5 releases
| 0.0.5 | Jan 6, 2022 |
|---|---|
| 0.0.4 | Jan 4, 2022 |
| 0.0.3 | Dec 31, 2021 |
| 0.0.2 | Dec 31, 2021 |
| 0.0.1 | Dec 31, 2021 |
#4 in #64
60KB
1K
SLoC
M64
⚠️ This crate is in pre-alpha and should not be used for any purpose at this time.
A MAXCOM 64 personal computer emulator.
Usage
M64 assembly interpreter
cargo install m64
m64 run my_program.m64
Example M64 assembly programs are available in ./samples.
Specs
Instruction set
| opcode | args (undocumented) |
|---|---|
| MOV | |
| LOG | |
| PSH | |
| POP | |
| ADD | |
| SUB | |
| MUL | |
| DIV | |
| MOD | |
| CMP | |
| RUN | |
| RET | |
| YLD | |
| JMP | |
| JLT | |
| JGT | |
| JEQ | |
| JNE | |
| NOP | |
| HLT |
Memory Map (NYI)
| start | end | usage | byte represents |
|---|---|---|---|
| 0x0000 | 0x03E7 | screen contents | index of character in cell |
| 0x03E8 | 0x07CF | screen colors | 0xFB where F is foreground color and B is background color |
| 0x07D0 | 0x0E9F | character map | 8 bytes per character, each bit is a pixel, bytes are rows |
| 0x0EA0 | 0x0F9F | program stack | any data |
Standard Library (NYI)
The M64 comes with a standard library of functions that can be called by pushing
the arguments to the stack and executing RUN {function code}.
| function name | function code | args... | returns |
|---|---|---|---|
| 0x00 | null-terminated string | ||
| getch | 0x01 | block | ASCII code |
| time | 0x02 | timestamp |
Dependencies
~2.6–4MB
~76K SLoC