From a3b999593f381a4b0da537d3160014753db4d428 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Mon, 28 Sep 2015 21:58:14 -0700
Subject: vga graphics for return, newln, short, and int

---
 src/output/vga_character.c | 23 ++++++++++++++++++++++-
 src/output/vga_character.h |  7 ++++---
 2 files changed, 26 insertions(+), 4 deletions(-)

(limited to 'src/output')

diff --git a/src/output/vga_character.c b/src/output/vga_character.c
index bd59a97..78b75f2 100644
--- a/src/output/vga_character.c
+++ b/src/output/vga_character.c
@@ -28,8 +28,22 @@ void vga_graphics_byte_hex(char value) {
   vga_graphics_write(HEX_CHARS[low]);
 }
 
+void vga_graphics_short_hex(short value) {
+  char low = value & 0xff;
+  char high = (value & 0xff00) >> 8;
+  vga_graphics_byte_hex(high);
+  vga_graphics_byte_hex(low);
+}
+
+void vga_graphics_int_hex(int value) {
+  short low = value & 0xffff;
+  short high = (value & 0xffff0000) >> 16;
+  vga_graphics_short_hex(high);
+  vga_graphics_short_hex(low);
+}
+
 void vga_graphics_write_at_offset(char value, short offset) {
-  __asm__(
+  __asm__ volatile (
     "mov %0, %%al          \n"
     "mov %1, %%di          \n"
     "mov %%al, %%gs:(%%di) \n"
@@ -47,3 +61,10 @@ void vga_graphics_clear() {
   }
   CURSOR_LOC = 0;
 }
+
+void vga_graphics_newln() {
+  CURSOR_LOC += 80 * 2;
+}
+void vga_graphics_return() {
+  CURSOR_LOC = CURSOR_LOC - (CURSOR_LOC % 160);
+}
diff --git a/src/output/vga_character.h b/src/output/vga_character.h
index 0d067f3..ca60573 100644
--- a/src/output/vga_character.h
+++ b/src/output/vga_character.h
@@ -7,10 +7,11 @@ void vga_graphics_write_with_attr(char, char);
 void vga_graphics_write_str(char*);
 
 void vga_graphics_byte_hex(char);
-//void vga_graphics_short_hex(short);
-//void vga_graphics_int_hex(int);
-//void vga_graphics_long_hex(long);
+void vga_graphics_short_hex(short);
+void vga_graphics_int_hex(int);
 
 void vga_graphics_clear(void);
+void vga_graphics_return(void);
+void vga_graphics_newln(void);
 
 #endif
-- 
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