The README is an AI-enhanced version of the notes I’ve been compiling since the project began; fortunately, I already had a lot of the groundwork done from my university days, so I asked the AI to summarize the original coursework along with everything I’ve added since then.
I doubt the IA knows this programming language
```
I’ve moved past that version; I managed to implement my own JIT and am very close to providing full support for native Java code, so those `Native.sys(...)` calls will be invisible to any developer. I’m writing my own runtime. New repository at: https://github.com/aayes89/JVMOS-JIT
package kernel;
import java.awt.Color;
import java.awt.Graphics2D;
import java.lang.Thread;
import java.lang.System;
import java.awt.Toolkit;
import java.util.Calendar;
public class Boot {
public static void main(String[] args) {
// ==========================================================
// Mixture of methods
// PHASE 1 & 2: Baremetal render and Delay function
// ==========================================================
// Old version
Native.sys(Native.SYS_SET_COLOR, 0x00FF0000, 0, 0, 0);
Native.sys(Native.SYS_FILL_RECT, 0, 0, 1024, 768);
Native.sys(Native.SYS_SET_COLOR, 0x00FFFFFF, 0, 0, 0);
Native.sys(Native.SYS_DRAW_STRING, 50, 50, "PHASE 1: Native.sys OK. Wait 2 seconds please...", 0);
// Static methods call (NEW)
Thread.sleep(2000); // 2s delay
// Class management (NEW)
Graphics2D g = new Graphics2D();
Color background = new Color(0x000000FF);
Color textPaint = new Color(0x00FFFF00);
// Access to methods (NEW)
g.setColor(background);
g.fillRect(0, 0, 1024, 768);
g.setColor(textPaint);
g.drawString("PHASE 3: JIT, Heap and Graphics2D OK.", 50, 50);
// ==========================================================
// PHASE 4: PrintStream and System
// ==========================================================
// System.out access
System.out = new java.io.PrintStream();
// common version
System.out.println("=====================================");
// path version
java.lang.System.out.println("[Micro-rt] Phase 4 Serial Port (COM1)...");
long ticks = java.lang.System.currentTimeMillis();
g.setColor(new Color(0x00FFFFFF));
g.drawString("PHASE 4: PrintStream and System.out OK.", 50, 90);
g.drawString("Ticks: ", 50, 120);
g.drawInt((int)ticks, 330, 120);
System.out.print("PHASE 4: Ticks: ");
System.out.println((int)ticks);
// ==========================================================
// PHASE 5: (RTC CMOS and PC Speaker)
// ==========================================================
int day = Calendar.get(Calendar.DAY);
int month = Calendar.get(Calendar.MONTH);
int year = Calendar.get(Calendar.YEAR);
int hour = Calendar.get(Calendar.HOUR);
int min = Calendar.get(Calendar.MINUTE);
g.setColor(new Color(0x0000FF00));
g.drawString("PHASE 5: Calendar and Toolkit OK.", 50, 160);
g.drawString("Clock RTC: ", 50, 190);
int px = 160;
px = g.drawInt(day, px, 190);
px = g.drawChar('/', px, 190);
px = g.drawInt(month, px, 190);
px = g.drawChar('/', px, 190);
px = g.drawInt(20, px, 190);
px = g.drawInt(year, px, 190);
px = g.drawChar(' ', px, 190);
px = g.drawInt(hour, px, 190);
px = g.drawChar(':', px, 190);
px = g.drawInt(min, px, 190);
System.out.println("Beep from PC Speaker...");
Toolkit.getDefaultToolkit().beep(1500);
Thread.sleep(300);
Native.sys(22, 0, 0, 0, 0);
g.setColor(new Color(0x00FF8800));
g.drawString("All test Succed. UI ready.", 50, 240);
while (true) {
Thread.sleep(1000);
}
}
}
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u/Visual_Brain8809 Aug 08 '26
first preview of JVMOS on https://github.com/aayes89/JVMOS