Shared via mypy Playground

main.py

from typing import Literal

Address = int
Data = int
Operation = Literal["read", "write"]

class AddressBus:
    def __init__(self) -> None:
        self._address: Address = 0x0000

    def read(self) -> Address:
        return self._address

    def write(self, address: Address) -> None:
        self._address = address

class DataBus:
    def __init__(self) -> None:
        self._data: Data = 0x0000

    def read(self) -> Data:
        return self._data

    def write(self, data: Data) -> None:
        self._data = data

class ControlBus:
    def __init__(self) -> None:
        self._operation: Operation = "read"

    def read(self) -> Operation:
        return self._operation

    def write(self, operation: Operation) -> None:
        self._oepration = operation

class Memory:
    def __init__(self) -> None:
        self._memory: dict[Address, Data] = {}

    def read(self, address: Address) -> Data:
        return self._memory[address]

    def write(self, address: Address, data: Data) -> None:
        self._memory[address] = data

class Processor:
    def __init__(self) -> None:
        self.address_bus = AddressBus()
        self.data_bus = DataBus()
        self.control_bus = ControlBus()

    def read(self, mem: Memory, address: Address) -> Data:
        self.address_bus.write(address)
        self.control_bus.write("read")
        return mem.read(self.address_bus.read())


def test() -> None:
    cpu = Processor()
    mem = Memory()

    cpu.read(mem, 0x0001)
    cpu.write(mem, 0x0001, 0x0000)

if __name__ == '__main__':
    test()