Fix index check

hal/instructions.go

@@ -105,10 +105,6 @@ var InstructionIn = &Instruction{
 var InstructionLoad = &Instruction{
 	Name: "LOAD",
 	ExecuteWithOperand: func(module *Module, operand float64) error {
-		index := int(operand)
-		if len(module.register) <= index {
-			return fmt.Errorf("index %d exceeds register size of %d", index, len(module.IO))
-		}
 		module.accumulator = module.mmu.Read(Address(operand))
 		return nil
 	},
@@ -125,10 +121,6 @@ var InstructionLoadNum = &Instruction{
 var InstructionStore = &Instruction{
 	Name: "STORE",
 	ExecuteWithOperand: func(module *Module, operand float64) error {
-		index := int(operand)
-		if len(module.register) <= index {
-			return fmt.Errorf("index %d exceeds register size of %d", index, len(module.IO))
-		}
 		module.mmu.Write(Address(operand), module.accumulator)
 		return nil
 	},
@@ -204,11 +196,6 @@ func newMathInstruction(name string, operation func(accumulator, register float6
 	return &Instruction{
 		Name: name,
 		ExecuteWithOperand: func(module *Module, operand float64) error {
-			index := int(operand)
-			if len(module.register) <= index {
-				return fmt.Errorf("index %d does not exist in register", index)
-			}
-
 			param := module.mmu.Read(Address(index))
 			module.accumulator = operation(module.accumulator, param)
 			return nil