gpx_wait
gpx_wait(ss, RASTEROP_COMPLETE);
gpx_wait(ss, TX_READY);
gpx_wait(ss, RASTEROP_COMPLETE);
gpx_wait(ss, RASTEROP_COMPLETE);
gpx_wait(ss, FRAME_SYNC);
static int gpx_wait(struct gpx_screen *, int);
gpx_wait(ss, RASTEROP_COMPLETE);
if (gpx_wait(ss, ADDRESS_COMPLETE) == 0 &&
gpx_wait(ss, TX_READY) == 0) {
if (gpx_wait(ss, FRAME_SYNC) != 0) {
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, ADDRESS_COMPLETE);
gpx_wait(ss, FRAME_SYNC); /* wait at LEAST 1 full frame */
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, ADDRESS_COMPLETE);
gpx_wait(ss, FRAME_SYNC); /* wait at LEAST 1 full frame */
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);
gpx_wait(ss, FRAME_SYNC);