From fe69547f2df151b371acdd99adb7167842382136 Mon Sep 17 00:00:00 2001
From: "E. Almqvist" <elalmqvist@gmail.com>
Date: Tue, 10 Aug 2021 23:07:19 +0200
Subject: [PATCH] Kernel & compiling script rework

---
 compile.sh   | 12 +++++++++++-
 src/kernel.c |  7 +++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 src/kernel.c

diff --git a/compile.sh b/compile.sh
index b009096..ccdc9cd 100755
--- a/compile.sh
+++ b/compile.sh
@@ -1,6 +1,16 @@
 #!/usr/bin/bash
 
+done="[OK]"
+fail="[FAIL]"
+
 srcDir=src
 binDir=bin
 
-nasm -f bin $srcDir/bootloader.asm -i $srcDir -o $binDir/bootloader.bin
+echo -n "Compiling bootloader... "
+nasm -f bin $srcDir/bootloader.asm -i $srcDir -o $binDir/bootloader.bin && echo $done
+
+echo -n "Compiling kernel... "
+gcc -ffreestanding -c $srcDir/kernel.c -o $binDir/kernel.o && ld -o $binDir/kernel.bin -Ttext 0x1000 $binDir/kernel.o --oformat binary 2>/dev/null && echo $done
+
+echo -n "Creating kernel image... "
+cat $binDir/bootloader.bin $binDir/kernel.bin > $binDir/os-image && echo $done
diff --git a/src/kernel.c b/src/kernel.c
new file mode 100644
index 0000000..c5bc72d
--- /dev/null
+++ b/src/kernel.c
@@ -0,0 +1,7 @@
+// VGA base address: 0xb8000
+// Charpos = 0xb8000 + 2(row*80 + col)
+
+void main() {
+	char* video_mem = (char*)0xb8000; // VGA Video Memory location
+	*video_mem = 'X'; 
+}