processor runs completely

src/cpu.rs

@@ -2,6 +2,7 @@ use std::fmt;
 use std::fs::File;
 use std::path::Path;
 use std::io::prelude::*;
+use std::io;
 use super::*;
 
 pub struct Cpu {
@@ -10,6 +11,7 @@ pub struct Cpu {
     reg: Vec<u16>,
     pc: u16,
     alu: Alu,
+    inline: String,
 }
 
 impl fmt::Debug for Cpu {
@@ -39,6 +41,7 @@ impl Cpu {
             reg: vec![0; 8],
             pc: 0,
             alu: Alu::new(),
+            inline: String::new(),
         }
     }
 
@@ -280,7 +283,11 @@ impl Cpu {
                         if DEBUG {
                             println!("{}: in {}", self.pc, self.mem[(self.pc + 1) as usize]);
                         }
-                        running = false;
+                        self.inc_pc();
+                        let reg = self.readmem(self.pc).unwrap();
+                        let val = self.input() as u16;
+                        self.write(reg, val)?;
+                        self.inc_pc();
                     },
                     21 => {                     //noop: no operation
                         if DEBUG {
@@ -367,4 +374,12 @@ impl Cpu {
         self.pc += 1;
         self.pc %= 32768;
     }
+
+    fn input(&mut self) -> u8 {
+        if self.inline.is_empty() {
+            let stdin = io::stdin();
+            stdin.read_line(&mut self.inline);
+        }
+        self.inline.remove(0) as u8
+    }
 }

src/main.rs

@@ -4,7 +4,7 @@ mod alu;
 use cpu::Cpu;
 use alu::Alu;
 
-pub const DEBUG: bool = true;
+pub const DEBUG: bool = false;
 
 fn main() {
     let mut cpu = Cpu::new();