User`s guide

Contents cxlix
VERS: The value given in VERS is used to indicate the version of PCLK installed in the terminal at
the time the query reply is returned. For example, 0x0001 indicates PCLK version 1.1.
See the IBM 3270 Information Display System Data Stream Programmer’s Reference for the field
definitions for this query reply.
Base DDM Query Reply Formats
The following query reply formats are examples of some of the Base + SDP combinations possible. Not
all of the combinations are shown.
Table D-4. Base DDM Query Reply Format with Name and Direct Access SDPs
Offset Length Content Meaning
0 1 word Length Length of structure (includes SDPs)
2 1 byte 0x81 Query Reply ID
3 1 byte 0x95 Query Reply Type
4-5 2 bytes FLAGS Reserved
6-7 2 bytes LIMIN Maximum DDM bytes allowed in
inbound transmission
8-9 2 bytes LIMOUT Maximum DDM bytes allowed in
outbound transmission
10 1 byte NSS Number of subsets supported
11 1 byte DDMSS DDM subset identifier
12 1 byte Length
(n+2)
Parameter Length
13 1 byte 0x02 DDM Application Name