Playing around with reading gameboy roms, and maybe emulation
Start
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Cargo.lock
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Cargo.lock
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Cargo.toml
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Cargo.toml
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README.md
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README.md
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# GameBoyPlayground
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src/main.rs
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src/main.rs
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use std::fs::File;
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use std::io::{Read, Seek, SeekFrom, Write};
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const ROM_NAME: &str = "LegallyObtainedRom.gb";
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pub enum Error {
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CartridgeReadError,
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}
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struct CartridgeHeader {
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//Should be 80 bytes (0x014F(335) - 0x0100(256)) + 1 to include the last address
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buffer: [u8; 80],
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}
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impl CartridgeHeader {
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fn new(rom_location: &str ) -> Result<Self, Error> {
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let mut rom_file = File::open(rom_location)?;
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rom_file.seek(SeekFrom::Start(CartridgeHeaderAddress::CartridgeHeaderStart as u64))?;
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let mut header_buffer: [u8; 80] = [0; 80];
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rom_file.read_exact(&mut header_buffer)?;
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Ok(Self {
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buffer: header_buffer
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})
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}
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}
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pub enum CartridgeHeaderAddress {
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CartridgeHeaderStart = 0x0100,
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CartridgeHeaderEnd = 0x014F
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}
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fn main() -> std::io::Result<()> {
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let mut rom_file = File::open(ROM_NAME)?;
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rom_file.seek(SeekFrom::Start(CartridgeHeaderAddress::CartridgeHeaderStart as u64))?;
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let mut header_buffer: [u8; 80] = [0; 80];
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rom_file.read_exact(&mut header_buffer)?;
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let mut byte_index = 0x0100;
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for byte in header_buffer.iter() {
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// println!("{}", *byte as char);
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print!("{:02x} ", byte_index);
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byte_index += 1;
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}
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Ok(())
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}