IBM System/360 Operating Guide

Re ad Inquiry
To send data from the 1050 to 2030:
1. Make sure that 1050 power is on and the CPU
connect switch is in the on position.
2. Press the request key.
3. Wait for the proceed light (on 1052) to turn on.
4. Make sure that the keyboard switch is in the
home or .Q!l position if you wish to enter data
from the 1052.
5. Make sure that the Reader-2 switch is in the
home or .£!l position if you wish to enter data
from a 1054 or 1056.
6. Enter data. You can enter data alternately from
the keyboard and reader (either paper tape or
card). Assume that you enter data from the 1052
first. Then press the home-reader start key to
enter data from the reader. The 1052 keyboard
is locked when the home-reader start key is
pressed.
7. Reading from the reader can be transferred
back to the keyboard by:
a. A reader stop code read in the card (or
paper tape).
b. Pressing the home-reader stop key on the
1052.
Note: The normal procedure is to use step" a"
so that text reading will not inadvertently be
stopped at the wrong point in the message.
.·8. The operation can be continued by entering
data from the 1052 (the keyboard is unlocked
when Reader 2 is stopped--step 7).
9. To stop the operation from the 1052:
a. Press and hold the alternate code key.
b. Press the 1052- 5-key (EOB) or the 6-key
(EOT).
IBM 1050 OPERATIONS
10.
To stop the operation from Reader 2:
a. The EOB (or EOT) character is read (after
the last data character is read) from tape,
or
b. The EOB (or EOT) character is read from
the card or the trailing edge of the card
feeds far enough to generate the stop.
11. At the end of the operation, the proceed light
turns off. The keyboard is locked and an
automatic carrier return and line feed is
attempted to any 1050 printer copying the
input.
Note
that 1050 operations with the 2030 are under
control of the program. That is, the preceding
operations can be accomplished only if the program
controlling the 2030 is written to recognize requests
from the 1050 devices.
The operation can also be stopped by the channel.
This stop occurs when the CCW (Channel Command
Word) byte count goes to zero. If data was being
entered from the 1052, the proceed light is turned
off, the keyboard is locked, an automatic carrier
return and line feed is initiated to any 1050 printer
copying the input, and a hold condition is placed on
Reader 2.
If the ,data was being read from Reader 2, the
attachment remains busy until EOB is detected. No
more data characters are then transferred to storage.
If the count was N, and data is from the keyboard,
the N + 1 character prints (if a printable character)
but is not transferred to storage. If data was being
entered from Reader 2, all printable characters up
to EOB/EOTprint (unless the printers are deselected
or in the bypass mode).
At EO B, the proceed light is turned off. The
keyboard remains locked. A hold condition is placed
on Reader 2. An automatic carrier return and line
feed is initiated to any 1050 printer copying the
input.
Cancel Operation
A cancel operation can be initiated from the key-
board during a re ad inquiry at any time after the
proceed light comes on, provided the keyboard still
has control (the reader start key has not been pressed).
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IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English