base (clock): implemented a basic clocking structure

Cargo.toml

@@ -0,0 +1,2 @@
+[workspace]
+members = ["base", "architectures/*"]

base/Cargo.toml

@@ -12,3 +12,5 @@ crate-type = ["cdylib"]
 
 [dependencies]
 wasm-bindgen = "0.2"
+console_error_panic_hook = "0.1"
+chrono = "0.4"

base/src/clock/mod.rs

@@ -0,0 +1,57 @@
+#[path = "../utils/mod.rs"]
+mod utils;
+
+use chrono::{Utc};
+use crate::utils::utils_log;
+
+pub struct NemuClock {
+    hertz: u32,
+    cycle_duration: u32,
+    command_queue: Vec<fn()>
+}
+
+impl NemuClock {
+    pub fn init(hertz: u32) -> NemuClock{
+        let mut clock = NemuClock {
+            hertz,
+            cycle_duration: 0,
+            command_queue: Vec::new()
+        };
+        clock.hertz_set(hertz);
+
+        return clock;
+    }
+
+    pub fn debug_info(&mut self) {
+        utils_log(&format!("Clock -> Hertz: {}  Cycle Duration (nano): {}", self.hertz, self.cycle_duration));
+    }
+
+    pub fn hertz_set(&mut self, hertz:u32) {
+        self.hertz          = hertz;
+        self.cycle_duration = 1000000000 / hertz;   // this is the duration of on cycle in nanoseconds
+    }
+
+    pub fn hertz_get(self) -> u32 {
+        return self.hertz;
+    }
+
+    pub fn add_command(&mut self, command:fn()) {
+        self.command_queue.push(command);
+    }
+
+    pub fn run(&mut self) {
+
+        while true {
+            let cycle_start = Utc::now().timestamp_subsec_nanos();
+            let cycle_end   = cycle_start + self.cycle_duration;
+
+            utils_log(&format!("Clock -> Tick  start: {}  end: {}", cycle_start, cycle_end));
+
+            for command in &self.command_queue {
+                command();
+            }
+
+            while Utc::now().timestamp_subsec_nanos() < cycle_end {};
+        }
+    }
+}

base/src/lib.rs

@@ -1,11 +1,24 @@
+mod clock;
+mod utils;
+extern crate console_error_panic_hook;
+
+use std::ptr::null;
 use wasm_bindgen::prelude::*;
+use crate::clock::NemuClock;
+use crate::utils::utils_log;
 
-#[wasm_bindgen]
-extern {
-    pub fn alert(s: &str);
+fn test() {
+    utils_log("test");
 }
 
 #[wasm_bindgen]
-pub fn greet(name: &str) {
-    alert(&format!("Hello, {}!", name));
+pub fn nemu_init() {
+    console_error_panic_hook::set_once();
+    utils_log("starting nemu");
+    let mut clock = NemuClock::init(8000);
+
+    clock.add_command(test, );
+
+    clock.debug_info();
+    clock.run();
 }

base/src/utils/mod.rs

@@ -0,0 +1,18 @@
+use wasm_bindgen::prelude::*;
+
+
+#[wasm_bindgen]
+extern {
+    fn alert(s: &str);
+
+    #[wasm_bindgen(js_namespace = console)]
+    fn log(s: &str);
+}
+
+pub fn utils_log(s: &str) {
+    log(&format!("{}", s));
+}
+
+pub fn utils_panic(s: &str) {
+    alert(&format!("Panic: {}", s));
+}

index.html

@@ -38,10 +38,10 @@
     
     <script src="test.js"></script>
     <script type="module">
-        import init, { greet } from "./base/pkg/nemu_base.js";
+        import init, { nemu_init } from "./base/pkg/nemu_base.js";
         
         init().then(() => {
-            greet("NerdEMU");
+            nemu_init();
         });
     </script>
 </html>

systems/8086.json

@@ -2,5 +2,13 @@
     "name": "i8086",
     "version": "0.0",
 
-  "architecture": "x86"
+    "architecture": {
+        "id": "x86"
+    },
+
+    "devices": {
+        "monitor": {
+            "mode": "VGA"
+        }
+    }
 }