terminal mode! i like this better, also functional cli now

Cargo.toml

@@ -8,18 +8,8 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.81"
 bdf = "0.6.0"
-clap = { version = "4.5.4", features = ["derive"] }
-criterion = "0.4"
 crossterm = "0.27.0"
-minifb = "0.25.0"
+# minifb = "0.25.0"
-ratatui = "0.26.3"
+# ratatui = "0.26.3"
 serde = { version = "1.0.197", features = ["serde_derive", "derive"] }
 toml = "0.8.12"
-
-[dev-dependencies]
-criterion = {version = "0.4", features = ["html_reports"]}
-
-[[bench]]
-name = "benchmark"
-path = "src/benches/benchmark.rs"
-harness = false

run.sh

@@ -1,5 +1,12 @@
 #!/usr/bin/env bash
 
-vasm6502_oldstyle ./src/roms/george.asm -dotdir -wdc02 -ldots -Fbin -o ./src/roms/george.rom;
+if [ $# -eq 0 ]; then
-cargo run;
+ echo "Provide the name of the rom/asm file to run"
+ exit 1
+fi
+
+set -e
+
+vasm6502_oldstyle ./src/roms/$1.asm -dotdir -wdc02 -ldots -Fbin -o ./src/roms/$1.rom;
+cargo run rom "./src/roms/$1.rom";
 # hexdump -C ./cpu_dump.bin;

src/cpu.rs

@@ -2,8 +2,8 @@ use crate::instructions::{get_instruction, Instruction};
 use crate::memory::{MemHandle, MemoryReader, MemoryWriter};
 use crate::types::{Byte, Word};
 use std::fmt::Display;
-use std::sync::mpsc::{Receiver, Sender};
+use std::sync::mpsc::{channel, Receiver, Sender};
-use std::thread::sleep;
+use std::thread::{sleep, LocalKey};
 use std::time::Duration;
 
 use anyhow::Result;
@@ -124,6 +124,13 @@ impl Cpu {
             // state_tx,
         }
     }
+    pub fn new_with_control(memory: MemHandle) -> (Self, CpuController) {
+        let (tx, rx) = channel::<CpuControl>();
+        let controller = CpuController(tx);
+        let receiver = CpuReceiver(rx);
+        let cpu = Cpu::new(memory, receiver);
+        (cpu, controller)
+    }
     pub fn reset(&mut self) -> Result<()> {
         let reset_vector_pointer = self.read_word(0xFFFC)?;
         self.pc = reset_vector_pointer;
@@ -203,7 +210,11 @@ impl Cpu {
     }
 
     fn receive_control(&mut self) {
-        let control = self.receiver.0.recv().unwrap();
+        let control = match self.receiver.0.try_recv() {
+            Ok(control) => control,
+            Err(_error) => return, // most of the time we won't have any impending control
+                                   // messages, just return if that's the case
+        };
         match control {
             CpuControl::Nmi => self.nmi = true,
             CpuControl::Irq => self.irq = true,
@@ -226,13 +237,13 @@ impl Cpu {
     }
 
     pub fn cycle(&mut self) {
-        // self.receive_control();
+        self.receive_control();
         if self.stopped {
             return;
         }
         while self.pending_cycles != 0 {
             // roughly cycle-accurate timing
-            sleep(Duration::from_nanos(100));
+            sleep(Duration::from_nanos(500));
             self.pending_cycles -= 1;
         }
         if !self.get_flag(StatusFlag::IrqDisable) && self.irq {
@@ -272,7 +283,6 @@ impl Cpu {
             },
         }
         // self.cycle_count += 1;
-        sleep(Duration::from_nanos(100));
     }
     pub fn stop(&mut self) {
         self.stopped = true;

src/keyboard.rs

@@ -1,4 +1,5 @@
-use minifb::{InputCallback, Key};
+use crossterm::event::{KeyCode, KeyEvent, KeyEventKind, KeyModifiers};
+// use minifb::{InputCallback, Key};
 
 use crate::memory::{MemHandle, MemoryWriter};
 
