Thread View: alt.msdos.programmer
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Started by Remy CARD
Thu, 22 Nov 1990 09:07
Object Files Format
Author: Remy CARD
Date: Thu, 22 Nov 1990 09:07
Date: Thu, 22 Nov 1990 09:07
19 lines
1368 bytes
1368 bytes
Hi all, I am looking for the MS/DOS object files format (.OBJ files) and libraries (.LIB files) format. Any information about this subject would be appreciated. Thanks by advance, +-----------------------------------o--------------------------------------+ | Remy CARD | E-mail : card@masi.ibp.fr | | Universite Pierre et Marie Curie | | | Laboratoire MASI, CNRS UA 818 | | | 4 Place Jussieu | Tel : +33 (1) 44.27.43.63 | | F-75252 PARIS CEDEX 05 | Fax : +33 (1) 46.34.19.27 | | FRANCE | Telex : UPMCSIX 200-145 F | +-----------------------------------o--------------------------------------+
Re: Object Files Format
Author: Ed Braaten
Date: Sat, 24 Nov 1990 11:49
Date: Sat, 24 Nov 1990 11:49
38 lines
2210 bytes
2210 bytes
card@masi.ibp.fr (Remy CARD) writes:
> Hi all,
> I am looking for the MS/DOS object files format (.OBJ files)
>and libraries (.LIB files) format.
OMF 86 files contain a number of records, with each record having
the following general format:
******************************************************
* record * record * record * checksum *
* type * length * data * *
* (1 byte) * (2 bytes) * (variable len) * (1 byte) *
******************************************************
The Intel specification for 8086 OMF is contained in:
"8086 Relocatable Object Module Formats" Order Number 121748-001.
This is the format used by the Intel development tools for the
8086/88/186/188's. Microsoft made some minor changes to OMF 86
for debugging support, and for libraries. There was an excellent
article on OMF 86 and Microsoft's extensions in PC Tech Journal
a number of years ago. Perhaps someone out there could post the
issue number...
Years ago, I wrote a utility that "dis-assembled" OMF 86 files.
Unfortunately, I re-wrote it and the "new-and-improved" utility
only dis-assembles OMF386. If someone is interested in finishing
the code for OMF 86 files, e-mail me. Maybe the finished code
would be a candidate for comp.sources.misc...
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Ed Braaten | "... Man looks at the outward appearance,
Work: ed@imuse.de.intel.com | but the Lord looks at the heart."
Home: ed@alt.dah.sub.org | 1 Samuel 16:7b
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