If I'm careful I can just see it set the INTAD (INTFAD = 0x0100) flag before it clears it with SKIT FAD.
I set a breakpoint at 10F with "bpset 10F" and then step about 55 instructions or so with "s 55".
Sunday, February 14, 2016
Observing the interrupt flags
In the mame debugger I can see most of the cpu registers, but IRR (interrupt flags) isn't visible. However, it does show up as uPD7810/:centronics:ap2000:maincpu/0/m_irr in a memory view window.
If I'm careful I can just see it set the INTAD (INTFAD = 0x0100) flag before it clears it with SKIT FAD.
I set a breakpoint at 10F with "bpset 10F" and then step about 55 instructions or so with "s 55".
If I'm careful I can just see it set the INTAD (INTFAD = 0x0100) flag before it clears it with SKIT FAD.
I set a breakpoint at 10F with "bpset 10F" and then step about 55 instructions or so with "s 55".
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment