[OpenBIOS] Graphics mode bios
arpy at wish.net
Thu Aug 16 17:27:56 CEST 2001
From: Arp Kruithof <arpy at wish.net>
To: "zechmer" <cu0815 at compuserve.de>
Subject: Re: [OpenBIOS] Graphics mode bios
Send reply to: arpy at wish.net
Date sent: Thu, 16 Aug 2001 16:26:05 +0200
> Hello Gavin,
I certainly like the project - have been looking / thinking / dreaming
about an open source BIOS for x86 for some years (not openBIOS)
and some projects seem to be underway - I just have very little
time myself at the moment so for now I'll happily read along ...
> I once started writing my own BIOS which started already in
> graphics (hercules monochrome graphics) mode back in the
> I gave it up, because I couldn't init the keyboard correctly.
> Each time I requested port 60h it didn't leave anything there.
> Later I implemented the keyboard code from linux but this
> didn't help me and the 286 board at all.
> This was so frustrating, that I gave it up.
> Perhaps some suggestions?
Couldn'r resist reacting to the keyboard issue Bernhard mentioned.
That shoudn't be too hard to do I think. A couple of sources might
- IBM AT Technical Reference which has a complete BIOS source
listing - just to pick up on some tech details or ideas (not
sugesting you copy the code just that reading it may give you a
- 8042 datasheets for timing details etc. on original chip used
- Datasheets for popular chipsets that emulate the gate A20 &
keyboard interface - they may even come with sample code
I should have most of that sitting on the bookshelf here so if you
need to 'borough' the books let me know.
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arpy at wish.net
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