Function vga_FontPtrs

sys/msdos/vidvga.c:903–916

* * Returns a far pointer (or flat 32 bit pointer under djgpp) to the * location of the appropriate ROM font for the _current_ video mode * (so you must place the card into the desired video mode before * calling this function). * * This function takes advantage of the video BIOS loading the * address of the appropriate character definition table for * the current graphics mode into interr

 * the current graphics mode into interrupt vector 0x43 (0000:010C).
 */
char __far *
vga_FontPtrs(void)
{
    USHORT __far *tmp;
    char __far *retval;
    USHORT fseg, foff;
    tmp = (USHORT __far *) MK_PTR(((USHORT) FONT_PTR_SEGMENT),
                                  ((USHORT) FONT_PTR_OFFSET));
    foff = READ_ABSOLUTE_WORD(tmp);
    ++tmp;
    fseg = READ_ABSOLUTE_WORD(tmp);
    retval = (char __far *) MK_PTR(fseg, foff);
    return retval;
}

/*
 * This will verify the existence of a VGA adapter on the machine.