feat: better display of information

examples/sdl/src/main.rs

@@ -87,9 +87,10 @@ fn main() {
     //game_boy.load_rom_file("../../res/roms.prop/tetris.gb");
     //game_boy.load_rom_file("../../res/roms.prop/dr_mario.gb");
     //game_boy.load_rom_file("../../res/roms.prop/alleyway.gb");
+    game_boy.load_rom_file("../../res/roms.prop/super_mario.gb");
 
     //game_boy.load_rom_file("../../res/roms/firstwhite.gb");
-    game_boy.load_rom_file("../../res/roms/opus5.gb");
+    //game_boy.load_rom_file("../../res/roms/opus5.gb");
 
     //game_boy.load_rom_file("../../res/roms/paradius/cpu/01-special.gb"); // PASSED
     //game_boy.load_rom_file("../../res/roms/paradius/cpu/02-interrupts.gb"); // PASSED

src/gb.rs

@@ -4,6 +4,7 @@ use crate::{
     mmu::Mmu,
     pad::{Pad, PadKey},
     ppu::{Ppu, Tile, FRAME_BUFFER_SIZE},
+    rom::Rom,
     timer::Timer,
     util::read_file,
 };
@@ -69,6 +70,8 @@ impl GameBoy {
     }
 
     pub fn load_rom(&mut self, data: &[u8]) {
+        let rom = Rom::from_data(data);
+        println!("{}", rom);
         self.cpu.mmu().write_rom(0x0000, data);
     }
 

src/ppu.rs

@@ -113,7 +113,7 @@ impl Display for ObjectData {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         write!(
             f,
-            "Index => {} X => {} Y => {} Tile => {}",
+            "Index => {}\nX => {}\nY => {}\nTile => {}",
             self.index, self.x, self.y, self.tile
         )
     }

src/rom.rs

+use core::fmt;
+use std::fmt::{Display, Formatter};
+
 pub struct Rom {
     data: Vec<u8>,
 }
-
 pub enum RomType {
     RomOnly = 0x00,
     Mbc1 = 0x01,
@@ -12,12 +14,58 @@ pub enum RomType {
     Unknown = 0xff,
 }
 
+pub enum RomSize {
+    Size32K = 32,
+    Size64K = 64,
+    Size128K = 128,
+    SizeUnknown = 0,
+}
+
 impl Rom {
-    pub fn title() -> &'static str {
-        "asdas"
+    pub fn from_data(data: &[u8]) -> Self {
+        Self {
+            data: data.to_vec(),
+        }
     }
 
-    pub fn rom_type() -> RomType {
-        RomType::RomOnly
+    pub fn data(&self) -> &Vec<u8> {
+        &self.data
+    }
+
+    pub fn title(&self) -> &str {
+        std::str::from_utf8(&self.data[0x0134..0x0143]).unwrap()
+    }
+
+    pub fn rom_type(&self) -> RomType {
+        match self.data[0x0147] {
+            0x00 => RomType::RomOnly,
+            0x01 => RomType::Mbc1,
+            0x02 => RomType::Mbc1Ram,
+            0x03 => RomType::Mbc1RamBattery,
+            0x05 => RomType::Mbc2,
+            0x06 => RomType::Mbc2Battery,
+            _ => RomType::Unknown,
+        }
+    }
+
+    pub fn size(&self) -> RomSize {
+        match self.data[0x0148] {
+            0x00 => RomSize::Size32K,
+            0x01 => RomSize::Size64K,
+            0x02 => RomSize::Size128K,
+            _ => RomSize::SizeUnknown,
+        }
+    }
+}
+
+impl Display for Rom {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "Name => {}\nType => {}\nSize => {}",
+            self.title(),
+            self.rom_type() as u8,
+            self.size() as u32
+        )
     }
 }