PET 2001 oddity - test-drb@ccmp.vtda.org

18 Jan 2003

Hi, Ade.

On Jan 18, 12:55, Adrian Vickers wrote:

...
  It's not *quite* as bad as all that, it uses
2114's. Although they're not
 made of unobtainum, they ARE made of "rareium" (or R@RE!ium on eBay -
 probably the *WOW* *L@@K* isotope, knowing my luck :). 
Good!  If it *is* a RAM fault, and you can't find one at a reasonable
price, let me know.  I think I still have a small number spare.

...
  AFAICT, these are version 1 ROMs. Every socket is
filled, and they're all
 MOS6540s. 
Drat.  Let's hope it's not a ROM fault.  Sadly, my copy of "The PET
Revealed" with its mostly-legible (!) circuit diagrams, shows the later
board with 2332s.  But I do have a copy of the MPS6540 pinout somewhere.

...
  Harrumph. Guess which one it has...

 Still, I've no fear of making carriers, etc. - albeit time constraints &
 lack of equipment will make it tough right now - at least until I can get
 my MicroMAT going.

 >The good news, though, is that I have a
 >chicklet-keyboard 2001-N as well, and if necessary, I could probably do a
...
  ROM dump for
you (though IIRC it used to be on the 'net somewhere).  I
wouldn't need to move more than a few hundreweight of stuff to get at it
;-) 
 That might be cool (and *snap* about the tons of stuff, although having
 seen your little collection I think you do have rather more to shift about
...
  than me!). However, let me try out the RAM swapping
& chip re-seating
 first, and if that doesn't fix it, then we'll look into EPROMs &
suchlike.

OK.  Give me shout if you want me to start burrowing.  Or come and pay a
visit...

-- 
Pete						Peter Turnbull
						Network Manager
						University of York