VGAINIT1
tdfx_outl(par, VGAINIT1, reg->vgainit1 & 0x001FFFFF);
tdfx_outl(par, VGAINIT1, reg->vgainit1);
reg.vgainit1 = tdfx_inl(par, VGAINIT1) & 0x1fffff;