INT E0 - DR Multiuser DOS - "A_ATTACH" - ATTACH AUX DEVICE CL = A5h Return: nothing (DR) AX = status (REAL/32) Desc: attaches the default auxiliary device to the calling process unless it is already attached to another process, in which case the call blocks until the device becomes available Notes: this call should be used before attempting to read or write from the AUX device; however, the I/O calls internally call this function to ensure device ownership also supported by REAL/32 SeeAlso: INT E0/CL=03h,INT E0/CL=04h,INT E0/CL=A6h,INT E0/CL=A7h,INT E0/CL=A8h SeeAlso: INT E0/CL=ACh,INT E0/CL=ADh,INT E0/CL=B0h