INT E0 - REAL/32 - "L_CATTACH" - CONDITIONALLY ATTACH TO DEFAULT LIST DEVICE CL = A1h Return: AX = status (00h = successful, FFh = unable to attach) may destroy SI,DI Desc: attach the default list device to the calling process only if it is currently available SeeAlso: INT E0/CL=92h,INT E0/CL=9Eh,INT E0/CL=A0h