Quote:
Originally Posted by plasmab
It’s nothing to do with the vectors in ram/rom. It’s to do with the last 10 bytes in the rom. When an interupt happens the cpu puts the interrupt number on A1-A3 and sets all other address bits high. Because the Amiga answers with DTACK rather than VPA the CPU reads which vector to go to from ROM.
The sequence of bytes is
00 18 00 19 00 1A 00 1B 00 1C 00 1D 00 1E 00 1F
At the very top of rom
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When I read something like that, I get the feeling I've got a lot of things to learn for the ATX4000 project
