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mos6522: record last_irq_levels in mos6522_set_irq()

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To detect edge-triggered IRQs it is necessary to store the last state of each
IRQ in a last_irq_levels bitmap.

Note: this is a migration break for machines which use mos6522 instances which
are g3beige/mac99 (PPC) and q800 (m68k).

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220305150957.5053-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland 2022-03-05 15:09:54 +00:00
parent 409e9f7131
commit d4454e41d7
2 changed files with 10 additions and 2 deletions
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1
include/hw/misc/mos6522.h
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@ -133,6 +133,7 @@ struct MOS6522State {
uint64_t frequency;
qemu_irq irq;
uint8_t last_irq_levels;
};
#define TYPE_MOS6522 "mos6522"