Posted By
SVS
on 2014-09-06
05:48:48
 |  Re: New to Plus4 scene - Introduction and SD2IEC and 1541 loading issues
If I can add some words,
BREAK
PC SR AC XR YR
; 2D6D 31 10 00 F6
The Break status means that system running has met a $00 instead of a valid 8501 code. Look at $2D6B: the value is surely a $00. The problem is why system has jumped to that location, that is not inside O.S., during its operations: this could even means a problem in the ROM.
Check the SP too (it should be shown after the "PC SR AC XR YR" of the break message. If it is too low (say under $B0) problem is the ROM.
Another check to do is, after the break, to test color keys (CTRL+1, CTRL+2, etc.). If the colors are not the standard ones, then it is confirmed the stack was overflow (and it should not).
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