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b. Negative-Standard response is sent (r
2
=Area Station
address) when the designated Area Station fails to by-
pass, or if the Area Station is not defined.
CE panel request:
a. Positive-Standard response.
b. Negative-Cat. No. X'OOOS' is contained in the
Display Reg.
X'C2'-Restore Area Station
• Function-Causes a 2790 Restore command to be issued
to designated Area Station, causingit to go on-line.
• Request Format
S/360-Standard format with d
1
containing the Area
Station address.
CE Panel-Standard format with Area Station address
entered in positions 8-1 S of the Data/ Address switches.
• Response Format
S/360 request:
a. Positive-Standard response with r
2
containing the
Area Station address.
b. Negative-Standard response is sent (r
2
=AS address)
when the designated AS fails to restore.
CE panel request:
a. Positive-Standard response.
b. Negative-Cat. No. X'0006' is contained in the display
register.
X'C3'-Bypass Segment
• Function-Causes the designated segment to be bypassed.
The steps in accomplishing this are:
a. If the 2790 input is active, the actions of the 'stop
2790 input' {X'C6') are performed (record stop,
timeout, and aborting of transactions). No X'C6'
response is generated.
b. The designated segment is bypassed.
c. A X'C3' response is sent to S/360 unconditionally
(unless an invalid panel request)
• Request Format
S/360 and Panel-Standard format with r
2
=designated
segment in EBCDIC.
• Response Format
See "General Responses."
46
X'C4'-Restore Segment
• Function-Causes the loop to stop momentarily and
the designated segment to be restored to operation. The
steps are:
a. If the 2790 input is active, the loop is brought to a
record stop and an eight-second timeout is performed.
b. The designated segment is restored.
c. The loop is returned to its original state and a response
message sent to the S/360.
• Request Format
S/360 and CE Panel-Standard format with r
2
=designated
segment {EBCDIC) to be restored.
• Response Format
See "General Responses."
X'C5'-Set 'Read Deferred Data Mode'
• Function-Causes the 271 S to read deferred data from
2715 disk storage and to send it to S/360. The sending
of the deferred data has lower priority than priority data
residing in core storage and on 271 S disk. The resetting
of this mode may be done in two ways:
a. 'Reset read deferred data mode' control request.
b. The mode will be automatically reset 'when the 2790
input has been stopped, and there is no priority or
deferred data in the 271 S, either on disk or in core.
• Request Format
S/360-Standard format.
• Response Format
a. Positive-No response is generated as a direct result of
executing this control request. However, when the
'read deferred data mode' is reset automatically, a
standard positive response to the X'CS' control request
is generated, with:
r
2
=Binary buffer element count of data remaining
on the 2740 Output queues.
r
3
=Buffer element count of data remaining on the
2790 output queues.
X'C6' -Stop 2790 Input
• Function-Stops the 2790 input. The steps in bringing
the 2790 input to an orderly stop are:
a. A 2790 transactions stop (that is, no new transactions
started) is performed and a timeout is done to allow
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