SST_2D_GO
voodoo3_write32(sc, COMMAND_2D, blitcmd | SST_2D_GO);
(ROP_COPY << 24) | SST_2D_GO);
| (ROP_COPY << 24) | SST_2D_GO);
(ROP_COPY << 24) | SST_2D_GO);
(ROP_COPY << 24) | SST_2D_GO);