3B1 emulator: IT BOOTS! (sort of)
ard at p850ug1.demon.co.uk
Wed Dec 15 13:10:53 CST 2010
> > As you know, I am mch more of a hardware person, but I have talked ot the
> > 1793 etc disk controllers (and the 279x is much the same as a 179x with
> > some of the support chips built-in). If oyu have any specific questions I
> > will see what I can rememebr...
> > I also have the data sheets for both these chips if you don't have them
> I pulled them from Bitsavers (they're in the Storage Products Databook),
I think I have that book on paper... It's certainly something like that.
> but thanks for the offer. The WD1010 Winchester controller appears to
> behave a bit like an old-style (CHS-addressed, pre-LBA) IDE hard drive,
> just with an 8-bit host data bus instead of 16-bit...
And this is suprising?
Remember the original PC/AT contriller was actually a Western Digital
board, with a WD1010 on it (I have just checked thr board I removed from
this machine when I put an IDE card in). And that IDE was designed to be
software compatible with the original IBM/Western Digital controller,
just with much of the electronics in the drive (hence the name).
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