box swap

chip8_core/src/chip8_mnemonics.rs

@@ -178,18 +178,30 @@ struct Chip8Cpu {}
 
 struct Chip8System {
     registers: Chip8Registers,
-    screen: Chip8Display,
+    system_memory: [u8; 2048]
 }
 
 impl Chip8System {
-    pub fn tick(self: Self) {
+    pub fn tick(mut self) {
         println!(" Ticking Chip8System");
 
-        // Fetch...
-        // ...Decode...
-        // ...Execute
+        let next_instruction = self.system_memory[self.registers.ProgramCounter as usize] as u16;
+        println!("READ INSTRUCTION {next_instruction}");
+        self.registers.ProgramCounter += 0x2;
+
+        &self.delay_timer_tick();
+        &self.sound_timer_tick();
+
+        // self.screen.tick();
+    }
+
+    fn delay_timer_tick(&mut self) {
+        self.registers.DelayTimer = self.registers.DelayTimer - 1;
+
+    }
+
+    fn sound_timer_tick(&mut self) {
+        self.registers.SoundTimer = self.registers.SoundTimer - 1;
 
-      //  self.registers.tick();
-        self.screen.tick();
     }
 }

chip8_core/src/parts/Display.rs

@@ -15,13 +15,13 @@ impl Chip8Display {
             // ...64 columns
             for index_col in 0..=64 {
                 let offset = (index_row * 64) + index_col;
-                if (to_render.memory[offset]) {
+                if to_render.memory[offset] {
                     print!("*")
                 } else {
                     print!(" ")
                 };
             }
-            println!("");
+            println!();
         }
     }
 }