gilligan wrote:
Sorry in case i am missing something obvious here, but i can't seem
to find info on if/how I can trigger an IRQ on the /CART line from
software. Is that possible at all?
Thanks!
I assume you're referring to the /IRQ line on the cartridge connector, not the /CART line.
Unless I'm completely mistaken, /IRQ is an input to the SNES CPU only.
Enabling the SNES CPU to process irqs via this line (from external hardware or internal h/v-counters) requires the cpu I-flag to be clear.
If you want the SNES CPU to issue irqs to external hardware, you'll most likely have to create additional circuitry.
Playing it cheap and using an adress line or some other unused line to generate irqs might just work aswell, but you'd have to make sure the receiving device is able to capture these fast enough and in all cases.