Add note to BSOUT/CHROUT about it `cli`ing

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Open mooinglemur opened 4 months ago

mooinglemur commented 4 months ago

BSOUT / CHROUT (and PRIMM since it calls BSOUT) will cli before returning. This is legacy C64 behavior. We should document that it does this.

C64 disasm rom addr $E6B3 @ https://www.pagetable.com/c64ref/c64disasm/ near the label LOP2

DragWx commented 1 week ago

Please do, I ran into this and it caught me off-guard when I was trying to use BSOUT to write text to the screen within a vblank ISR.

bbmdonut commented 2 days ago

I've been working on this - just want to wrap up one last tidbit (suggestions for workarounds), then I'll submit the PR.