blob: d5fc6445c2cb4095d4001fdafb348d1dccba5a89 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
# 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
```bash
cargo run -- --f <examples/filename.asc>
```
## Todo
- [x] Assembler
- [x] Lexer/Tokenizer
- [x] Add label support (supporting JMP/JZ/JNZ)
- [ ] Add instructions
- [x] CMP
- [ ] CALL
- [ ] RET
- [ ] Error handling
- [ ] Build Debugger
|
