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Tile fetch refactor and window pixel get

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This commit is contained in:
Franco Colmenarez
2021-10-31 17:03:59 -05:00
parent b0c07a5264
commit b5bb582c54
4 changed files with 119 additions and 48 deletions
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src/bus.rs
+6 -2
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@@ -5,7 +5,7 @@ use crate::utils::{
join_bytes
};
use crate::rom::ROM;
use crate::ppu::{PPU, LCDStatus, LCDStatusModeFlag, LCD_CONTROL_ADDRESS, LCD_Y_ADDRESS};
use crate::ppu::{PPU, LCDStatus, LCDStatusModeFlag, LCD_STATUS_ADDRESS, LCD_CONTROL_ADDRESS, LCD_Y_ADDRESS};
use crate::cpu::{Interrupt};
use crate::timer::{TIMER_DIVIDER_REGISTER_ADDRESS};
@@ -50,7 +50,7 @@ pub struct Bus {
impl Bus {
pub fn new() -> Self {
let game_rom = match ROM::load_file("ignore/mario-land.gb".to_string()) {
let game_rom = match ROM::load_file("ignore/dr-mario.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs_individual/01-special.gb".to_string()) {
// let game_rom = match ROM::load_file("roms/cpu_instrs_individual/02-interrupts.gb".to_string()) {
@@ -105,6 +105,10 @@ impl Bus {
self.data[(WORK_RAM_1.begin() + (address - ECHO_RAM.begin())) as usize] = data; // Copy to the working RAM
} else if address == TIMER_DIVIDER_REGISTER_ADDRESS {
self.data[address as usize] = 0x00;
} else if address == LCD_STATUS_ADDRESS {
// Prevent user from modifying LCD Status mode
let byte = self.data[address as usize];
self.data[address as usize] = (data & 0b1111_1100) | (byte & 0b0000_0011);
} else if address == LCD_CONTROL_ADDRESS && get_bit(data, BitIndex::I7) {
self.data[address as usize] = data;
self.data[LCD_Y_ADDRESS as usize] = 0x00;