tim at swift.amat.com
Mon Jul 5 11:27:11 CEST 1999
I am wondering if anyone has any recommendations for a general book which covers
x86 assembly, with a decent overview of x86 system architecture. I've previously
only used 680x0 assembly. So far, I've found this book in my local book shop:
Which looks quite good, but isn't exactly cheap! I downloaded the PPro reference
manuals as PDFs from Intel, and although they seem pretty well written, they're
only really useful as a technical reference.
Kevin P Lawton wrote:
> > this BIOS, but I still think it is the way it should be done, since if=20
> > you want a 16-bit (old and crappy) IBM-PC compatible BIOS, you just keep
> > the one that is in your computer right now.
> > So because of this I believe that your project won't benefit from my work
> > since you will need an IBM-PC compatible BIOS, right?
Well, not necessarilly. As I've said - I don't know very much about the i386
architecture, but this is what I was thinking:
. Do minimum required in 16bit mode
. Switch to 32bit mode
. Machine setup
. Options/setup menu option
. Insert your must-have feature here ;-)
. Boot strap operating system
Wouldn't it be possible to add 16 bit support as a module which gets loaded at
bootstrap stage? Either as a replacement 16 bit BIOS which is loaded by the
32bit one, how about trying to provide a 16bit interface with the 32bit BIOS
(although I'm not sure this is possible (32 bit disk drivers for DOS?), I don't
really know a lot about the x86, outside of 32 bit userland!).
> Actually, for booting a 32-bit OS, your BIOS may work.
> I have no problem having an optional 32bit only BIOS.
> We definitely a 16-bit one though for MS stuff though.
Yes, I agree - I seem to hit an average of about 2 irritating problems a week
caused by old and buggy PC BIOSs, and this is the only way I'll be able to flash
the lot into oblivion! ;-)
> Actually, please join the developers list for freemware,
> and post something there about it. 16-bit stuff complicates
Hmm, development tools. Can anyone see any obvious pitfalls in using software
like Bochs, and vmware for development and debugging?
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