Reduce code duplication

Source/Payload.rs

@@ -0,0 +1,33 @@
+use crate::Machine;
+use crate::Types::{Byte, Word};
+
+pub type RegisterAddress = (Byte, Word);
+pub type AddressRegister = (Word, Byte);
+pub type Register = Byte;
+pub type TwoRegisters = (Byte, Byte);
+pub type ThreeRegisters = (Byte, Byte, Byte);
+
+#[inline]
+pub fn GetRegisterAddress(vm: &mut Machine) -> RegisterAddress {
+    (vm.ReadByte(None), vm.ReadWord(None))
+}
+
+#[inline]
+pub fn GetAddressRegister(vm: &mut Machine) -> AddressRegister {
+    (vm.ReadWord(None), vm.ReadByte(None))
+}
+
+#[inline]
+pub fn GetRegister(vm: &mut Machine) -> Register {
+    vm.ReadByte(None)
+}
+
+#[inline]
+pub fn GetTwoRegisters(vm: &mut Machine) -> TwoRegisters {
+    (vm.ReadByte(None), vm.ReadByte(None))
+}
+
+#[inline]
+pub fn GetThreeRegisters(vm: &mut Machine) -> ThreeRegisters {
+    (vm.ReadByte(None), vm.ReadByte(None), vm.ReadByte(None))
+}