From c053056b8effb5c35454f8e90548f43be0ce1ef0 Mon Sep 17 00:00:00 2001
From: Uko Kokņevičs
Date: Sat, 24 Feb 2024 18:01:09 +0200
Subject: Initial Commit

---
 .gitignore     |   2 ++
 README.org     |  18 ++++++++++++++++++
 boot.asm       |  49 +++++++++++++++++++++++++++++++++++++++++++++++++
 boot.bin       | Bin 0 -> 512 bytes
 screenshot.png | Bin 0 -> 389422 bytes
 5 files changed, 69 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.org
 create mode 100644 boot.asm
 create mode 100644 boot.bin
 create mode 100644 screenshot.png

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c730676
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.html
+tmp/
diff --git a/README.org b/README.org
new file mode 100644
index 0000000..998831f
--- /dev/null
+++ b/README.org
@@ -0,0 +1,18 @@
+#+TITLE: MBR Trans Flag
+#+OPTIONS: author:nil num:nil timestamp:nil toc:nil
+#+HTML_DOCTYPE: html5
+#+HTML_LINK_HOME: /
+#+HTML_LINK_UP: /
+What it says on the tin.
+* Source code download
+[[./boot.asm]], compilation and launch instructions included in file.
+* Binary pre-compiled file
+[[./boot.bin]] (maybe not a 1-to-1 compiled version).
+#+BEGIN_SRC sh
+  $ qemu-system-i386 -fda ./boot.bin
+#+END_SRC
+* Screenshat
+#+ATTR_HTML: :width 80%
+[[./screenshot.png]]
+* Source code listing
+#+INCLUDE: "./boot.asm" src nasm
diff --git a/boot.asm b/boot.asm
new file mode 100644
index 0000000..f80ba16
--- /dev/null
+++ b/boot.asm
@@ -0,0 +1,49 @@
+;; This thing is licensed under Creative Commons Zero v1.0 Universal, which essentially means
+;; "Public Domain".  (You can do anything you want without asking for permission).
+;;
+;; SPDX-License-Identifier: CC0-1.0
+;;
+;; To compile
+;; $ nasm -f bin -o boot.bin boot.asm
+;;
+;; To run
+;; $ qemu-system-i386 -fda boot.bin
+;;
+;; You can also run this by burning it to a floppy or a hard drive but I am not to be held
+;; responsible for any lost partitions, filesystems, or bootloaders.
+
+BITS 16
+
+    mov ax, 0xB800
+    mov es, ax
+    xor di, di
+
+    mov ax, 0xBB20
+    mov cx, 80*5
+    rep stosw
+
+    mov ah, 0xDD
+    mov cx, 80*5
+    rep stosw
+
+    mov ah, 0xFF
+    mov cx, 80*5
+    rep stosw
+
+    mov ah, 0xDD
+    mov cx, 80*5
+    rep stosw
+
+    mov ah, 0xBB
+    mov cx, 80*5
+    rep stosw
+
+halt:
+    cli
+    hlt
+    jmp halt
+
+    ; There's still ~463 bytes free here
+
+    times 510-($-$$) db 0
+    dw 0xAA55
diff --git a/boot.bin b/boot.bin
new file mode 100644
index 0000000..00982f3
Binary files /dev/null and b/boot.bin differ
diff --git a/screenshot.png b/screenshot.png
new file mode 100644
index 0000000..b632270
Binary files /dev/null and b/screenshot.png differ
-- 
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