ACC Programmer's Reference Guide

88 Chapter3
ZCOM Tables and Data Structures
Interface Table
for ports. It only keeps track of the enabled/disabled status for subchannels
via ipstat.
ZCOM_IPSTAT_TXB:
The out-of-transmit buffers bit.
For a non-4-port card, indicates the status of ports.
For a 4-port card, indicates the status of subchannels.
ZCOM_IPSTAT_TXBX:
The out-of-transmit-buffers (XPS queue) bit.
For a non-4-port card, indicates the status of ports.
For a 4-port card, indicates the status of subchannels.
The DAM maintains the port status to determine the usability of a
port/subchannel. A port/subchannel is operating normally if the status value
is zero. If it is out of transmit buffers , no new transmit data transfer will be
initiated. If the port/subchannel is disabled,down or undefined, t he DAM will
ignore all processing for this port.
IPCNTR - Terminal count per port/subchannel
This field contains the number of terminals defined on each
port/subchannel of this Mux interface card. It is initialized by TTGEN
based on the number of Term entries in the TTGEN configuration file
and is kept for informational purposes only.