0xrsydn/gameboy-rust
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feat(cpu): retain fetch access kinds across instruction execution

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0xrsydn 2026-10-06 16:53:05 +07:00
commit 86321f0071
21 changed files with 637 additions and 61 deletions
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4
crates/gba-core/tests/machine.rs
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@ -65,8 +65,8 @@ fn timer_demo_configures_hardware_in_cpu_code_and_handles_exactly_one_irq() {
assert_eq!(machine.cpu().registers()[10], 1);
assert_eq!(machine.memory().read16(IF).unwrap(), 0);
assert_eq!(machine.memory().read16(TIMER_BASE + 2).unwrap(), 0);
// IRQ entry gains five cycles before the timer stops; return loses five afterward.
assert_eq!(machine.memory().read16(TIMER_BASE).unwrap(), 0xfff9);
// Persistent fetch kinds move costs between setup instructions and the running timer.
assert_eq!(machine.memory().read16(TIMER_BASE).unwrap(), 0xfffb);
for _ in 0..100 {
assert_eq!(machine.step().unwrap(), StepKind::Instruction);
}