B0_DAS
if (!(inp(ADDR(B0_DAS)) & DAS_AVAIL))
if (!(inp(ADDR(B0_DAS)) & DAS_BYP_ST))
outp(ADDR(B0_DAS),DAS_BYP_INS) ; /* insert station */
outp(ADDR(B0_DAS),DAS_BYP_RMV) ; /* bypass station */
return (inp(ADDR(B0_DAS)) & DAS_BYP_ST) ? TRUE : FALSE;