Reference Guide

ZCOM Tables and Data Structures
Message Header
Chapter 3 115
MSRESP- Response code
The response code is used in two ways. Firstly, for message types 2, 4, 10,
and 12 (send message), it indicates the type of response expected when
this message is sent or delivered. Secondly, for other message types, it is
the status of the completed message.
Response code for message type 2 and 10 are shown in Table 3-36.
Response code for all other message types are shown in Table 3-37.
MZDEST - Destination ZCOM address
This is the ZCOM address to which the message is to be sent.
MZSRCE - Source ZCOM address
This is the ZCOM address of the sender of the message. This field is
returned in the message header with the zread routine. When a message
is received from a terminal, the sender zaddr.zlu is the ZLU number of
the terminal.
Table 3-36 Response code for message type 2 and 10 Format
7 6 5 4 3 2 1 0
LPR XPS PGW BFR DEF ERR
ERR Response if error exists
DEF Definite response (error or no error)
BFR Return status and message buffer as response (for data
message only)
PGW Program is waiting for response
XPS Express transmit message
LPR Low priority transmit message
Table 3-37 Response code for all other message types
7 6 5 4 3 2 1 0
ZCOM error code or 0