MS-DOS 1.25: Difference between revisions
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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. | 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 | |||
From: Tim Paterson | To: Len Shustek | ||
To: Len Shustek | |||
Date: Mon, 16 Dec 2013 10:34:17 -0800 | Date: Mon, 16 Dec 2013 10:34:17 -0800 | ||
Subject: RE: Source code to MS-DOS 1.0 | 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. | 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: | 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). | 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). | 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. | 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. | I also have a 6” stack of printouts of assembly listings for some of these and probably other related programs. | ||
Tim Paterson | Tim Paterson | ||
Paterson Technology | Paterson Technology | ||
http://www.patersontech.com/ | http://www.patersontech.com/ | ||
Revision as of 04:37, 27 March 2014
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 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/
