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testvbe.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <fcntl.h>

#include "v86.h"
#include "testvbe.h"

#define reg16(reg) (reg & 0xffff)
#define failed(tsk) (reg16(tsk.regs.eax) != 0x004f)

int main(int argc, char *argv[])
{
      struct uvesafb_task tsk;
      struct vbe_ib ib;
      u16 *s;
      u8 *t;

      if (v86_init())
            return -1;

      memset(&tsk, 0, sizeof(tsk));
      tsk.regs.eax = 0x4f00;
      tsk.flags = TF_VBEIB;
      tsk.buf_len = sizeof(ib);
      strncpy((char*)&ib.vbe_signature, "VBE2", 4);

      if (v86_task(&tsk, (u8*)&ib))
            return -1;

      if (failed(tsk)) {
            fprintf(stderr, "Getting VBE Info Block failed with eax = %.4x\n",
                        reg16(tsk.regs.eax));
            return -1;
      }

      t = (u8*)&ib;

      printf("VBE Version:     %x.%.2x\n", ((ib.vbe_version & 0xf00) >> 8), (ib.vbe_version & 0xff));
      printf("OEM String:      %s\n", ib.oem_string_ptr + t);
      printf("OEM Vendor Name: %s\n", ib.oem_vendor_name_ptr + t);
      printf("OEM Prod. Name:  %s\n", ib.oem_product_name_ptr + t);
      printf("OEM Prod. Rev:   %s\n", ib.oem_product_rev_ptr + t);

      printf("\n%-6s %-6s mode\n", "ID", "attr");
      printf("---------------------------\n");

      for (s = t + ib.mode_list_ptr; *s != 0xffff; s++) {
            struct vbe_mode_ib mib;

            memset(&tsk, 0, sizeof(tsk));
            tsk.regs.eax = 0x4f01;
            tsk.regs.ecx = *s;
            tsk.flags = TF_BUF_RET | TF_BUF_ESDI;
            tsk.buf_len = sizeof(mib);

            if (v86_task(&tsk, (u8*)&mib))
                  return -1;

            if (failed(tsk)) {
                  fprintf(stderr, "Getting Mode Info Block for mode %.4x "
                              "failed with eax = %.4x\n",   *s, reg16(tsk.regs.eax));
                  return -1;
            }

            printf("%-6.4x %-6.4x %dx%d-%d\n", *s, mib.mode_attr,
                        mib.x_res, mib.y_res, mib.bits_per_pixel);
      }

      v86_cleanup();

      return 0;
}

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