Crude drawing call for now just to test.

src/machine/display.odin

@@ -8,20 +8,35 @@ import rl "vendor:raylib"
 SCALE :: 20
 SCREEN_WITDH :: 64 * SCALE
 SCREEN_HEIGHT :: 32 * SCALE
+CYCLES_PER_FRAME :: 12
 
 // Display will handle all the screen drawing with raylib etc
-init_display_and_cycle :: proc(s: ^System) {
+run_system :: proc(s: ^System) {
     rl.InitWindow(SCREEN_WITDH, SCREEN_HEIGHT, "chip8")
+
     // Cap at 60hz/60fps
     rl.SetTargetFPS(60)
 
     for !rl.WindowShouldClose() {
         rl.BeginDrawing()
 
-        rl.ClearBackground(rl.WHITE)
+        rl.ClearBackground(rl.BLACK)
 
         // Do a cpu cycle
-        cycle(s)
+        for _ in 0..<CYCLES_PER_FRAME {
+            cycle(s)
+        }
+
+        // update display with display buffer bits
+        // get row
+        for y in 0..<len(s.display) {
+            // get cols
+            for x in 0..<len(s.display[0]) {
+                if s.display[y][x] == 0x01 {
+                    rl.DrawRectangle(i32(x * SCALE), i32(y * SCALE), SCALE, SCALE, rl.WHITE)
+                }
+            }
+        }
 
         rl.EndDrawing()
     }