chore: tick on memory access instead of 1cpi

2022-03-29 08:50:12 -03:00
parent 29da7b294e
commit 7f555095f2
2 changed files with 17 additions and 5 deletions
--- a/src/emu.zig
+++ b/src/emu.zig
@@ -43,9 +43,9 @@ pub fn run(kind: RunKind, quit: *Atomic(bool), fps: *FpsAverage, sched: *Schedul
 }

 pub fn runFrame(sched: *Scheduler, cpu: *Arm7tdmi, bus: *Bus) void {
-    var cycles: u64 = 0;
-    while (cycles < cycles_per_frame) : (cycles += 1) {
-        sched.tick += 1;
+    const frame_end = sched.tick + cycles_per_frame;
+
+    while (sched.tick < frame_end) {
        _ = cpu.step();

        while (sched.tick >= sched.nextTimestamp()) {