@@ -10,71 +11,66 @@ impl Keyboard {
     pub fn new(memory: MemHandle) -> Self {
         Self { memory }
     }
-}
+    pub fn read_keys(&self, key: KeyEvent) {
-
-impl MemoryWriter for Keyboard {
-    fn write(&self, address: u16, data: u8) {
-        self.memory.write(address, data);
-    }
-}
-
-impl InputCallback for Keyboard {
-    fn add_char(&mut self, _uni_char: u32) {}
-    fn set_key_state(&mut self, key: Key, _state: bool) {
         let mut row0 = 0;
         let mut row1 = 0;
         let mut row2 = 0;
         let mut row3 = 0;
         let mut row4 = 0;
         let mut row5 = 0;
-
+        if key.kind == KeyEventKind::Press || key.kind == KeyEventKind::Repeat {
-        match key {
+            match key.modifiers {
-            Key::Escape => row0 ^= 0b1000_0000,
+                KeyModifiers::SHIFT => row2 ^= 0b1000_0000,
-            Key::W => row0 ^= 0b0100_0000,
+                KeyModifiers::CONTROL => row3 ^= 0b1000_0000,
-            Key::E => row0 ^= 0b0010_0000,
+                KeyModifiers::ALT => row4 ^= 0b1000_0000,
-            Key::R => row0 ^= 0b0001_0000,
+                KeyModifiers::META => row5 ^= 0b1000_0000,
-            Key::T => row0 ^= 0b0000_1000,
+                KeyModifiers::SUPER => row5 ^= 0b0010_0000,
-            Key::U => row0 ^= 0b0000_0100,
-            Key::O => row0 ^= 0b0000_0010,
-            Key::Backspace => row0 ^= 0b0000_0001,
-            Key::Tab => row1 ^= 0b1000_0000,
-            Key::Q => row1 ^= 0b0100_0000,
-            Key::S => row1 ^= 0b0010_0000,
-            Key::G => row1 ^= 0b0001_0000,
-            Key::Y => row1 ^= 0b0000_1000,
-            Key::I => row1 ^= 0b0000_0100,
-            Key::P => row1 ^= 0b0000_0010,
-            Key::Enter => row1 ^= 0b0000_0001,
-            Key::LeftShift | Key::RightShift => row2 ^= 0b1000_0000,
-            Key::D => row2 ^= 0b0100_0000,
-            Key::V => row2 ^= 0b0010_0000,
-            Key::H => row2 ^= 0b0001_0000,
-            Key::K => row2 ^= 0b0000_1000,
-            Key::Apostrophe => row2 ^= 0b0000_0100,
-            Key::Slash => row2 ^= 0b0000_0010,
-            Key::A => row2 ^= 0b0000_0001,
-            Key::LeftCtrl | Key::RightCtrl => row3 ^= 0b1000_0000,
-            Key::Z => row3 ^= 0b0100_0000,
-            Key::F => row3 ^= 0b0010_0000,
-            Key::B => row3 ^= 0b0001_0000,
-            Key::J => row3 ^= 0b0000_1000,
-            Key::L => row3 ^= 0b0000_0100,
-            Key::Key2 => row3 ^= 0b0000_0010,
-            Key::Key4 => row3 ^= 0b0000_0001,
-            Key::LeftAlt | Key::RightAlt => row4 ^= 0b1000_0000,
-            Key::X => row4 ^= 0b0100_0000,
-            Key::C => row4 ^= 0b0010_0000,
-            Key::N => row4 ^= 0b0001_0000,
-            Key::M => row4 ^= 0b0000_1000,
-            Key::Comma => row4 ^= 0b0000_0100,
-            Key::Key1 => row4 ^= 0b0000_0010,
-            Key::Key3 => row4 ^= 0b0000_0001,
-            Key::LeftSuper => row5 ^= 0b1000_0000,
-            Key::Space => row5 ^= 0b0100_0000,
-            Key::RightSuper => row5 ^= 0b0010_0000,
                 _ => {}
             };
 
