This is a simple implementation of a 2-register processor emulator with a 255 bytes RAM. Note that this is a WIP. Also, this is heavily based on the 4001 processor by Richard Buckland at UNSW.
The CPU consists of:
- One counter.
- Two 1-byte registers.
- One underflow flag.
- One overflow flag.
- One "signed" flag (for negative numbers).
This is a list of available operations.
| Operation Code | Description |
|---|---|
LD0 <addr> |
Load the value in the given memory address into register 0. |
LD1 <addr> |
Load the value in the given memory address into register 1. |
| ADD | Add both registers and store the result in register 0. |
STR <addr> |
Store the value in register 0 in the given memory address. |
PRT <addr> |
Print the value in the given memory address. |
JMP <addr> |
Jump to the given memory address. |
JPE <addr> |
Jump to the given memory address if both registers are equal. |
| CL0 | Set the register 0 to zero. |
| CL1 | Set the register 1 to zero. |
| CP0 | Copy the value in register 0 into register 1. |
| CP1 | Copy the value in register 1 into register 0. |
| BEL | Make the computer "beep". |
| HAL | Stop execution. |
mkdir -p build
cd build
cmake ..
./bin/emu `<path_to_program>`
You can write your own programs or check out the examples in the examples folder.