commit 666bb56e6819a5f6eb7ec2bbe620f564f4a8807b · baileytownsend.dev/DMG-Playground

.gitignore

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       /target

     

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       /LegallyObtainedRom.gb

     

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       .idea/

Cargo.lock

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       # This file is automatically @generated by Cargo.

     

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       # It is not intended for manual editing.

     

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       version = 4

     

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       [[package]]

     

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       name = "GameBoyPlayground"

     

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       version = "0.1.0"

Cargo.toml

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       [package]

     

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       name = "GameBoyPlayground"

     

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       version = "0.1.0"

     

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       edition = "2024"

     

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       [dependencies]

README.md

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       # GameBoyPlayground

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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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       }