From 43e8caefdf80c6f7945c09a42ba09f70d907e68e Mon Sep 17 00:00:00 2001
From: "E. Almqvist" <elalmqvist@gmail.com>
Date: Wed, 11 Aug 2021 19:36:51 +0200
Subject: [PATCH] Added VGA print

---
 src/kernel.c  |  7 +++----
 src/lib/vga.c | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 4 deletions(-)
 create mode 100644 src/lib/vga.c

diff --git a/src/kernel.c b/src/kernel.c
index c5bc72d..4076de7 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -1,7 +1,6 @@
-// VGA base address: 0xb8000
-// Charpos = 0xb8000 + 2(row*80 + col)
+#include "lib/vga.c"
 
 void main() {
-	char* video_mem = (char*)0xb8000; // VGA Video Memory location
-	*video_mem = 'X'; 
+	// Do kernel stuff
+	println("HEJ", 3);
 }
diff --git a/src/lib/vga.c b/src/lib/vga.c
new file mode 100644
index 0000000..61e6275
--- /dev/null
+++ b/src/lib/vga.c
@@ -0,0 +1,18 @@
+// VGA Graphics Library
+
+// VGA base address: 0xb8000
+// Charpos = 0xb8000 + 2(row*80 + col)
+
+#define VIDEO_MEM (char*)0xb8000
+static char* cursor_pos = VIDEO_MEM;
+static int cursor_y = 0;
+
+void set_cursor_pos(int row, int col) { cursor_pos = (char*)(VIDEO_MEM + 2*(row*80 + col)); }
+
+void println(char* str, int str_len) {
+	for( int i = 0; i < str_len; i++ ) {
+		set_cursor_pos(i, cursor_y); 	// set cursor pos
+		*cursor_pos = str[i];		// Write char to video memory
+	}
+	cursor_y++;				// Increment to next y-pos (newline)
+}