subcommand        283 dev/isa/mcd.c  	mbx.cmd.data.config.subcommand = MCD_CF_IRQENABLE;
subcommand       1363 dev/isa/mcd.c  	mbx.cmd.data.config.subcommand = MCD_CF_READUPC;
subcommand        222 dev/isa/mcdreg.h 			u_char	subcommand;