ACC Programmer's Reference Guide

72 Chapter3

ZCOM Tables and Data Structures

Physical Terminal Tables

The IN bit indicates whether the terminal is considered as part of the

current configuration. It is initialized by TTGEN and maintained by the

driver. The EN and AC bits represent the current status of the terminal.

They are initialized by TTGEN and maintained by the driver. They are

reflected in the opposite sense by DS and IA on the interface card and in

PTFWST.

When the ZCOM subsystem starts up, the driver sets the AV bit if the

terminal is successfully initialized.

PTFWST - Firmware terminal s tatus

This word contains the TMSTAT and TMSTT2 bytes from the Mux (via

$STDT buffer)

Figure 3-5 Firmware terminal status PTFWST

The status in bits 7-0 is copied from the $STDT buffer. These bits

represent the field TMSTT2 from the i nterface terminal table.

PTTYPE -Terminaltype(physical)

Protocol module terminal type. It is initially setup by TTGEN in the

memory image file but is subsequently maintainable.

SCFG_LEN - Length of the special protocol configuration bytes.

This field contains the length of any protocol specific configuration data

contained in the spec_cfg[] field.

SPEC_CFG - Special protocol configuration data

This field contains any protocol specific configuration data that might be

needed. The details on its contents and how to configure this field is

documented in the protocol manuals.

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DS SP

DS -

SP -

Terminal is disabled

Terminal is on slow poll list

IA -

Terminal is inactive (no poll)

GP - Terminal is group polled

GP DN GA GM

DN - Terminal is down

DC - Terminal downcounter expired

GA - Group poll active

GM - Group poll master