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48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…
I understand. I have spent maybe 3x what the machine is worth to get my issue 2 up and running. However, I consider it a long term project and it is my hobby, so it is ok for me.
Did your machine work before you soldered the cpu into a socket? -
48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…
... socket that solved my 48K issue 2 not running when I pressed ... -
Official CSSCGC 2012 Competition Threadcsscgc2012 already got it's first entry (from R-Tape) :) So I'm almost forced to start the new official csscgc thread here. The official c.s.s Crap …
... on a 48K rubber keyed Issue 2 Spectrum.
Though I ... -
ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…
... order as I have a issue 2 48k board I want to ... -
Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
Replacing ram and replacing all logic, cpu, ula etc. does not help. The problem is somewhere on the PCB and I am unable to find it. I guess there is not much more to do than to scrap this ZX and look for a new Issue 2 to restart the project. -
ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…
... ;641553]as I have a issue 2 48k board I want to ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
My DivIDE built by Velesoft works with both my Issue 4S 48k machine and my issue 2 48k machine (before failed upgrade that rendered it inoperable). -
Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…
... Dickens ISBN 0 86161 115 2 (on page 49 of my ... documents the upgrades to the Issue 2 and 3 boards. This thread ... plug in daughterboard for the Issue 1 model. -
Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…
... documents the upgrades to the Issue 2 and 3 boards. This thread ... plug in daughterboard for the Issue 1 model.[/QUOTE]
issue 1 and issue 2 Speccy boards...
