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0835 Negative Response:
An invalid parameter was contained in the host request.
Two bytes of user sense data are included in the response indicating the byte in the
request that caused the rejection. If more than 1 byte is not valid, only the position
of the first byte that is determined to be invalid is returned.
The response has the form 0835 OOXX, where XX is the position of the byte in the
request that caused the rejection by the 3708. Note that XX varies depending on the
inclusion of optional subvectors within the RU.
.
Only certain checks are performed by the 3708. Others are considered "sender"
checks, and indeterminate results occur if they are received. See "Host Request and
3708 Response Formats" for the bytes that are checked by the 3708.
Host Request and 3708 Response Formats
This section contains the SNA transmission header (TH)/request header
(RH)/request unit (RU) formats for the host request and the solicited and unsolicited
3708 responses.
Host Request Format
The basic format of the host request is:
TH
RH
RU
RTM Header
Length to Bnd of RU
RTM Request Control Vector
SNA Address List (if required)
Target LU (ifrequired)
RTM Request Vector
RTM Control Vector (optional).
Table 8-3 shows the
TH~
RH, and RU definitions for the host request format.
Table 8-3 (Page 1 of 4). TH, RH, and RU Definitions for the Host Request
Byte
Bit
Value
Meaoing
THO
0-3
b'OOIO'
FID
4-5
b'--'
MPF (segment)
6
b'O'
Reserved
7
b'O'
BFI
THI
-
X'OO'
TH2
X'OO'
DAF'
TH3
X'OO'
OAF'
TH4,5
X'OOOQ'
SNF
RHO
0
b'O'
Request
1-2
b'OO'
FMD
3
b'O'
Reserved
4
b'l'
Format indicator
5
b'O'
Sense data included
6-7
b'll'
Chain state indicator
8-24
IBM 3708 Description
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