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Posted By

Harry Potter
on 2022-07-01
08:26:23

Re: 32k cartridge: proper IRQ addresses?

Thank you.

So, what's wrong with my Plus4Cart3 library? It is at https://sourceforge.net/projects/cc65extra/files/memory%20cfgs/. Also, my demo program for MemBankP4 doesn't work properly, either.

Posted By

siz
on 2022-07-01
07:40:10

Re: 32k cartridge: proper IRQ addresses?

The 7501/8501 processors don't have NMI pins so $fffa/$fffb is not a vector. The other vectors don't matter as the 264 series computers always map in the KERNAL ROM when accessing the $fc00-$ffff area and ROM is enabled.

Posted By

Harry Potter
on 2022-06-28
13:46:40

32k cartridge: proper IRQ addresses?

I believe I know what's wrong with my 32k Plus4 cartridge configuration for cc65: I'm not handling interrupts properly. What values should I put in the memory area $FFFA-$FFFF?