+            match key.code {
+                KeyCode::Esc => row0 ^= 0b1000_0000,
+                KeyCode::Char('w') => row0 ^= 0b0100_0000,
+                KeyCode::Char('e') => row0 ^= 0b0010_0000,
+                KeyCode::Char('r') => row0 ^= 0b0001_0000,
+                KeyCode::Char('t') => row0 ^= 0b0000_1000,
+                KeyCode::Char('u') => row0 ^= 0b0000_0100,
+                KeyCode::Char('o') => row0 ^= 0b0000_0010,
+                KeyCode::Backspace => row0 ^= 0b0000_0001,
+                KeyCode::Tab => row1 ^= 0b1000_0000,
+                KeyCode::Char('q') => row1 ^= 0b0100_0000,
+                KeyCode::Char('s') => row1 ^= 0b0010_0000,
+                KeyCode::Char('g') => row1 ^= 0b0001_0000,
+                KeyCode::Char('y') => row1 ^= 0b0000_1000,
+                KeyCode::Char('i') => row1 ^= 0b0000_0100,
+                KeyCode::Char('p') => row1 ^= 0b0000_0010,
+                KeyCode::Enter => row1 ^= 0b0000_0001,
+                KeyCode::Char('d') => row2 ^= 0b0100_0000,
+                KeyCode::Char('v') => row2 ^= 0b0010_0000,
+                KeyCode::Char('h') => row2 ^= 0b0001_0000,
+                KeyCode::Char('k') => row2 ^= 0b0000_1000,
+                KeyCode::Char('\'') => row2 ^= 0b0000_0100,
+                KeyCode::Char('/') => row2 ^= 0b0000_0010,
+                KeyCode::Char('a') => row2 ^= 0b0000_0001,
+                KeyCode::Char('z') => row3 ^= 0b0100_0000,
+                KeyCode::Char('f') => row3 ^= 0b0010_0000,
+                KeyCode::Char('b') => row3 ^= 0b0001_0000,
+                KeyCode::Char('j') => row3 ^= 0b0000_1000,
+                KeyCode::Char('l') => row3 ^= 0b0000_0100,
+                KeyCode::Char('2') => row3 ^= 0b0000_0010,
+                KeyCode::Char('4') => row3 ^= 0b0000_0001,
+                KeyCode::Char('x') => row4 ^= 0b0100_0000,
+                KeyCode::Char('c') => row4 ^= 0b0010_0000,
+                KeyCode::Char('n') => row4 ^= 0b0001_0000,
+                KeyCode::Char('m') => row4 ^= 0b0000_1000,
+                KeyCode::Char(',') => row4 ^= 0b0000_0100,
+                KeyCode::Char('1') => row4 ^= 0b0000_0010,
+                KeyCode::Char('3') => row4 ^= 0b0000_0001,
+                KeyCode::Char(' ') => row5 ^= 0b0100_0000,
+                _ => {}
+            }
+        };
+
         self.memory.write(0x4400, row0);
         self.memory.write(0x4401, row1);
         self.memory.write(0x4402, row2);
@@ -83,3 +79,75 @@ impl InputCallback for Keyboard {
         self.memory.write(0x4405, row5);
     }
 }
+
+impl MemoryWriter for Keyboard {
+    fn write(&self, address: u16, data: u8) {
+        self.memory.write(address, data);
+    }
+}
+
+// impl InputCallback for Keyboard {
+//     fn add_char(&mut self, _uni_char: u32) {}
+//     fn set_key_state(&mut self, key: Key, _state: bool) {
+//         let mut row0 = 0;
+//         let mut row1 = 0;
+//         let mut row2 = 0;
+//         let mut row3 = 0;
+//         let mut row4 = 0;
+//         let mut row5 = 0;
+
+//         match key {
+//             Key::Escape => row0 ^= 0b1000_0000,
+//             Key::W => row0 ^= 0b0100_0000,
+//             Key::E => row0 ^= 0b0010_0000,
+//             Key::R => row0 ^= 0b0001_0000,
+//             Key::T => row0 ^= 0b0000_1000,
+//             Key::U => row0 ^= 0b0000_0100,
+//             Key::O => row0 ^= 0b0000_0010,
+//             Key::Backspace => row0 ^= 0b0000_0001,
+//             Key::Tab => row1 ^= 0b1000_0000,
+//             Key::Q => row1 ^= 0b0100_0000,
+//             Key::S => row1 ^= 0b0010_0000,
+//             Key::G => row1 ^= 0b0001_0000,
+//             Key::Y => row1 ^= 0b0000_1000,
+//             Key::I => row1 ^= 0b0000_0100,
+//             Key::P => row1 ^= 0b0000_0010,
+//             Key::Enter => row1 ^= 0b0000_0001,
+//             Key::LeftShift | Key::RightShift => row2 ^= 0b1000_0000,
+//             Key::D => row2 ^= 0b0100_0000,
+//             Key::V => row2 ^= 0b0010_0000,
+//             Key::H => row2 ^= 0b0001_0000,
+//             Key::K => row2 ^= 0b0000_1000,
+//             Key::Apostrophe => row2 ^= 0b0000_0100,
+//             Key::Slash => row2 ^= 0b0000_0010,
+//             Key::A => row2 ^= 0b0000_0001,
+//             Key::LeftCtrl | Key::RightCtrl => row3 ^= 0b1000_0000,
+//             Key::Z => row3 ^= 0b0100_0000,
+//             Key::F => row3 ^= 0b0010_0000,
+//             Key::B => row3 ^= 0b0001_0000,
+//             Key::J => row3 ^= 0b0000_1000,
+//             Key::L => row3 ^= 0b0000_0100,
+//             Key::Key2 => row3 ^= 0b0000_0010,
+//             Key::Key4 => row3 ^= 0b0000_0001,
+//             Key::LeftAlt | Key::RightAlt => row4 ^= 0b1000_0000,
+//             Key::X => row4 ^= 0b0100_0000,
+//             Key::C => row4 ^= 0b0010_0000,
+//             Key::N => row4 ^= 0b0001_0000,
+//             Key::M => row4 ^= 0b0000_1000,
+//             Key::Comma => row4 ^= 0b0000_0100,
+//             Key::Key1 => row4 ^= 0b0000_0010,
+//             Key::Key3 => row4 ^= 0b0000_0001,
+//             Key::LeftSuper => row5 ^= 0b1000_0000,
+//             Key::Space => row5 ^= 0b0100_0000,
+//             Key::RightSuper => row5 ^= 0b0010_0000,
+//             _ => {}
+//         };
+
+//         self.memory.write(0x4400, row0);
+//         self.memory.write(0x4401, row1);
+//         self.memory.write(0x4402, row2);
+//         self.memory.write(0x4403, row3);
+//         self.memory.write(0x4404, row4);
+//         self.memory.write(0x4405, row5);
+//     }
+// }

src/main.rs

@@ -5,7 +5,6 @@ mod error;
 mod instructions;
 mod keyboard;
 mod memory;
-mod tui;
 mod types;
 mod video;
 
@@ -14,41 +13,31 @@ use crate::keyboard::Keyboard;
 use crate::memory::Mem;
 use crate::video::{Screen, TerminalRenderer};
 
-use cpu::{CpuController, CpuReceiver};
-use crossterm::cursor::Hide;
 use crossterm::execute;
 use crossterm::terminal::{size, Clear, ClearType, SetSize};
 // use cpu::CpuController;
 use memory::MemHandle;
-// use clap::Parser;
 // use minifb::{Scale, ScaleMode, Window, WindowOptions};
 use serde::{Deserialize, Serialize};
 
