From 5b75cdd06f266d384491f51f0e92226b5e19ea3b Mon Sep 17 00:00:00 2001
From: Stefan Zabka <zabkaste@hu-berlin.de>
Date: Thu, 30 Apr 2020 09:32:16 +0200
Subject: Added sources

---
 01_exercise/bootloader.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/01_exercise/bootloader.c b/01_exercise/bootloader.c
index 403586b..1ba5786 100644
--- a/01_exercise/bootloader.c
+++ b/01_exercise/bootloader.c
@@ -5,6 +5,7 @@ asm(".code16gcc\njmp $0, $main");
 
 char WRITE_CHARACTER_TTY = 0x0E;
 
+// Syscall found here http://www.ctyme.com/intr/rb-0106.htm
 void put(char c) {
     short command = WRITE_CHARACTER_TTY << 8 | c;
     // volatile because there is no output, so the function might get optimized
@@ -23,6 +24,7 @@ void print(char const *const str) {
     }
 }
 
+// Syscall found here http://www.ctyme.com/intr/rb-1754.htm
 char getc() {
     char ret;
     asm("mov $0x00, %%ah;"
-- 
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