> one thing: my IRQ routine also changes $dd00. I've patched my IRQ routine so [..] > loader still causes the screen to flicker -- it seems like it assumes $dd00 You can't actually make the loader "$dd00-free", because it can be interrupted between lda $dd00 and sta $dd00 anyway. If you need to change $dd00 to display something, you need to stay in the interrupt until $dd00 doesn't matter anymore. You could make a hack in the interrupt routine to check where the loader was interrupted (read the return address from the stack) and fix the A register value (in the stack), but that would take in the order of hundreds of cycles (100-200?) for each interrupt. -Pasi -- "Your Ambassador Delenn has a wonderful phrase: 'Faith *manages*.'" -- Brother Theo to Sheridan in Babylon 5:"Passing Through Gethsemane" - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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