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Opry99er

Help me troubleshoot

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I'd start with ram.. the program table is corrupt.

 

How does one check the RAM without replacing the chips one by one? Is there a program that can do that?

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How does one check the RAM without replacing the chips one by one? Is there a program that can do that?

Stack good ram on top of the old ram

 

Sent from my LG-H872 using Tapatalk

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You could use VMBR through CALL LINK from MINIMEMORY to copy VDP RAM to CPU RAM than compare.

If you have an FG99 you can save the MINIMEMORY image back to SD CARD than do a side by side with a HEXEDITOR(in sections).

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In the previous comment I had meant to suggest using this procedure on both the console in question and on a similar console that is known to be good. Than comparing the generated code.

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