CMD_SEL          1035 dev/isa/seagate.c 	    (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL;
CMD_SEL          1037 dev/isa/seagate.c 	    (BASE_CMD & ~CMD_INTR) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN;