Bodged 16K RAM upgrade in issue one

Discussions about Sinclair ZX80 and ZX81 Hardware
Lardo Boffin
Posts: 2161
Joined: Sat Nov 26, 2016 2:42 am

Re: Bodged 16K RAM upgrade in issue one

Post by Lardo Boffin »

I'll admit to some moments of despair after having checked that none of the holes for the socket IC4 had shorts and that everything went where it should.
What I had obviously failed to consider was that various tracks go through the socket and do not (or at least should not) affect it - next time I will test all the tracks going through not just the sockets. :D

Lessons learned! That and I am still not very good a desoldering...
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
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