apc_writeb
apc_writeb(inarg & APC_REGMASK, APC_FANCTL_REG);
apc_writeb(inarg & APC_REGMASK, APC_CPOWER_REG);
apc_writeb(inarg & APC_BPMASK, APC_BPORT_REG);
apc_writeb(apc_readb(APC_IDLE_REG) | APC_IDLE_ON, APC_IDLE_REG);