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implement HALT trap routine

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This commit is contained in:
dogeystamp 2024-01-06 13:50:36 -05:00
parent 6fe7dffb4d
commit 928afa6de8
Signed by: dogeystamp
GPG Key ID: 7225FE3592EFFA38
2 changed files with 6 additions and 4 deletions
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2
src/vm/instruction.rs
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@ -118,7 +118,7 @@ fn op_trap(vm: &mut VM, instr: u16) {
0x22 => todo!("PUTS"), 0x22 => todo!("PUTS"),
0x23 => todo!("IN"), 0x23 => todo!("IN"),
0x24 => todo!("PUTSP"), 0x24 => todo!("PUTSP"),
0x25 => todo!("HALT"), 0x25 => vm.running = false,
_ => unimplemented!(), _ => unimplemented!(),
} }
} }

8
src/vm/mod.rs
View File

@ -138,6 +138,7 @@ impl Memory {
pub struct VM { pub struct VM {
mem: Memory, mem: Memory,
registers: Registers, registers: Registers,
running: bool,
} }
impl VM { impl VM {
@ -145,6 +146,7 @@ impl VM {
VM { VM {
mem: Memory::new(), mem: Memory::new(),
registers: Registers::new(), registers: Registers::new(),
running: false,
} }
} }
@ -187,9 +189,9 @@ impl VM {
} }
pub fn execute(&mut self) { pub fn execute(&mut self) {
let mut running: bool = true; self.running = true;
while running { while self.running {
let instr = self.mem.get_mem(self.registers.pc); let instr = self.mem.get_mem(self.registers.pc);
// NOTE // NOTE
@ -197,7 +199,7 @@ impl VM {
// disallow reading past memory bounds // disallow reading past memory bounds
if self.registers.pc as usize == MEM_SIZE - 1 { if self.registers.pc as usize == MEM_SIZE - 1 {
running = false self.running = false
} else { } else {
self.registers.pc += 1; self.registers.pc += 1;
} }