[OpenBIOS] Graphics mode bios

Edwin Rhodes edwin_rhodes at hotmail.com
Sun Aug 19 12:38:49 CEST 2001

Hi, just read about your own graphics mode bios, cool, will you be releasing
the source code?
----- Original Message -----
From: "Arp Kruithof" <arpy at wish.net>
To: <openbios at elvis.informatik.uni-freiburg.de>
Sent: Thursday, August 16, 2001 3:27 PM
Subject: Re: [OpenBIOS] Graphics mode bios

> 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/Bernhard
> > 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
> 1980's [pure
> > assembler].
> > 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
> be:
> - 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
> hint).
> - 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
> supplied
> I should have most of that sitting on the bookshelf here so if you
> need to 'borough' the books let me know.
> Good luck
> Arp
> ------- End of forwarded message -------
> arpy at wish.net
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