KernelLand/Modules/Display/VGA/vgaregs.c

   1 /*
   2  * Acess2 VGA Driver
   3  * - By John Hodge (thePowersGang)
   4  */
   5
   6
   7 // === CODE ===
   8 void VGA_WriteAttr(Uint8 Index, Uint8 Data)
   9 {
  10         Index &= 0x1F;
  11         SHORTLOCK(&glVGA_Attr);
  12         inb(0x3DA);
  13         outb(0x3C0, Index);
  14         outb(0x3C0, Data);
  15         SHORTREL(&glVGA_Attr);
  16 }
  17
  18 Uint8 VGA_ReadAttr(Uint8 Index)
  19 {
  20         Uint8   ret;
  21         SHORTLOCK(&glVGA_Attr);
  22         inb(0x3DA);
  23         outb(0x3C0, Index);
  24         ret = inb(0x3C1);
  25         SHORTREL(&glVGA_Attr);
  26         return ret;
  27 }
  28
  29 void VGA_WriteSeq(Uint8 Index, Uint8 Data)
  30 {
  31         outb(0x3C4, Index);
  32         outb(0x3C5, Data);
  33 }
  34 Uint8 VGA_ReadSeq(Uint8 Index)
  35 {
  36         outb(0x3C4, Index);
  37         return inb(0x3C5);
  38 }
  39 void VGA_WriteGraph(Uint8 Index, Uint8 Data)
  40 {
  41         outb(0x3CE, Index);
  42         outb(0x3CF, Data);
  43 }
  44 Uint8 VGA_ReadGraph(Uint8 Index)
  45 {
  46         outb(0x3CE, Index);
  47         return inb(0x3CF);
  48 }
  49
  50 void VGA_WriteMiscOut(Uint8 Data)
  51 {
  52         outb(0x3C2, Data);
  53 }
  54 Uint8 VGA_ReadMiscOut(void)
  55 {
  56         return inb(0x3CC);
  57 }