Atari030 wrote:I'll let you know if I work it out.
gilles504 wrote:this is not a "video" problem, video is generated and seems stable. but it can be many things.
Does this pattern appears immediately at boot? does a reset makes something?
Are your roms in the correct sockets and in good condition?
gilles504 wrote:it could also be a processor stuck on reset state, or bad bus buffers. do you have a basic logic analyzer or at least a multimeter to check voltages?
gilles504 wrote:check also voltage on 18 (reset (also check when pressing reset)).
and voltage (and frequency if possible) on A1 to see if there is some activity on address bus.
It's just to eliminate a reset issue.
Atari030 wrote:From the looks of it, RAM. I have progressed to a black screen with white boarders toying with it. Unfortunately, with a Mega 4 that is a ton of RAM. What board revision are you running?
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