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transistor 2021-10-14 21:53:42 -07:00
parent 43b1abfa19
commit 72457aca5c
1 changed files with 11 additions and 4 deletions
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15
src/cpus/m68k/execute.rs
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@ -17,6 +17,8 @@ use super::decode::{
sign_extend_to_long
};
const DEV_NAME: &'static str = "m68k-cpu";
use super::state::{M68k, Status, Flags, Exceptions, InterruptPriority};
impl Steppable for M68k {
@ -28,6 +30,10 @@ impl Steppable for M68k {
fn on_error(&mut self, system: &System) {
self.dump_state(system);
}
fn on_debug(&mut self) {
self.enable_debugging();
}
}
impl Interruptable for M68k {
@ -64,9 +70,9 @@ impl M68k {
self.execute_current(system)?;
self.timer.cycle.end(timer);
if (self.timer.cycle.events % 500) == 0 {
println!("{}", self.timer);
}
//if (self.timer.cycle.events % 500) == 0 {
// println!("{}", self.timer);
//}
self.check_pending_interrupts(system)?;
@ -90,6 +96,7 @@ impl M68k {
let priority_mask = ((self.state.sr & Flags::IntMask as u16) >> 8) as u8;
if (pending_ipl >= priority_mask || pending_ipl == 7) && pending_ipl >= current_ipl {
debug!("{} interrupt: {} {}", DEV_NAME, pending_ipl, priority_mask);
self.state.current_ipl = self.state.pending_ipl;
self.exception(system, self.state.ipl_ack_num)?;
return Ok(());
@ -104,7 +111,7 @@ impl M68k {
}
pub fn exception(&mut self, system: &System, number: u8) -> Result<(), Error> {
println!("raising exception {}", number);
debug!("{}: raising exception {}", DEV_NAME, number);
let offset = (number as u16) << 2;
self.push_word(system, offset)?;
self.push_long(system, self.state.pc)?;