tezza
Veteran Member
Hi,
With my newly arrived ROMS I've NEARLY got this Europlus fixed but not quite.
The system boots but the characters are all screwed up. For example...
The text SHOULD say :
APPLE ][
]THE QUUICK FOX JUUMPED OVER THE LAZY DO
G
]SYNTAX ERROR
]
(keybounce is bad on the U character)
It's like the characters are mirror images but with the furtherest left hand side of the character block missing.
Anyone know what causes this? I don't think it's any of the ICs because I've done a full substitution from a working machine, including the character generator. I suspect a static component, faulty socket or a dry solder joint maybe. But where? The symptom is distinct, and hopefully someone out there who knows Apples can tell me exactly where in the circuitry things are shifting phase (or whatever) and what I should test.
Thanks in advance.
Tez
With my newly arrived ROMS I've NEARLY got this Europlus fixed but not quite.
The system boots but the characters are all screwed up. For example...
The text SHOULD say :
APPLE ][
]THE QUUICK FOX JUUMPED OVER THE LAZY DO
G
]SYNTAX ERROR
]
(keybounce is bad on the U character)
It's like the characters are mirror images but with the furtherest left hand side of the character block missing.
Anyone know what causes this? I don't think it's any of the ICs because I've done a full substitution from a working machine, including the character generator. I suspect a static component, faulty socket or a dry solder joint maybe. But where? The symptom is distinct, and hopefully someone out there who knows Apples can tell me exactly where in the circuitry things are shifting phase (or whatever) and what I should test.
Thanks in advance.
Tez
Last edited: