ZCOM Tables and Data Structures
Physical Terminal Tables
PTZLU - Owning terminal ZLU number
PTZCS - Owning terminal ZLU checksum
The terminal ZLU number points back to the ZLU table entry for the owner of the terminal. The ZLU contains the checksum for the ZLU as well as its number. It is used by the driver to derive the source ZLU for all messages received for this physical terminal. This parameter is initially setup by TTGEN in the memory image file. These fields are maintained by the ZCOM subsystem when ZLU and terminal linkage are modified.
PTMUX - Mux number of terminal
The Mux interface number of the terminal. This is set initially through the TTGEN configuration file and is subsequently maintainable.
PTPORT - Terminal port number
The port number of the terminal on the Mux interface. This is set initially through the TTGEN configuration file and is subsequently maintainable.
PTTERM - Terminal number within port
The terminal number on the Mux interface card within the port. This is set initially through the TTGEN configuration file and is subsequently maintainable. This field has been replaced by the ptmx_term field. It remains valid for
PTMX_TERM - Terminal number within port or card
This field contains the firmware terminal number this terminal ZLU is associated with. The firmware manages terminals using a terminal number while the ZCOM subsystem manages terminals using ZLUs on the host. On
SUBCH - Subchannel number within port
This field contains the subchannel this terminal ZLU is configured on. If the card does not support subchannels, this field is set to zero.
PTZPRCVR - ZCOM address of primary receiver
Node number, ZLU, and checksum used as the destination address for normal messages and unsolicited status messages received for this physical terminal. This field is set by the zset_rcvr call (mode 0 or mode 1 if multiplexed terminal).
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