crt_outb
crt_outb(par, 0x11, crt_inb(par, 0x11) & 0x7f); /* CRT unprotect */
crt_outb(par, i, reg->crt[i]);
crt_outb(par, 0x1a, reg->ext[0]);
crt_outb(par, 0x1b, reg->ext[1]);