im uploading it now on to youtube.
http://youtu.be/K6Oz98ILI9M
I'm fascinated by the code from the ROM , how is it edited and what code is it?
but it works really well, how ever I'm not sure what its telling me though...apart from good 16K ram and showing the CRT running. i presume it means the CPU is running as well?
Ive take some measurements on the CRT again and the regulator i thought had blown that was pulling 18v is now pulling 25v and getting pretty hot the spec sheet shows a max of 24v so maybe it is failing after all.
not sure.
When the PET is up and running i will check the CRT board in more detail , measure the caps , regs and resistors - something is failing. from a quick visual i can see the back of the tube is discoloured from the 22mm neck end up to about halfway up and then it changes back to the silvery colour that tubes should be - perhaps its just worn out?
Anyway any thoughts on the RAM problem ? I've studied the schematics and I'm stumped to be honest.
http://youtu.be/K6Oz98ILI9M
I'm fascinated by the code from the ROM , how is it edited and what code is it?
but it works really well, how ever I'm not sure what its telling me though...apart from good 16K ram and showing the CRT running. i presume it means the CPU is running as well?
Ive take some measurements on the CRT again and the regulator i thought had blown that was pulling 18v is now pulling 25v and getting pretty hot the spec sheet shows a max of 24v so maybe it is failing after all.
not sure.
When the PET is up and running i will check the CRT board in more detail , measure the caps , regs and resistors - something is failing. from a quick visual i can see the back of the tube is discoloured from the 22mm neck end up to about halfway up and then it changes back to the silvery colour that tubes should be - perhaps its just worn out?
Anyway any thoughts on the RAM problem ? I've studied the schematics and I'm stumped to be honest.
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