VIDTCON2_LINEVAL
val = VIDTCON2_LINEVAL(m->vdisplay / 2 - 1) |
val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
data = VIDTCON2_LINEVAL(vmode->yres - 1) |