+use std::env;
+use std::io::ErrorKind;
+use std::process::exit;
+use std::thread::{self, sleep};
+use std::time::Duration;
 use std::{
     fs::File,
     io::{stdout, Read, Result},
     path::PathBuf,
     str::FromStr,
-    sync::mpsc,
-    thread,
 };
 
 use crossterm::{
     cursor,
     event::{self, KeyCode, KeyEventKind},
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
-    // ExecutableCommand,
 };
 
-// use toml::Table;
-
-//#[derive(Parser)]
-//struct Cli {
-//    // Load a rom onto the system rom
-//    #[arg(short, required = true)]
-//    rom: Option<std::path::PathBuf>,
-//}
-
 #[derive(Serialize, Deserialize, Debug)]
 struct Config {
     char_rom: Option<String>,
@@ -56,21 +45,26 @@ struct Config {
 }
 
 fn main() -> Result<()> {
-    let mut stdout = stdout();
+    let args: Vec<String> = env::args().collect();
-    let (cols, rows) = size()?;
-    execute!(stdout, SetSize(64, 29), cursor::Hide, EnterAlternateScreen)?;
-    enable_raw_mode()?;
 
-    let config: Config = match File::open("./config.toml") {
+    let mut memory = Mem::new();
+    match args.len() {
+        0 => {
+            println!("george-emu must be run in the terminal, don't know what went wrong here!");
+            exit(1)
+        }
+        1 => {
+            let config: Config = match File::open("./george.toml") {
                 Ok(mut file) => {
                     let mut string = String::new();
                     file.read_to_string(&mut string).unwrap();
                     toml::from_str(string.as_str()).unwrap()
                 }
-        Err(_) => return Ok(()),
+                Err(_) => {
+                    println!("couldn't find a `george.toml` in the current directory!");
+                    exit(1);
+                }
             };
-
-    let mut memory = Mem::new();
             let rom = match std::fs::File::open(config.rom) {
                 Ok(file) => file,
                 Err(error) => panic!("Couldn't open main rom! {:?}", error),
@@ -78,6 +72,86 @@ fn main() -> Result<()> {
             if let Err(error) = memory.load_rom(rom) {
                 println!("{:?}", error);
             };
+        }
+        2 => match &args[1] as &str {
+            "help" => {
+                println!("ʕ·ᴥ·ʔ- george-emu is an emulator for george:");
+                println!("https://git.augustkline.com/august/george\n");
+                println!("commands:");
+                println!("  help: print this help screen");
+                println!("  help <command>: print help info for any command");
+                println!("  rom <path>: load a rom/binary from path\n");
+                println!("configuration:");
+                println!("  george-emu searches for a `george.toml` in the current directory. in `george.toml` you can specify a path for the character rom using the key `char_rom` and the main rom/binary with the key `rom`");
+                exit(0);
+            }
+            _ => {
+                println!(
+                    "{:?} isn't a valid command!\n\nuse `{} help` to see all valid commands",
+                    &args[1], &args[0]
+                );
+                exit(1);
+            }
+        },
+        3 => match &args[1] as &str {
+            "help" => match &args[2] as &str {
+                "rom" => {
+                    println!("{:?} rom <path>\nload a rom/binary from path", &args[0]);
+                }
+                _ => {
+                    println!(
+                        "{:?} isn't a valid command!\n\nuse `{} help` to see all valid commands",
+                        &args[2], &args[0]
+                    );
+                    exit(1);
+                }
+            },
+            "rom" => {
+                let rom = match std::fs::File::open(&args[2]) {
+                    Ok(file) => file,
+                    Err(error) => {
+                        match error.kind() {
+                            ErrorKind::NotFound => {
+                                println!("couldn't find the rom at {:?}", &args[2]);
+                            }
+                            ErrorKind::PermissionDenied => {
+                                println!(
+                                    "didn't have sufficient permissions to open the rom at {:?}",
+                                    &args[2]
+                                );
+                            }
+                            _ => {
+                                println!("something went wrong! try again in a moment? really not sure why you're getting this error");
+                            }
+                        }
+                        exit(1);
+                    }
+                };
+                if let Err(error) = memory.load_rom(rom) {
+                    println!("oh no! this rom couldn't be loaded: {:?}", error);
+                    exit(1);
+                };
+            }
+            _ => {
+                println!(
+                    "{:?} isn't a valid command!\n\nuse `{} help` to see all valid commands",
+                    &args[1], &args[0]
+                );
+                exit(1);
+            }
+        },
+        _ => {
+            println!(
+                "too many arguments were provided!\n\nuse `{} help` to see all valid commands",
+                &args[0]
+            );
+            exit(1);
+        }
+    }
+    let mut stdout = stdout();
+    let (cols, rows) = size()?;
+    execute!(stdout, SetSize(64, 29), cursor::Hide, EnterAlternateScreen)?;
+    enable_raw_mode()?;
 
     memory
         .dump(PathBuf::from_str("./coredump.bin").unwrap())
@@ -88,11 +162,8 @@ fn main() -> Result<()> {
     let cpu_memory = shared_memory.clone();
     let keyboard_memory = shared_memory.clone();
 
