Added very bad screen & readme

This commit is contained in:
august kline 2024-02-04 22:55:03 -05:00
parent 3f40dc1ae3
commit cf0f87649f
4 changed files with 845 additions and 5 deletions

798
Cargo.lock generated
View File

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View File

@ -6,3 +6,4 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
minifb = "0.25.0"

11
README.md Normal file
View File

@ -0,0 +1,11 @@
# george-emu
a ramshackle emulator for george 😌
plenty of inspiration & guidance taken from [emulator_6502](https://docs.rs/emulator_6502/latest/emulator_6502/) (don't use `george-emu` in a serious project! `emulator_6502` is the crate you're looking for)
## structure
see [the george wiki](https://git.augustkline.com/august/george/wiki) for how george works, why she exists, who she is, etc.
the george emulator contains 3 main structs: `Cpu`, `Mem`, and `MemMappedDevice`. `Cpu` represents a 65c02 processor, with functions for interacting with memory and executing instructions. `Mem` is a collection of `MemMappedDevice`'s, which each hold the data for some address space. `Mem` can add `MemMappedDevice`'s, and read from and write to them. A `MemMappedDevice` can have multiple banks at the same address space, and can translate 'global' addresses to 'local' ones (e.g. 0xFFFF in the system's [memory map](https://git.augustkline.com/august/george-hardware/src/branch/main/memory.md) corresponds to 0x1FFF in the ROM).

View File

@ -1,9 +1,12 @@
#![allow(dead_code)]
use core::panic;
use minifb::{Key, Window, WindowOptions};
use std::{
collections::HashMap,
fmt::write,
fs::{self, File},
io::Read,
mem,
path::PathBuf,
thread::sleep,
time::Duration,
@ -3442,7 +3445,7 @@ fn main() {
Ok(()) => {}
};
let binary = match fs::File::open(PathBuf::from(
"/Users/kline/projects/winter/georgeemu/src/george",
"/Users/kline/projects/winter/george-emu/src/george",
)) {
Ok(file) => file,
Err(error) => panic!("Couldn't open binary file! {:?}", error),
@ -3451,10 +3454,37 @@ fn main() {
Err(error) => println!("{:?}", error),
Ok(_) => {}
};
let mut cpu = Cpu::new(memory);
match cpu.reset() {
Err(error) => println!("{error:?}"),
Ok(()) => {}
for i in 0x6000..0xBF00 {
if i > 0 && i < 0x9000 {
memory.write(i, 0x01).unwrap();
} else {
memory.write(i, 0x22).unwrap();
}
}
let bitmask = [128, 64, 32, 16, 8, 4, 2, 1];
// let bitmask = [1, 2, 4, 8, 16, 32, 64, 128];
let mut buffer: Vec<u32> = vec![0; 512 * 380];
let mut window = match Window::new("george", 512, 380, WindowOptions::default()) {
Ok(win) => win,
Err(error) => {
println!("unable to create window {}", error);
return;
}
};
while window.is_open() && !window.is_key_down(Key::Escape) {
for addr in 0x6000..0xBF00 {
let byte = memory.read(addr).unwrap();
for i in 0..8 {
match byte & bitmask[i] == 0 {
true => continue,
false => buffer[(addr - 0x6000) as usize * 8 + i] = 0xFFFFFF,
}
}
}
window.update_with_buffer(&buffer, 512, 380).unwrap();
}
let mut cpu = Cpu::new(memory);
cpu.reset().unwrap();
window.limit_update_rate(Some(std::time::Duration::from_micros(16600)));
cpu.execute();
}