15 Jul
2006
15 Jul
'06
1:15 p.m.
On Saturday 15 July 2006 04:25 pm, Jules Richardson wrote:
I'd also like to test the RAM - I've got two
choices there...
1) Somewhere we have a RAM tester that may well cope with the ICs used in
the PET - problem is that it got packed up when we were going to move
buildings/sites and laying my hands on it in the near future might be
tricky.
2) I could maybe build something to hang off the PC parallel port and do
the job. It probably only needs a couple of latch ICs to latch the address,
plus control lines wired to the parallel port. Only downside is that I
wouldn't be able to drive the RAM at the frequencies found in the PET, so
it might not show up all errors.
If you do come up with something that'll hang off the parallel port, I'd sure
be interested in seeing it. I don't think that exercising parts at the same
speed they normally run at is going to be that critical, but I do think that
a lot of what I've seen with bad RAM is that it either works or it doesn't,
mostly.
If this is platform-indepenent then so much the better. :-)
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin