testvbe.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <string.h>
   5 #include <errno.h>
   6 #include <time.h>
   7 #include <fcntl.h>
   8
   9 #include "v86.h"
  10 #include "testvbe.h"
  11
  12 #define reg16(reg) (reg & 0xffff)
  13 #define failed(tsk) (reg16(tsk.regs.eax) != 0x004f)
  14
  15 int main(int argc, char *argv[])
  16 {
  17         struct uvesafb_task tsk;
  18         struct vbe_ib ib;
  19         u16 *s;
  20         u8 *t;
  21
  22         if (v86_init())
  23                 return -1;
  24         tsk.regs.eax = 0x4f00;
  25         tsk.flags = TF_VBEIB;
  26         tsk.buf_len = sizeof(ib);
  27         strncpy((char*)&ib.vbe_signature, "VBE2", 4);
  28
  29         v86_task(&tsk, (u8*)&ib);
  30         if (failed(tsk)) {
  31                 fprintf(stderr, "Getting VBE Info Block failed with eax = %.4x\n",
  32                                 reg16(tsk.regs.eax));
  33                 return -1;
  34         }
  35
  36         t = (u8*)&ib;
  37
  38         printf("VBE Version:     %x.%.2x\n", ((ib.vbe_version & 0xf00) >> 8), (ib.vbe_version & 0xff));
  39         printf("OEM String:      %s\n", ib.oem_string_ptr + t);
  40         printf("OEM Vendor Name: %s\n", ib.oem_vendor_name_ptr + t);
  41         printf("OEM Prod. Name:  %s\n", ib.oem_product_name_ptr + t);
  42         printf("OEM Prod. Rev:   %s\n", ib.oem_product_rev_ptr + t);
  43
  44         printf("\n%-6s %-6s mode\n", "ID", "attr");
  45         printf("---------------------------\n");
  46
  47         for (s = t + ib.mode_list_ptr; *s != 0xffff; s++) {
  48                 struct vbe_mode_ib mib;
  49
  50                 tsk.regs.eax = 0x4f01;
  51                 tsk.regs.ecx = *s;
  52                 tsk.flags = TF_BUF_RET | TF_BUF_ESDI;
  53                 tsk.buf_len = sizeof(mib);
  54
  55                 v86_task(&tsk, (u8*)&mib);
  56                 if (failed(tsk)) {
  57                         fprintf(stderr, "Getting Mode Info Block for mode %.4x "
  58                                         "failed with eax = %.4x\n",     *s, reg16(tsk.regs.eax));
  59                         return -1;
  60                 }
  61
  62                 printf("%-6.4x %-6.4x %dx%d-%d\n", *s, mib.mode_attr,
  63                                 mib.x_res, mib.y_res, mib.bits_per_pixel);
  64         }
  65
  66         v86_cleanup();
  67
  68         return 0;
  69 }