57 lines
666 B
Rust
57 lines
666 B
Rust
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use std::cell::RefCell;
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use std::rc::{Rc, Weak};
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use crate::bus::Bus;
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pub struct CPU
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{
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acc: u8,
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x: u8,
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y: u8,
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p: u8,
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sp: u8,
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pc: u16,
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bus: Weak<RefCell<Bus>>
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}
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impl CPU
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{
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pub fn new(bus: &Rc<RefCell<Bus>>) -> CPU
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{
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CPU {
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acc: 0,
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x: 0,
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y: 0,
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p: 0,
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sp: 0,
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pc: 0,
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bus: Rc::downgrade(bus)
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}
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}
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pub fn powerup(&mut self)
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{
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self.p = 0x34;
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self.acc = 0;
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self.x = 0;
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self.y = 0;
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self.sp = 0xFD;
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}
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pub fn execute(&mut self)
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{
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let bus = self.bus.upgrade().unwrap();
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let opcode: u8 = bus.borrow().read_cpu(self.pc);
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self.pc += 1;
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match (opcode)
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{
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_ => panic!("Unimplemented opcode {}", opcode)
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}
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}
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}
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