Posted By
C=Owl27
on 2020-11-01
16:33:54
 |  Re: Video Socket Pin5 is Another Audio Output. Proof.
Then there are programs, but for the SID?
And maybe these are not compatible with basic 3.5?
But I hope the commands are similar enough.
I could not find anything about audio input commands in the manual. (+4)
Yes there is something wrongish about my +4.
Some random startups are scrambled.
The reset button often doesn't work.
However sometimes I mash it in far enough it may work.
But often doesn't.
So I have to use on/off switch.
Other times I get random F key pressings.
Still other times random breaks.
It seems intermittent, once I get a clean startup it tends to stay working fine.
But when I load or run games then things tend to get a little screwy.
I suspect a bad PLA.
Somebody said it is rarely the PLA,
however I've heard it said that the 264 PLAs commonly fail.
By several people.
Funny enough I think someone here just had a bad PLA too.
But so far people here seem to think there is a short on thew board somewhere.
I removed the bottom shield already.
I can see that somebody has already replaced the 3+1 chips because their tarnish is newer.
However they still are not working.
This is how it came to me, the software not working.
And damn those chips are really in there.
And near the TED shield, so how am I going to get a 'grabber' in there?
I am afraid to use a flat head screw driver, and don't want to damage the board
underneath the chips.
Before I do anything,
I would really like to use the diag264.
I have a minipro tl866 and burned some st m27c512s.
Firsrt I burned just the 16k diag264, and this didn't work.
Then I quadrupled it to 64k,
But this only produced a single character filled on the screen, but nothing else.
I am using the openC16cart pcbs.
The headers are set to the website's suggestions.
Middle:Top:Top:Bot:Bot Middle:Top:Top:Bot:Bot
I don't know what else to do now.
I guess order some 27c128s instead and burn a 16k diag264 to it and try that.
Other then that just use the service manual suggestions and check the voltages and continuities.
And scan with a magnifying glass.
I could replace the 3+1 with the chips I burned, but wow those are hard to get out.
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