0xrsydn/gameboy-rust
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feat(cpu): charge non-refill code at pipeline fetch addresses

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0xrsydn 2026-10-06 15:34:45 +07:00
commit 0650b60908
26 changed files with 413 additions and 46 deletions
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crates/gba-core/tests/timing.rs
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@ -128,7 +128,8 @@ fn stored_prefetch_phi_and_sram_settings_do_not_change_supported_bus_costs() {
#[test]
fn wait_states_change_when_a_timer_interrupt_is_sampled() {
for (waitcnt, entry_step, instructions, cycles) in [(0, 4, 3, 23), (0x18, 6, 5, 24)] {
// 20-cycle timer: four 6-cycle fetches or five 4-cycle fetches, then 3-cycle IRQ entry.
for (waitcnt, entry_step, instructions, cycles) in [(0, 5, 4, 27), (0x18, 6, 5, 23)] {
let mut memory = Memory::new(0xe280_0001_u32.to_le_bytes().repeat(64)).unwrap();
memory.write16(WAITCNT, waitcnt).unwrap();
memory.write32(TIMER_BASE, 0x00c0_ffec).unwrap(); // 20 cycles