-    let (cpu_tx, cpu_rx) = mpsc::channel();
+    // For when we want to leave the terminal again :sigh:
-    // let (state_tx, state_rx) = mpsc::channel();
+    //
-    let screen_cpu_tx = cpu_tx.clone();
-    // let (window_tx, window_rx) = mpsc::channel();
-
     // thread::spawn(move || {
     //     let mut screen = Crtc::new(
     //         screen_memory,
@@ -120,40 +191,30 @@ fn main() -> Result<()> {
     // )
     // .unwrap();
 
-    // window.set_input_callback(Box::new(Keyboard::new(keyboard_memory)));
+    let keyboard = Keyboard::new(keyboard_memory);
 
-    let mut cpu = Cpu::new(cpu_memory, CpuReceiver::new(cpu_rx));
+    let (mut cpu, cpu_controller) = Cpu::new_with_control(cpu_memory);
-    // let mut cpu = Cpu::new(cpu_memory);
+    let _ = cpu.reset();
-    // let mut tui = tui::App::new(
+
-    //     CpuController::new(cpu_tx.clone()),
+    thread::spawn(move || loop {
-    //     shared_memory.clone(),
+        cpu.cycle();
-    //     state_rx,
-    // );
-    thread::spawn(move || {
-        cpu.reset().unwrap();
-        cpu.memory.write(0x4400, 0b0000_0100);
-        cpu.execute()
     });
 
     let stdout_lock = stdout.lock();
     let renderer = TerminalRenderer::new(screen_memory, stdout_lock);
-    let mut screen = Screen::new(CpuController::new(cpu_tx.clone()), renderer);
+    let mut screen = Screen::new(renderer, cpu_controller);
-
-    // thread::spawn(move || {
-    //     screen.run();
-    // });
 
     loop {
+        sleep(Duration::from_millis(16));
+        screen.draw();
         if event::poll(std::time::Duration::from_millis(16))? {
             if let event::Event::Key(key) = event::read()? {
+                keyboard.read_keys(key);
                 if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
                     break;
                 }
             }
         }
-        // let buffer = window_rx.recv().unwrap();
-        screen.draw()
-        // tui.update(&mut terminal)?;
     }
 
     execute!(

src/memory.rs

@@ -1,10 +1,10 @@
-use crate::types::{Byte, Word};
 use anyhow::{bail, Result};
+use std::cell::RefCell;
 use std::io::{self, Write};
 use std::path::PathBuf;
+use std::rc::Rc;
 use std::str::FromStr;
-use std::sync::{Arc, Mutex, MutexGuard};
+use std::sync::{Arc, Mutex};
-use std::u16;
 use std::{fs::File, io::Read};
 
 #[derive(Clone, Debug)]
@@ -13,30 +13,25 @@ impl MemHandle {
     pub fn new(memory: Mem) -> Self {
         Self(Arc::new(Mutex::new(memory)))
     }
-    pub fn read(&self, address: Word) -> Byte {
+    pub fn read(&self, address: u16) -> u8 {
-        let memory = self.lock().unwrap();
+        let memory = self.0.lock().unwrap();
         memory.read(address)
     }
-    pub fn write(&self, address: Word, data: Byte) {
+    pub fn write(&self, address: u16, data: u8) {
-        let mut memory = self.lock().unwrap();
+        let mut memory = self.0.lock().unwrap();
         memory.write(address, data);
     }
 
     pub fn dump(&self) {
-        let memory = self.lock().unwrap();
+        let memory = self.0.lock().unwrap();
-        memory.dump(PathBuf::from_str("./cpu_dump.bin").unwrap());
+        let _ = memory.dump(PathBuf::from_str("./cpu_dump.bin").unwrap());
-    }
-
-    fn lock(&self) -> Result<MutexGuard<'_, Mem>> {
-        match self.0.lock() {
-            Ok(result) => Ok(result),
-            Err(error) => bail!("{error}"),
     }
+    pub fn poke(&self, address: u16) {
+        let memory = self.0.lock().unwrap();
+        memory.poke(address)
     }
 }
 
-// TODO: impl Iterator for MemHandle so we can get references to the underlying data from other threads without cloning
-
 pub trait MemoryReader {
     fn read(&self, address: u16) -> u8;
 }
@@ -45,19 +40,16 @@ pub trait MemoryWriter {
     fn write(&self, address: u16, data: u8);
 }
 
-// pub trait MemoryAccess: MemoryReader + MemoryWriter {}
+#[derive(Debug, Clone, Copy)]
-// impl<T> MemoryAccess for T where T: MemoryReader + MemoryWriter {}
+// This always feels wrong instead of 0xFFFF,
-
+// but remember it's the number of elements,
-#[derive(Debug, Clone)]
+// not the maximum index. 0x0000 to 0xFFFF addresses
-pub struct Mem {
+// 0x10000 elements
-    pub data: Vec<u8>,
+pub struct Mem([u8; 0x10000]);
-}
 
 impl Default for Mem {
     fn default() -> Self {
-        Self {
+        Self([0; 0x10000])
-            data: vec![0; u16::MAX as usize + 1],
-        }
     }
 }
 
