Cheap board guy
jnc at mercury.lcs.mit.edu
Fri Aug 21 19:11:37 CDT 2015
> I lucked out. One of the dead ones had a broken trace on the bottom, and
> cracked corner of the socket for one of the big square chips.
So does that one work now?
> The second one started working after I simply re-seated the two square
> chips around their sockets.
Yeah, that happens a lot. I got an 11/23 from him, it didn't work at first, I
re-seated the CPU and MM chips, and now it seems to be fine.
Excellent news, though!
> Well, now both my 11/23 and 11/73 CPUs work with the MSV11-DB cards.
Right, those are Q18.
> a Clearpoint(?) Q22 memory card
Camminton makes 2MB dual cards (CMV-504, although you can upgrade partially
populated ones, which have a different number - 254, 500, 250); alas, the last
one on eBay just sold, although there may be some out there from dealers like
Continental). National Semi makes 1MB dual cards (NS23C - well, the manual
says they are only 256KB, but they can be upgraded to 1MB with 256Kx1 chips,
and a couple of simple etch cuts).
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