[Coco] Undocumented opcode $3E

Torsten Dittel Torsten at Dittel.info
Mon Jan 26 04:49:33 EST 2004


Hi,

does anyone know how the undocumented RESET opcode $3E exactly works? Is
just the 6809 reset? What about the interrupts? CoCoMax2 is using that
instruction to quit. Some of the emulators ignore it (and stay by
coincidence in an endless loop doing something unspeficic), some will
hang.

You can try:

POKE&H6000,&H3E:EXEC&H6000

on a real CoCo to see what happens.

Torsten




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