@@ -67,23 +59,24 @@ impl Mem {
     }
     pub fn dump(&self, path: PathBuf) -> io::Result<()> {
         let mut outfile = File::create(path)?;
-        outfile.write_all(&self.data)?;
+        outfile.write_all(&self.0)?;
         Ok(())
     }
 
-    pub fn read(&self, address: Word) -> Byte {
+    pub fn read(&self, address: u16) -> u8 {
-        self.data[address as usize]
+        self.0[address as usize]
     }
 
-    pub fn write(&mut self, address: Word, data: Byte) {
+    pub fn write(&mut self, address: u16, data: u8) {
-        self.data[address as usize] = data;
+        self.0[address as usize] = data;
     }
 
     pub fn load_rom(&mut self, rom: File) -> Result<()> {
         let bytes = rom.bytes();
         for (address, byte) in bytes.enumerate() {
+            // println!("{address}");
             match byte {
-                Ok(value) => self.write(address as Word + 0x8000, value),
+                Ok(value) => self.write(address as u16 + 0x8000, value),
                 Err(_) => {
                     bail!("Loading rom: couldn't write byte {:#04x}", address);
                 }
@@ -91,11 +84,15 @@ impl Mem {
         }
         Ok(())
     }
+
+    pub fn poke(&self, address: u16) {
+        println!("{:02x}", self.read(address));
+    }
     //pub fn read_from_bin(&mut self, f: File) -> Result<()> {
     //    let bytes = f.bytes();
     //    for (address, byte) in bytes.enumerate() {
     //        match byte {
-    //            Ok(value) => self.write(address as Word, value),
+    //            Ok(value) => self.write(address as u16, value),
     //            Err(_) => {
     //                bail!("couldn't write byte {:#04x}", address);
     //            }

src/roms/george.asm

@@ -37,7 +37,7 @@ cleardisplay:
     ; cli
 
 main:
-    jsr keyboard
+    jsr printtext
     ; key_zero:
     ;     stz keyboard_cache, x
     ;     dex
@@ -45,164 +45,28 @@ main:
     ; fim: 
     ;     cli
     ;     bra fim
-    ; jsr kitty_keys
     jmp main
 
-; ; copying @smal rn: https://github.com/smaldragon/KittyEMU/blob/main/roms/foxmon.asm
+printtext:
-; char_timer = $10
+    ldx 0
-; line_buffer = $0200
+    loop:
-; char_cur = $11
+        lda text, x
-; line_buffer_i = $12
+        beq end
-; line_buffer_l = $13
+        sta $6000, x
+        inx
+        bra loop
+    end:
+        rts
 
-; keyboard_cache = $14
+text: 
-; line_cur = $20
+    .asciiz "hi <3"
 
-; irq:
-
-;     lda line_buffer_i
-;     lda $e0
-;     lda $6f
-;     sei
-;     stz char_cur
-;     lda line_buffer_i
-;     sta line_buffer_l
-;     ldx #4
-
-; kitty_keys: ; reads pressed key and writes keymap value to char_cur
-;     phx 
-;     txa
-;     asl
-;     asl
-;     asl
-;     asl
-;     asl ; i think this is supposed to be once for every keyboard row
-;     tax
-;     lda kb_row, x
-;     plx
-
-;     pha
-;     cmp keyboard_cache, x
-;     bne change
-;     jmp nochange
-;     change:
-;         bit7:
-;             asl keyboard_cache, x
-;             bcs bit6
-;             bit #0b10000000
-;             beq bit6
-;             pha
-;             lda keymap_7, x
-;             sta char_cur
-;             pla
-;         bit6:
-;             asl keyboard_cache, x
-;             bcs bit5
-;             bit #0b01000000
-;             beq bit5
-;             pha
-;             lda keymap_6, x
-;             sta char_cur
-;             pla
-;         bit5:
-;             asl keyboard_cache, x
-;             bcs bit4
-;             bit #0b00100000
-;             beq bit4
-;             pha
-;             lda keymap_5, x
-;             sta char_cur
-;             pla
-;         bit4:
-;             asl keyboard_cache, x
-;             bcs bit3
-;             bit #0b00010000
-;             beq bit3
-;             pha
-;             lda keymap_4, x
-;             sta char_cur
-;             pla
-;         bit3:
-;             asl keyboard_cache, x
-;             bcs bit2
-;             bit #0b00001000
-;             beq bit2
-;             pha
-;             lda keymap_3, x
-;             sta char_cur
-;             pla
-;         bit2:
-;             asl keyboard_cache, x
-;             bcs bit1
-;             bit #0b00000100
-;             beq bit1
-;             pha
-;             lda keymap_2, x
-;             sta char_cur
-;             pla
-;         bit1:
-;             asl keyboard_cache, x
-;             bcs bit0
-;             bit #0b00000010
-;             beq bit0
-;             pha
-;             lda keymap_1, x
-;             sta char_cur
-;             pla
-;         bit0:
-;             asl keyboard_cache, x
-;             bcs bitend
-;             bit #0b00000001
-;             beq bitend
-;             pha
-;             lda keymap_0, x
-;             sta char_cur
-;             pla
-;         bitend:
-;     nochange:
-;         pla
-;         sta keyboard_cache, x
-;         dex
-;         bmi keyend
-;         jmp kitty_keys
-;         keyend:
-
-;     write:
-;         lda char_cur
-;         ldy cursor
-;         sta $6000, y
-;         inc cursor
-;         rts
-
-
-; ; col = keyboard row, row = keyboard bit placement inverted
-; keymap_0:
-;     .byte "??????"
-; keymap_1:
-;     .byte "wqdzx "
-; keymap_2:
-;     .byte "esvfc "
-; keymap_3:
-;     .byte "rghbn?"
-; keymap_4:
-;     .byte "tykjm?"
-; keymap_5:
-;     .byte "ui?l??"
-; keymap_6:
-;     .byte "op?21?"
-; keymap_7:
-;     .byte "??a43?"
-;
-;
 keyboard:
-    ldy #0
-    x
-
-not_keyboard:
     ldy #0 
     .check_row: ; loop through each row
         lda kb_row, y
         beq .skip_row ; if row has no key pressed, skip checking which key
+        ; jmp key_down
         sta kb_row_cache, y ; if key pressed, cache it
         lda kb_row, y
         cmp kb_row_cache, y ; has key changed?

