I have a Commodore 600 series B128 (low profile
version similar to the
European 610) and I have been trying to diagnose a problem and fix. I do
not have diagnositcs for one of these guys to check the chips
automatically. When I power on the machine, it reports to be READY with
BASIC version 4. I can type one line of code (for example: 10
PRINT"TEST"), but when I hit enter, the cursor disappears and no more
screen IO can be generated. In other words, the cursor does not jump down
I had a C128 that behaved strangely -- generated random error mesasges,
moving the cursor around did very odd things,etc. It turned out to be a
bad DRAM chip in the first half of the memory map.
I know it's not exactly the same fault, but it could be related, and at
least the RAMs are easy to get...
-tony