User`s guide

Contents cli
The SDPs begin at offsets 12 and 16.
See the IBM 3270 Information Display System Data Stream Programmer’s Reference for the field
definitions for this query reply.
The IBM Auxiliary Device Query Reply
The Auxiliary Device Query Reply is used to indicate to the host application the support of an IBM
auxiliary device, which uses a data stream defined by IBM. See the IBM 3270 Data Stream
Programmer’s Reference Manual for more information.
When the function is supported, the query reply is transmitted inbound in reply to a Read Partition
structured field specifying Query or Query List (QCODE List = 0x9E, Equivalent, or All).
When a workstation supports multiple auxiliary devices, the IBM Auxiliary Device Query Reply must
be sent for each of the devices.
Optional Parameters: All parameters shown in the base part of the query reply must be present.
Parameters not used are set to 0x100. At least one self-defining parameter must be present.
Table D-6. IBM Auxiliary Device Base Format with Direct Access SDP
Offset Length Content Meaning
0 1 word Length Length of structure
(includes SDPs)
2 1 byte 0x81 Query Reply ID
3 1 byte 0x9E IBM Auxiliary
Device Query Reply
4 1 byte Bit 0
Bits 1-7 FLAGS QUERY Binary 1
RES Reserved Read Part (Query,
Query List)
IBM Auxiliary
device supports
Query
Reserved, must be
binary 0’s
5 1 byte 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 TYPE
Table D-6. IBM Auxiliary Device Base Format with Direct Access SDP (continued)
Offset Length Content Meaning
0x01 0x02 Others Type of auxiliary
device supported
IBM auxiliary
device display
IBM auxiliary
device printer
Reserved 11
1 byte 0x04 Parameter Length 12