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init cpu ram properly + other minor changes

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This commit is contained in:
Alex Janka 2023-01-20 14:58:43 +11:00
parent 4fcde0fd82
commit ac023fdc31
1 changed files with 26 additions and 1 deletions
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27
src/main.rs
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@ -83,9 +83,10 @@ impl Memory {
// todo - switchable rom banks
if self.bootrom_enabled && (address as usize) < self.bootrom.len() {
return self.bootrom[address as usize];
}
} else {
return self.rom[address as usize];
}
}
0x8000..0xA000 => {
return self.vram[(address - 0x8000) as usize];
}
@ -169,6 +170,7 @@ impl Memory {
}
}
#[derive(Clone, Copy)]
pub struct State {
af: Register,
bc: Register,
@ -208,6 +210,7 @@ fn main() {
last_instruction: 0x0,
last_instruction_addr: 0x0,
};
cpu_ram_init(&mut cpu);
#[allow(unused_variables)]
let mut cycle_num = 0;
match args.step_by {
@ -253,3 +256,25 @@ fn print_cycles(cycles: &i32) {
);
stdout().flush().unwrap();
}
fn cpu_ram_init(cpu: &mut CPU) {
cpu.memory.set(0xFF10, 0x80);
cpu.memory.set(0xFF11, 0xBF);
cpu.memory.set(0xFF12, 0xF3);
cpu.memory.set(0xFF14, 0xBF);
cpu.memory.set(0xFF16, 0x3F);
cpu.memory.set(0xFF19, 0xBF);
cpu.memory.set(0xFF1A, 0x7F);
cpu.memory.set(0xFF1B, 0xFF);
cpu.memory.set(0xFF1C, 0x9F);
cpu.memory.set(0xFF1E, 0xBF);
cpu.memory.set(0xFF20, 0xFF);
cpu.memory.set(0xFF23, 0xBF);
cpu.memory.set(0xFF24, 0x77);
cpu.memory.set(0xFF25, 0xF3);
cpu.memory.set(0xFF26, 0xF1);
cpu.memory.set(0xFF40, 0x91);
cpu.memory.set(0xFF47, 0xFC);
cpu.memory.set(0xFF48, 0xFF);
cpu.memory.set(0xFF49, 0xFF);
}