MS-DOS 1.0
-I have found and attached the source code for MS-DOS 1.25 as shipped by Seattle Computer Products. Version 1.25 was the first general release to OEM customers other than IBM so was used by all the first clone manufacturers.
-IBM's DOS 1.1 corresponds to MS-DOS 1.24. There is one minor difference between 1.24 and 1.25, as noted in the revision history at the top of MSDOS.ASM.
-Of the file attached, only STDDOS. ASM/MSDOS.ASM (DOS main code) and COMMAND.ASM (command processor) would have been used by an OEM other than Seattle Computer. The other files:
-IO.ASM - I/O system unique to SCP (equivalent to ibmbio.sys).
-ASM.ASM & HEX2BIN.ASM - Old 8086 assembler developed by SCP (used to assemble older version of DOS).
-TRANS.ASM - Z80 to 8086 assembly source code translator developed by SCP.
-I also have a 6” stack of printouts of assembly listings for some of these and probably other related programs.
-Tim Paterson
-Paterson Technology
-http://www.patersontech.com/