It's been a hell of a week!, er WEEKS, MONTHS! VERY OT

[Tony Duell]

> It's worth noting, in defense of the earliest PeeCee hardware, that it's
> composed entirely of plain generic chips which are well documented. 
> There's no proprietary 'chipset' in the motherboard of my IBM PC-AT,
> just TTL goodness and some Intel 82xx LSI chips.  And all the schematics

Actually, there are also a few PALs (or HALs, which are the 
mask-programmed version), a couple of address decoder PROMs, and the 
keyboard controller microcontorller ROM which are _not_ documented 
officially. 

But the IBM TechRefs for the PC, XT, AT, PCjr are very well produced 
documents, full of information. It's a pity this stopped with the PS/2 -- 
I have the PS/2 Hardwre Interface Technical Refernce, and there are no 
schematics or anything like that. It's still a useful manual, though.

It's also a pity the PC hardware was so mis-designed...

-tony