src/roms/keyboard.asm

@@ -1,26 +1,16 @@
 ; .setcpu "65C02"
     .include "./macro.inc"
 
-; okay so rn i wanna set up a very basic system init, and write a few subroutines to draw characters at x,y coordinates
-n = $01 ; temporary storage for data stack operations
-
-key_row = $200 ; used for character lookup when key pressed
-key_col = $201
-cursor = $202
-
-char_buffer = $300 ; 256 byte character buffer
-
-kb_row = $4400 ; keyboard hardware register, there are 5 more but i can just increment from here
-kb_row_cache = $203 ; cache 
-
     .org $8000
 
+n = $01 ; temporary storage for data stack operations
+
 reset:
     sei
     ldx #0; initialize data stack pointer
 
 initdisplay:
-    lda #$20
+    lda #0
     ldy #0
 
 cleardisplay:
@@ -37,56 +27,13 @@ cleardisplay:
     cli
 
 main:
-    jsr draw
+    ; jmp draw
+    jmp cleardisplay
     jmp main
 
-keyboard:
-    ldy #5
-    .loop: ; loop through each row
-        lda kb_row, y
-        bne key_down; if row has key pressed, go to key_down subroutine
-        dey
-        bne .loop
-    rts
-
-key_down:               ; a is loaded with the row byte
-    sty key_row         ; store character row
-    inc cursor
-    pha
-    phy
-    ldy #0
-    .find_col:          ; test each row bit, store column if key pressed
-        lsr             ; test bit 7
-        bcs store_col       ; if unset, don't go store character columnb
-        .skip:
-            iny
-            cpy #8
-            bne .find_col   ; loop until we've checked each bit
-
-do_something_w_key: ; we've stored the character position, now let's 
-    lda keymap, y
-    ldy cursor
-    sta $6000, y
-    ply
-    pla
-    rts
-
-keymap_0:
-    .byte "?outrew?"
-keymap_1:
-    .byte "?piygsq?"
-keymap_2:
-    .byte "a??khvd?"
-keymap_3:
-    .byte "42ljbfz?"
-keymap_4:
-    .byte "31?mncx?"
-keymap_5:
-    .byte "?????  m"
-
 draw:
     push_coords #0, #0
-    push_char #$00
+    push_char #$af
     jsr draw_char
     rts
 
@@ -125,11 +72,16 @@ get_char_address:   ; gets vram address for a character at (x, y),
 fill: ; fills an area from (x1, y1) to (x2, y2) will character c, (n1: c n2: x1 n3: y1 n4: x2 n5: y2 -- )
     jsr get_char_address
 
+irq: 
+
+    keyboard:
+    rts
+
 isr: ; interrupt service routine
     pha
     phx
     phy
-    jsr keyboard
+    jsr irq
     ply
     plx
     pla

