Article View: comp.sys.ibm.pc.hardware
Article #18765BIOS EPROM checksum
From: Jan Eri
Date: Sun, 30 Jun 1991 23:47
Date: Sun, 30 Jun 1991 23:47
28 lines
1526 bytes
1526 bytes
hello,
Can anybody enlighten me on how the checksum in the PC BIOS
are calculated ? I suspect that the last byte are adjusted so
that the total checksum are nul, but I don't have an EPROM
burner handy, so I haven't bothered to experience.
I have several times patched BIOS'es to cope with unlisted
driveparameters, but so far I have solved the problem by adjusting
other entries in the drive table to avoid changing the checksum.
Also, does it exist any tools for simplifying this process?
I have tried two; CMOSER and HTMU, but none of them worked the
way I wanted them to :-(
Prefer Email,
Thanx, Jan
--
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l--/ l Jan Eri - - The Norwegian Institute of Technology , Acoustics
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Technical Details
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<1991Jun30.234734.27568@ugle.unit.no>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!snorkelwacker.mit.edu!hsdndev!cmcl2!uupsi!sunic!ugle.unit.no!lise.unit.no!janeriShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!snorkelwacker.mit.edu!hsdndev!cmcl2!uupsi!sunic!ugle.unit.no!lise.unit.no!janeri From: janeri@Lise.Unit.NO (Jan Eri) Newsgroups: comp.sys.ibm.pc.hardware Subject: BIOS EPROM checksum Message-ID: <1991Jun30.234734.27568@ugle.unit.no> Date: 30 Jun 91 23:47:34 GMT Sender: news@ugle.unit.no Reply-To: janeri@lise.unit.no Organization: Norwegian Institute of Technology Lines: 28