3B1 emulator: IT BOOTS! (sort of)

[Tony Duell]

> > 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).

-tony