Added sound checks, instructions and timers.

Also added some more test roms for later checks.

src/machine/display.odin

@@ -4,7 +4,6 @@ import rl "vendor:raylib"
 
 // Handle the "display" and all of its required functions
 // raylib window, rendering, scale constants
-
 SCALE :: 20
 SCREEN_WITDH :: 64 * SCALE
 SCREEN_HEIGHT :: 32 * SCALE
@@ -12,10 +11,13 @@ CYCLES_PER_FRAME :: 12
 
 // Display will handle all the screen drawing with raylib etc
 run_system :: proc(s: ^System) {
-	rl.InitWindow(SCREEN_WITDH, SCREEN_HEIGHT, "chip8")
+	rl.InitWindow(SCREEN_WITDH, SCREEN_HEIGHT, "raylib")
+	rl.InitAudioDevice()
 
 	rl.SetTargetFPS(60)
 
+	beep := rl.LoadSound("./beep.wav")
+
 	for !rl.WindowShouldClose() {
 		rl.BeginDrawing()
 		rl.ClearBackground(rl.BLACK)
@@ -26,14 +28,26 @@ run_system :: proc(s: ^System) {
 			handle_input(s)
 			cycle(s)
 		}
-		if s.delay_timer > 0 { s.delay_timer -= 1 }
-		if s.sound_timer > 0 { s.sound_timer -= 1 }
+
+		// Handle delay timer
+		if s.delay_timer > 0 do s.delay_timer -= 1
+
+		// Current sound file is around 1s so stop
+		// immediately when timer is 0
+		if s.sound_timer > 0 {
+			s.sound_timer -= 1
+			if !rl.IsSoundPlaying(beep) do rl.PlaySound(beep)
+		} else {
+			rl.StopSound(beep)
+		}
 
 		render_display_buffer(&s.display)
 
 		rl.EndDrawing()
 	}
 
+	rl.UnloadSound(beep)
+	rl.CloseAudioDevice()
 	rl.CloseWindow()
 }