IBM 3741 Data Station Reference Manual page 83

Transmit/Receive Mode Examples
Figure 40 shows the transmitting of one data set (the data
set identified by the data set label at 00008) and then the
receiving of one data set on the same diskette. (The
received data will be placed into the data set starting at
EOE
+
1 address for the data set defined by the data set
This data set is
tra'nsmitted.
_"'-'l'"T"r""'I
Disk Capacity
1898 Records
o
o
U.1
UJ
~~g§
19 Data Set Labels co \ /
Track 00, Sectors 08-26
~ ~§g
Label Address
Label Status
00008 00009
HDR1 HDR1
with
bypass
Beginning of Extent (BOE) 01001 03001 *
End of Data (EOD) 01020
03001 *
End of Extent (EOE) 01026 16026*
label at 00008.) I n this example, the operator inserts the
diskette and selects the transmit/receive communications
mode.
Note:
To receive data on disk 1, the data set label follow-
ing the last transmitted data set must have a B (bypass)
in position 41 in order to receive data.
When the transmit/receive mode switches to receive,
data will be received starting at EOE
+
1 address of
the previous data set.
---------~§§
*These extents will be modified to appropriate addresses by the communications program (the addresses generated
will depend on the amount of data received).
Disk Capacity
1898 Records
-----BEFORE RECEIVING DATA-----
w
§UlUl
o
UJ
00
co~cP
19 Data Set Labels , \
Track 00, Sectors 08-26
~ '§~~g
Label Address
Label Status
00008 00009
HDR1 HDR1
with
bypass
Beginning of Extent (BOE) 01001 02001 **
End of Data (EOD)
01020 ·17001 **
End of Extent (EOE) 01026 16026**
**Note the modified extent addresses.
-----AFTER RECEIVING DATA-----
Figure 40. Transmit/Receive Mode Example
Communications 77