Began replacement of VGA functions

Why does VGA/VESA not work when running on real hardware?

2 files changed, 7 insertions, 5 deletions

diff --git a/src/kernel/graphics/vesa.c b/src/kernel/graphics/vesa.c
index 9ea83aa..120ff15 100644
--- a/src/kernel/graphics/vesa.c
+++ b/src/kernel/graphics/vesa.c
@@ -1,19 +1,16 @@
 #include "vesa.h"
-#include "graphics.h"
-#include "../input/input.h"
 #include "../system.h"
 #include "../lib/lib.h"
 
 void switch_to_vga() {
+    vesa_available = 0;
     regs16_t regs;
     regs.ax = 0x0003;
     int32(0x10, &regs);
-    init();
-    terminal_write_line("FAILED!");
-    keyboard_install();
 }
 
 struct vbe_mode_info *vbe_set_mode(unsigned short mode) {
+    vesa_available = 0;
     regs16_t regs;
     regs.ax = 0x4F02;
     regs.bx = mode | (1 << 14);
@@ -47,6 +44,8 @@ struct vbe_mode_info *vbe_set_mode(unsigned short mode) {
         regs.ax = 0x0003;
         int32(0x10, &regs);
 
+        vesa_available = 1;
+
         return vbe_info;
     } else {
         switch_to_vga();
@@ -57,6 +56,7 @@ struct vbe_mode_info *vbe_set_mode(unsigned short mode) {
 }
 
 void set_optimal_resolution() {
+    vesa_available = 0;
     struct vbe_info *info = (struct vbe_info *) 0x2000;
     struct vbe_mode_info *mode_info = (struct vbe_mode_info *) 0x3000;
 
diff --git a/src/kernel/graphics/vesa.h b/src/kernel/graphics/vesa.h
index eff74ea..83c6ad2 100644
--- a/src/kernel/graphics/vesa.h
+++ b/src/kernel/graphics/vesa.h
@@ -4,6 +4,8 @@
 #include <stdint.h>
 #include "../system.h"
 
+int vesa_available;
+
 /**
  * The CPUs response to the 0x4F00 call
  * Used to receive the supported video modes