Problems with garbled screen on Commodore Pet 2001-16N.
I bought the Romulator (Ram/Rom) replacement and diagnostic board by bitfixer so I could test my Commodore pet 2001-16N.
I have a garbled screen issue and wanted to rule out a rom or ram issues.
Well I've now ruled out a ram or rom issue and the screen output is still bad.
I removed f10 character ROM (901447-10) the screen still filled but now was full of square blocks and not characters.
I believe with the chip removed it should read all pixels as ON and help verify the problem is the character ROM chip and not the related circuits that read the chip..
I have a few questions I could do with help with please.
What would be a good and reasonably priced Eprom programmer that will programme a 2716 Eprom? I think a replacement character ROM should be my next step?
Any suggestions on how to repair the faulty video output anyone?
Thanks in advance.
I bought the Romulator (Ram/Rom) replacement and diagnostic board by bitfixer so I could test my Commodore pet 2001-16N.
I have a garbled screen issue and wanted to rule out a rom or ram issues.
Well I've now ruled out a ram or rom issue and the screen output is still bad.
I removed f10 character ROM (901447-10) the screen still filled but now was full of square blocks and not characters.
I believe with the chip removed it should read all pixels as ON and help verify the problem is the character ROM chip and not the related circuits that read the chip..
I have a few questions I could do with help with please.
What would be a good and reasonably priced Eprom programmer that will programme a 2716 Eprom? I think a replacement character ROM should be my next step?
Any suggestions on how to repair the faulty video output anyone?
Thanks in advance.