1.4 KiB
1.4 KiB
8-Bit CPU Emulator
CPU Architecture
- Word Size
- Data Width: 8 bits
- Address width: 16 bits
- Address space: 64 KB (0x0000-0xFFFF)
Supported Instructions
| Instruction | Syntax |
|---|---|
| MOV | mov reg, imm OR mov reg, reg |
| ADD | add reg, imm OR add r1, r2 |
| SUB | sub reg, imm OR add r1, r2 |
| JMP | jmp addr |
| JZ | jz addr |
| JNZ | jnz addr |
| CMP | cmp reg, imm OR cmp reg, reg |
| HLT (Halt) | hlt |
Registers
| Register | Size | Description |
|---|---|---|
| A | 8-bit | General |
| B | 8-bit | General |
| C | 8-bit | General |
| D | 8-bit | General |
| PC | 16-bit | Program Counter |
| SP | 16-bit | Stack pointer (unused for now) |
Flags
| Flag | Description |
|---|---|
| Z | Zero Flag |
| C | Carry/Borrow |
Usage
cargo run -- --f <examples/filename.asc>
Todo
- Assembler
- Lexer/Tokenizer
- Add label support (supporting JMP/JZ/JNZ)
- Add instructions
- CMP
- CALL
- RET
- Error handling
- Build Debugger