Line Termination And Error Conditions; Termination Of Data Call - IBM 3742 Reference Manual

Disk Capacity
- - - - - Key Entry Programs
Key Entry Job #1
Key Entry Job
#2
1898 Records
~~~~~~~~~~~~~~~==============================~
19 Labels; Track 00
Sectors 08-+-26
Label Address
Label Status
Beginning of Extent (BOE)
End of Data (EOD)
End of Extent (EOE)
w
o
IlJ
00008
. Bypass
01001
01020
01026
00009 00010
HDRl HDRl
03001 18001
14017 30008
16026 32026
00011 00012 00013 00026
Bypass Bypass Deleted Deleted
01001 01001 74001 74001
-
01001 01001 74001 74001
73026 73026 73026 73026
Figure 30. BSe Transmit/Receive Example (Before Teleprocessing Initiated)
Figure 31 illustrates the status of the disk after the transmit!
receive mode teleprocessing function was completed. Note
that key entry programs (for example) may be stored on
the disk without being affected by teleprocessing.
LINE TERMINATION AND ERROR CONDITIONS
Termination of the Data Call
On switched lines, a data call is terminated when a discon-
nect sequence is received, when a disconnect timeout occurs,
or when RESET is pressed. Pressing RESET takes the 3741
out of a communications mode of operation. The end of
58
data and end of extent are updated (see Figure 29) under
the following conditions:
• If a disconnect sequence is received and either:
1. The mode is R, RC, BT, BC, DT, or DC.
2. The mode is RJ, BJ, or DJ; and a disk full error
has occurred.
• If a disconnect timeout has occurred and either:
1.
2.
The mode is R, RC, BT, BC, DT, or DC.
The mode is RJ, BJ, or DJ; and a disk full error
has occurred.