sean3z

pub fn emulate_cycle(&mut self) {
    self.fetch_opcode();
    self.execute_opcode();

    // okay, PCs are much faster these days
    // threw this cheeky delay in to slow things down
    thread::sleep(time::Duration::from_micros(500));
}

fn fetch_opcode(&mut self) {

sean3z

impl Cpu {
    pub fn new() -> Cpu {
        let mut memory = [0; 4096];

        // load fonts into memory
        for i in 0..80 {
            memory[i] = FONTS[i];
        };

        Cpu {

sean3z

 pub fn load_game(&mut self, game: &str) {
    // attempt to load supplied ROM
    let mut reader = File::open(game).expect("Unable to locate ROM");
    let mut buffer = Vec::new();
    reader.read_to_end(&mut buffer).expect("Unable to read ROM data");

    // load ROM into memory (AFTER system reserved memory)
    for i in 0..buffer.len() {
        self.memory[i + self.program] = buffer[i];
    };

sean3z

use rand;
use std::fs::File;

use display::Display;
use keypad::Keypad;

pub struct Cpu {
    program: usize, // program counter starts at 512 bytes
    opcode: u16, // current opcode
    stack: [u16; 16], // stack storage

sean3z

use cpu::Cpu;

mod cpu;
mod keypad;
mod display;

fn main() {
    let mut cpu = Cpu::new();

    cpu.load_game("/home/sean/www/chip8-emulator-rust/roms/pong");

sean3z

alias apgar {  
  var %lookup = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
  var %out, %i = 1
  while (%i <= 8) {
    var %left, %right = 0
    if (%i <= $len($1-)) { %left = $asc($mid($1-, %i ,1)) }
    if ($calc($len($1-) - %i + 1) < $len($1-)) { %right = $asc($mid($1-, $calc($len($1-) - %i + 2), 1)) }
    var %x = $iif(%left & 1, $and($calc(%left * (2 ^ $and(%left, 1))), %right), $xor(%left, %right))
    ;# echo -a left: %left - righT: %right - x: %x
    %out = %out $+ $mid(%lookup, $calc($and(%x, 63) + 1), 1)

sean3z

std::string apgar(std::string input) {  
  std::string lookup = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  std::string out = "";
  int i = 0;
  while (i < 8) {
    unsigned char left = input[i];
    unsigned char right = input[input.length() - i];

    unsigned char x = left & 1 ? ((left << 1) ^ (left & 1)) & right : left ^ right;

sean3z

function apgar(s) {  
    if (s.length != 8) return false;
    var s = s.split(''), o = [];
    var u = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./';
    for(var i = 0; i <= 7; i++) {
        var a = s[(8 - i)], r = ((i == 0) ? 0 : a.charCodeAt(0));
        var j = s[i].charCodeAt(0), x = ((j & 1) ? (j << 1) & r : j ^ r);
        var k = (x & 0x3f), f = u.substring(k, (k + 1));
        o.push(f);
    }

sean3z

<?php  
echo apgar('password'); //result WaIMMsbf

function apgar($a) {  
  if (strlen($a) == 8) {
    $u = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    for ($i = 0; $i <= 7; $i++) {
      $r = ($i == 0) ? 0 : ord($a[8 - $i]);
      $x = (ord($a[$i]) & 1) ? (ord($a[$i]) << 1) & $r : ord($a[$i]) ^ $r;
      $o[] = substr($u, ($x & 0x3f), 1);

sean3z

<?php  
function handle_pagination($total, $page, $shown, $url) {  
  $pages = ceil( $total / $shown ); 
  $range_start = ( ($page >= 5) ? ($page - 3) : 1 );
  $range_end = ( (($page + 5) > $pages ) ? $pages : ($page + 5) );

  if ( $page >= 1 ) {
    $r[] = '<span><a href="'. $url .'">&laquo; first</a></span>';
    $r[] = '<span><a href="'. $url . ( $page - 1 ) .'">&lsaquo; previous</a></span>';
    $r[] = ( ($range_start > 1) ? ' ... ' : '' );