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[cpu] Instruction parsing

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Atreya Bain
2024-03-02 15:55:27 +05:30
parent a47553bfa7
commit 6aa8a24b75
3 changed files with 57 additions and 5 deletions
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12
src/device/device.rs
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@@ -47,13 +47,20 @@ impl Device{
];
const FONT_DEFAULT_MEM_LOCATION_START:usize = 0x50;
const FONT_DEFAULT_MEM_LOCATION_END:usize = 0x9F;
const ROM_START:usize = 0x200;
pub fn cycle(&mut self){
}
pub fn set_default_font(&mut self){
log::info!("Loaded default font from memory");
self.memory[Self::FONT_DEFAULT_MEM_LOCATION_START..=Self::FONT_DEFAULT_MEM_LOCATION_END].copy_from_slice(&Self::DEFAULT_FONT);
}
/// load a rom from bytes
pub fn load_rom(&mut self,rom: &[u8]){
log::info!("Loaded ROM from memory");
self.memory[Self::ROM_START..].copy_from_slice(rom);
}
}
impl Drop for Device{
@@ -64,17 +71,18 @@ impl Drop for Device{
pub struct RegisterFile {
pub v: [u8; 0x10],
// program counter - only u12 technically.
/// program counter - only u12 technically.
pub pc: u16,
/// stack pointer
pub i: u16,
}
impl RegisterFile {
pub const DEFAULT_PC_VALUE:u16 = Device::ROM_START as u16;
pub fn new() -> RegisterFile {
RegisterFile {
v: [0; 0x10],
pc: 0x200,
pc: Self::DEFAULT_PC_VALUE,
i: 0,
}
}