Search found 452 matches
- Sun Jul 31, 2011 5:38 pm
- Forum: Sinclair Misc
- Topic: No pcb serial Numbers, so any Lists of provenance?
- Replies: 5
- Views: 5210
Re: No pcb serial Numbers, so any Lists of provenance?
Never seen a 2C158E ULA, but plenty of the other 2 - the 2C184E version seems to fail more than the 2C210E version (have several '81's with duff 2C184E ULA's but never yet some across a duff 2C210E! :) ) As for 'buggy' ROM - there is a software test you can do to find out which it is (although not a...
- Mon Jul 11, 2011 10:45 pm
- Forum: Hardware
- Topic: Dodgy RAM pack
- Replies: 9
- Views: 5339
Re: Dodgy RAM pack
First thing is to check the three supply lines to the 4116(or equivalent) RAM chips - I've been told they're very touchy about voltages and whatever line powers up before the others! If any chip gets hot enough to make you swear when you touch it, it is definitely duff! I think the most likely probl...