From 9970a04cc988d8de5a54097620bafb2cca09636e Mon Sep 17 00:00:00 2001
From: Ry <ryanst755@gmail.com>
Date: Fri, 9 Sep 2022 16:16:09 -0700
Subject: [PATCH] Implement an RTC, bump version to 0.4.0

---
 Cargo.lock  | 30 ++++++++++++++++++++++++++++--
 Cargo.toml  |  3 ++-
 src/bus.rs  | 30 ++++++++++++++++++++++++++++++
 src/main.rs |  2 ++
 4 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 4ccfda5..3c45f67 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -349,6 +349,20 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fd16c4719339c4530435d38e511904438d07cce7950afa3718a84ac36c10e89e"
 
+[[package]]
+name = "chrono"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6127248204b9aba09a362f6c930ef6a78f2c1b2215f8a7b398c06e1083f17af0"
+dependencies = [
+ "js-sys",
+ "num-integer",
+ "num-traits",
+ "time 0.1.44",
+ "wasm-bindgen",
+ "winapi",
+]
+
 [[package]]
 name = "clang-sys"
 version = "1.3.1"
@@ -852,9 +866,10 @@ dependencies = [
 
 [[package]]
 name = "fox32"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "anyhow",
+ "chrono",
  "image",
  "log",
  "pixels",
@@ -2557,6 +2572,17 @@ dependencies = [
  "weezl",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
+dependencies = [
+ "libc",
+ "wasi",
+ "winapi",
+]
+
 [[package]]
 name = "time"
 version = "0.3.13"
@@ -2665,7 +2691,7 @@ dependencies = [
  "git2",
  "rustversion",
  "thiserror",
- "time",
+ "time 0.3.13",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 04d602c..ed39913 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,11 +1,12 @@
 [package]
 name = "fox32"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["ry"]
 edition = "2021"
 build = "build.rs"
 
 [dependencies]
+chrono = "0.4"
 image = "0.24"
 log = "0.4"
 pixels = "0.9.0"
diff --git a/src/bus.rs b/src/bus.rs
index 486b899..51185fc 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -2,6 +2,7 @@
 
 use crate::{Memory, AudioChannel, DiskController, Keyboard, Mouse, Overlay};
 
+use chrono::prelude::*;
 use std::sync::{Arc, Mutex};
 use std::io::{Write, stdout};
 
@@ -19,6 +20,8 @@ pub struct Bus {
     pub mouse: Arc<Mutex<Mouse>>,
 
     pub overlays: Arc<Mutex<Vec<Overlay>>>,
+
+    pub startup_time: i64,
 }
 
 impl Bus {
@@ -109,6 +112,33 @@ impl Bus {
                     _ => panic!("invalid audio channel"),
                 }
             }
+            0x80000700..=0x80000706 => { // RTC port
+                let setting = (port & 0x000000FF) as u8;
+                match setting {
+                    0 => { // year
+                        Local::now().year() as u32
+                    },
+                    1 => { // month
+                        Local::now().month()
+                    },
+                    2 => { // day
+                        Local::now().day()
+                    },
+                    3 => { // hour
+                        Local::now().hour()
+                    },
+                    4 => { // minute
+                        Local::now().minute()
+                    },
+                    5 => { // second
+                        Local::now().second()
+                    },
+                    6 => { // milliseconds elapsed since startup
+                        (Local::now().timestamp_millis() - self.startup_time) as u32
+                    },
+                    _ => panic!("invalid RTC port"),
+                }
+            }
             0x80001000..=0x80002003 => { // disk controller port
                 let id = port as u8;
                 let operation = (port & 0x0000F000) >> 8;
diff --git a/src/main.rs b/src/main.rs
index 0773712..940d28a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,6 +22,7 @@ use std::process::exit;
 use std::env;
 use std::fs::{File, read};
 
+use chrono::prelude::*;
 use image;
 use log::error;
 use pixels::{Pixels, SurfaceTexture};
@@ -97,6 +98,7 @@ fn main() {
         keyboard: keyboard.clone(),
         mouse: mouse.clone(),
         overlays: display.overlays.clone(),
+        startup_time: Local::now().timestamp_millis(),
     };
 
     if args.len() > 1 {