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+checksum = "6865c6b66f13d6257bef1cd40cbfe8ef2f150fb8ebbdb1e8e873455931377661"
+dependencies = [
+ "nix",
+ "wayland-client",
+ "xcursor",
+]
+
+[[package]]
+name = "wayland-protocols"
+version = "0.29.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b950621f9354b322ee817a23474e479b34be96c2e909c14f7bc0100e9a970bc6"
+dependencies = [
+ "bitflags",
+ "wayland-client",
+ "wayland-commons",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-scanner"
+version = "0.29.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f4303d8fa22ab852f789e75a967f0a2cdc430a607751c0499bada3e451cbd53"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "xml-rs",
+]
+
+[[package]]
+name = "wayland-sys"
+version = "0.29.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be12ce1a3c39ec7dba25594b97b42cb3195d54953ddb9d3d95a7c3902bc6e9d4"
+dependencies = [
+ "dlib",
+ "lazy_static",
+ "pkg-config",
+]
+
+[[package]]
+name = "web-sys"
+version = "0.3.61"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e33b99f4b23ba3eec1a53ac264e35a755f00e966e0065077d6027c0f575b0b97"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -332,3 +900,29 @@ name = "windows_x86_64_msvc"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"
+
+[[package]]
+name = "x11-dl"
+version = "2.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38735924fedd5314a6e548792904ed8c6de6636285cb9fec04d5b1db85c1516f"
+dependencies = [
+ "libc",
+ "once_cell",
+ "pkg-config",
+]
+
+[[package]]
+name = "xcursor"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "463705a63313cd4301184381c5e8042f0a7e9b4bb63653f216311d4ae74690b7"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "xml-rs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"

Cargo.toml

@@ -7,4 +7,5 @@ edition = "2021"
 
 [dependencies]
 clap = {version = "4.1.1", features = ["derive"]}
-spin_sleep = "1.1.1"
+spin_sleep = "1.1.1"
+minifb = "0.23"

src/main.rs

@@ -3,6 +3,7 @@
 mod processor;
 
 use clap::{ArgGroup, Parser};
+use minifb::{Window, WindowOptions};
 use processor::CPU;
 use std::{
     fs,
@@ -246,6 +247,9 @@ static mut PAUSE_QUEUED: bool = false;
 // static mut VERBOSE: bool = false;
 static VERBOSE: RwLock<bool> = RwLock::new(false);
 
+const WIDTH: usize = 160;
+const HEIGHT: usize = 144;
+
 fn main() {
     let args = Args::parse();
     {
@@ -253,6 +257,20 @@ fn main() {
         *v = args.verbose;
     }
 
+    let buffer: Vec<u32> = vec![0; WIDTH * HEIGHT];
+
+    let mut window = Window::new(
+        "Test - ESC to exit",
+        WIDTH,
+        HEIGHT,
+        WindowOptions::default(),
+    )
+    .unwrap_or_else(|e| {
+        panic!("{}", e);
+    });
+
+    window.update_with_buffer(&buffer, WIDTH, HEIGHT).unwrap();
+
     let rom: ROM = fs::read(args.rom).expect("Could not load ROM");
     let bootrom: ROM = fs::read(args.bootrom).expect("Could not load BootROM");
     let mut reg = Registers::default();
@@ -267,6 +285,8 @@ fn main() {
         last_instruction_addr: 0x0,
         vblank_timer: 0.,
         vblank_remaining: 0,
+        window,
+        buffer,
     };
     cpu_ram_init(&mut cpu);
     let mut cycle_num = 0;

src/processor/mod.rs

@@ -1,5 +1,7 @@
 use std::{mem::transmute, time::Duration};
 
+use minifb::Window;
+
 use crate::{processor::instructions::instructions::set, verbose_println, Memory};
 
 mod instructions;
@@ -25,6 +27,8 @@ pub struct CPU {
     pub last_instruction_addr: u16,
     pub vblank_timer: f64,
     pub vblank_remaining: u8,
+    pub window: Window,
+    pub buffer: Vec<u32>,
 }
 
 // Hz
@@ -72,6 +76,7 @@ impl CPU {
             if self.vblank_remaining == 0 {
                 self.memory
                     .set(0xFF0F, clear_bit(self.memory.get(0xFF0F), 0));
+                self.draw();
             }
         }
 
@@ -97,6 +102,8 @@ impl CPU {
         spin_sleep::sleep(Duration::from_secs_f64(secs / SPEEDUP));
     }
 
+    fn draw(&mut self) {}
+
     fn next_opcode(&mut self) -> u8 {
         let opcode = self.memory.get(self.reg.pc);
         self.reg.pc = self.reg.pc.wrapping_add(0x1);