src/roms/template.asm

@@ -0,0 +1,88 @@
+; .setcpu "65C02"
+    .include "./macro.inc"
+
+    .org $8000
+
+n = $01 ; temporary storage for data stack operations
+
+reset:
+    sei
+    ldx #0; initialize data stack pointer
+
+initdisplay:
+    lda #0
+    ldy #0
+
+cleardisplay:
+    sta $6000,y
+    sta $6100,y
+    sta $6200,y
+    sta $6300,y
+    sta $6400,y
+    sta $6500,y
+    sta $6600,y
+    sta $6700,y ; this goes slightly over but it's fine
+    iny
+    bne cleardisplay
+    cli
+
+main:
+    jmp draw
+    jmp main
+
+draw:
+    push_coords #0, #0
+    push_char #$af
+    jsr draw_char
+    rts
+
+draw_char: ; draw a character c at (x, y) (n1: x n2: y n3: c -- )
+    lda 0, x ; load a with character to draw
+    pop ; and pop it off the stack
+    jsr get_char_address ; calculate where to put the character in memory
+    sta (0, x) ; store a at the address pointed to on the stack
+    rts
+
+get_char_address:   ; gets vram address for a character at (x, y),
+                    ; (n1: x n2: y -- n: $6000 + x + (64 * y))
+    ;jsr push_lit ; push 64 onto stack, low byte first
+    ;.byte 64
+    ;.byte 0
+    pha
+    lda #64
+    push ; doing this instead until `push_lit` is fixed
+    sta 0, x
+    stz 1, x
+    jsr mult ; multiply 64 with y (n2)
+    jsr plus ; add result with x (n1)
+
+    ;jsr push_lit ; push vram address onto the stack
+    ;.byte $00
+    ;.byte $60
+    lda #$60
+    push
+    sta 1, x
+    stz 0, x
+    jsr plus ; add vram start address to result
+
+    pla
+    rts
+
+fill: ; fills an area from (x1, y1) to (x2, y2) will character c, (n1: c n2: x1 n3: y1 n4: x2 n5: y2 -- )
+    jsr get_char_address
+
+isr: ; interrupt service routine
+    pha
+    phx
+    phy
+    ; jsr irq
+    ply
+    plx
+    pla
+    rti
+
+    .include "math.inc"
+
+    .org $fffc
+    .word reset
+    .word isr

src/video.rs

@@ -1,21 +1,21 @@
 use crossterm::{
-    cursor::{MoveTo, SavePosition},
+    cursor::{MoveTo, RestorePosition, SavePosition},
     execute, queue,
     style::{Color, PrintStyledContent, Stylize},
 };
 
 use crate::{
     cpu::CpuController,
-    memory::{self, MemHandle, MemoryReader},
+    memory::{MemHandle, MemoryReader},
     types::{Byte, Word},
 };
 use std::{
     fs::File,
-    io::{Read, Stdout, StdoutLock, Write},
+    io::{Read, StdoutLock, Write},
     path::Path,
+    process::exit,
     sync::mpsc::Sender,
-    thread::sleep,
+    time::Instant,
-    time::Duration,
 };
 
 const FG_COLOR: u32 = 0xFFCC00;
@@ -73,7 +73,7 @@ impl Renderer for WindowRenderer {
         let mut buffer = vec![0; 512 * 380];
         for char_row in 0..29 {
             for char_col in 0..64 {
-                let ascii = self.memory.read(0x6000 + i);
+                let ascii = self.read(0x6000 + i);
                 i += 1;
                 for row in 0..13 {
                     let byte = self.char_rom[ascii as usize + (row * 0x100)];
@@ -118,7 +118,7 @@ impl MemoryReader for TerminalRenderer<'_> {
     }
 }
 
-static ASCII_LOOPUP: [&str; 256] = [
+const ASCII_LOOPUP: [&str; 256] = [
     " ", "░", "▒", "▓", "♡", "♥", "⭐", "✭", "", "✦", "✨", "♀", "♂", "⚢", "⚣", "⚥", "♩", "♪",
     "♫", "♬", "ﱝ", "", "", "", "奄", "奔", "婢", "ﱜ", "ﱛ", "", "", "", " ", "!", "\"", "#",
     "$", "%", "&", "\'", "(", ")", "*", "+", ",", "-", ".", "/", "0", "1", "2", "3", "4", "5", "6",
@@ -137,11 +137,12 @@ static ASCII_LOOPUP: [&str; 256] = [
 
 impl Renderer for TerminalRenderer<'_> {
     fn render(&mut self) {
+        // let now = Instant::now();
         let _ = execute!(self.stdout, SavePosition);
         let mut i = 0;
         for char_row in 0..29 {
             for char_col in 0..64 {
-                let ascii = self.memory.read(0x6000 + i);
+                let ascii = self.read(0x6000 + i);
                 i += 1;
                 let char = ASCII_LOOPUP[ascii as usize];
                 let _ = queue!(
@@ -165,32 +166,36 @@ impl Renderer for TerminalRenderer<'_> {
             }
         }
         let _ = self.stdout.flush();
+        let _ = execute!(self.stdout, RestorePosition);
+        // let elapsed = now.elapsed();
+        // println!("{elapsed:?}");
+        // exit(0);
     }
 }
 
 pub struct Screen<'a> {
-    cpu_controller: CpuController,
     // renderer: Box<dyn Renderer>,
     renderer: TerminalRenderer<'a>,
+    controller: CpuController,
 }
 
 impl<'a> Screen<'a> {
     // pub fn new(cpu_controller: CpuController, renderer: Box<dyn Renderer>) -> Self {
-    pub fn new(cpu_controller: CpuController, renderer: TerminalRenderer<'a>) -> Self {
+    pub fn new(renderer: TerminalRenderer<'a>, controller: CpuController) -> Self {
         Self {
-            cpu_controller,
             renderer,
+            controller,
         }
     }
     pub fn draw(&mut self) {
+        self.controller.irq();
         self.renderer.render();
     }
 
-    pub fn run(&mut self) {
+    // pub fn run(&mut self) {
-        loop {
+    //     loop {
-            self.cpu_controller.irq();
+    //         // sleep(Duration::from_millis(16));
-            sleep(Duration::from_millis(16));
+    //         self.draw();
-            self.draw();
+    //     }
-        }
+    // }
-    }
 }