Start executing some code!

cpu/cpu.go

@@ -15,11 +15,13 @@ type CPU struct {
 	opcodes *isa.Opcodes
 }
 
-func (cpu *CPU) Step(mmu *mem.MMU) {
+func (cpu *CPU) Step(mmu *mem.MMU) uint8 {
 	inst := cpu.fetchAndDecode(mmu)
-	nextPc, _ := cpu.Execute(mmu, inst)
+	nextPc, cycles := cpu.Execute(mmu, inst)
 
 	cpu.PC.Write(nextPc)
+
+	return cycles
 }
 
 func (cpu *CPU) fetchAndDecode(mmu *mem.MMU) *isa.Instruction {

hardware/dmg.go

@@ -27,6 +27,8 @@ func NewDMG() (*DMG, error) {
 	ram := make([]byte, 0xFFFF)
 	mmu := mem.NewMMU(ram)
 
+	cpu.ResetToBootROM() // TODO: Load an actual boot ROOM
+
 	return &DMG{
 		cpu: cpu,
 		mmu: mmu,
@@ -55,3 +57,15 @@ func (dmg *DMG) DebugPrint() {
 		dmg.cartridge.DebugPrint()
 	}
 }
+
+func (dmg *DMG) Step() bool {
+	dmg.cpu.Step(dmg.mmu)
+
+	return true
+}
+
+func (dmg *DMG) Run() {
+	for dmg.Step() {
+
+	}
+}

main.go

@@ -72,5 +72,6 @@ func main() {
 
 		log.Println("Loaded cartridge successfully")
 		dmg.DebugPrint()
+		dmg.Run()
 	}
 }