mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 10:19:47 -04:00
Matthew Stanley
52eb8e8a24
Adapt the CD interrupt mask/status comparison from kem0x PR #14 and centralize it in a tested helper. The HC05 exposes numeric INT1..INT5 reasons but gates the line with a direct mask/status AND, so the common 0x07 mask must also pass INT4 and INT5. Source: https://github.com/mstan/psxrecomp/pull/14 Source-commit: https://github.com/mstan/psxrecomp/commit/dd9e5c65073dd41fbac2d965d2f945a866ec59e2 Co-authored-by: Kareem Olim <kareemolim@gmail.com>
16 lines
595 B
C
16 lines
595 B
C
#ifndef PSXRECOMP_CDROM_IRQ_H
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#define PSXRECOMP_CDROM_IRQ_H
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#include <stdint.h>
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/* HINTSTS bits 0..2 contain an encoded interrupt reason (INT1..INT5), not
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* independent one-hot flags. The controller nevertheless gates its IRQ line
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* by directly ANDing HINTSTS with HINTMSK. In particular, mask 0x07 enables
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* all five encoded reasons, including INT4 and INT5. */
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static inline int cdrom_irq_mask_matches_reason(uint8_t irq_enable,
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uint8_t irq_reason) {
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return (irq_enable & irq_reason & 0x07u) != 0;
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}
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#endif /* PSXRECOMP_CDROM_IRQ_H */
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