@@ -0,0 +1,6 @@
+#ifndef GRAPHICS_H
+#define GRAPHICS_H
+
+int graphics_set_mode(int mode);
+
+#endif

@@ -53,4 +53,9 @@ int sc_file_open(char *pathname, int flags) {
     volatile uint32_t res = 0;
     interrupt(0x30, res, 6, pathname, flags, 0);
     return res;
+}
+
+void graphics_set_mode(int mode) {
+    volatile uint32_t res = 0;
+    interrupt(0x30, res, 7, mode, 0, 0);
 }

@@ -11,6 +11,8 @@ int get_pid();
 int process_spawn(const char *fname, const char *args);
 void process_wait(int pid);
 
+void graphics_set_mode(int mode);
+
 int sc_file_read(int fd, char *buffer, uint32_t size);
 int sc_file_write(int fd, char *buffer, uint32_t size);
 int sc_file_openat(int fd, char *buffer, uint32_t size);

@@ -0,0 +1,29 @@
+#include "common/cedos.h"
+#include "common/stdio.h"
+
+#include <stdint.h>
+
+void main(char *args) {
+    int mode = 0;
+    int i = 0;
+
+    while (args[i] != 0) {
+        char c = args[i];
+        if (c >= 'a' && c <= 'f') {
+            c -= 'a';
+        } else if (c >= 'A' && c <= 'F') {
+            c -= 'A';
+        } else if (c >= '0' && c <= '9') {
+            c -= '0';
+        } else {
+            printf("Character not recognized: %c\n", c);
+        }
+
+        mode <<= 4;
+        mode += (int)(c);
+        i++;
+    }
+
+    printf("Setting graphics mode %x...\n", mode);
+    graphics_set_mode(mode);
+}

@@ -0,0 +1,9 @@
+#include "cedos/drivers/graphics.h"
+
+#include <stdint.h>
+
+extern void realmode_int10h(uint32_t eax, uint32_t ebx, uint32_t ecx);
+
+int graphics_set_mode(int mode) {
+    realmode_int10h((uint32_t)(mode), 0, 0);
+}

@@ -5,6 +5,7 @@ realmode_int10h:
     push %ebp
     mov %esp, %ebp
 
+    pushf
     cli
     
     pusha
@@ -120,8 +121,7 @@ pop %eax
     mov %eax, %esp
 
     popa
-
-    sti
+    popf
     
     # return
     pop %ebp

@@ -26,7 +26,6 @@ #else
 #define PRINT_DBG(...) {}
 #endif
 
-extern void realmode_int10h(uint32_t eax, uint32_t ebx, uint32_t ecx);
 
 int os_init(void) {
     core_init();
@@ -67,12 +66,6 @@
     printk("Initializing root file system...");
     FAT_init();
     printk("done.");
-
-    while (1) {
-        graph[i++] = (i & 0x0F);
-
-        if (i > 320 * 240) { i = 0; }
-    }
 
 
     printk("Initialization finished.\n--------------\n");

@@ -2,6 +2,7 @@ #include "cedos/interrupts.h"
 #include "cedos/core.h"
 #include "cedos/sched/sched.h"
 #include "cedos/file.h"
+#include "cedos/drivers/graphics.h"
 
 void test(uint32_t ebx, uint32_t ecx, uint32_t edx) {
     printk("SYSCALL 0x01: EBX=%i ECX=%X EDX=%X\n", ebx, ecx, edx);
@@ -18,7 +19,8 @@ sched_yield,
         get_current_process,
         sched_spawn,
         sched_wait,
-        file_open
+        file_open,
+        graphics_set_mode
     };
 
 extern void syscall_interrupt(void);