WMRR
out_8(fb_regs + WMRR, rr);
out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_SET : RR_INVERT));
out_8(fb_regs + WMRR, (region->rop == ROP_COPY ? RR_CLEAR : RR_NOOP));