Card Punch; Printer - IBM 709 General Information Manual

Card Punch
The
IBM
721 Card Punch (Figure 90) is used as the
punching or recording unit for
IBM
cards. The 721
punches cards at a rate of 100 cards per minute.
Basic card punch operations are analogous to those
of the card reader, except that instead of building up
a card image in core storage when data are read from
a card, the card image is sent from core storage to the
card punch to be recorded as punched holes (Fig-
ure 91). The stored program and the control panel on
the card punch control the coding and the recording
format of the card image.
The
IBM
709 Data Processing System may have one
card punch attached to data channels A, C, and E.
If
a card punch is attached to a data channel, that chan-
nel must also have an
IBM
716 Printer attached to it.
One printer will accommodate both the reader and
punch.
The
IBM
7090 Data Processing System may have
one card punch attached to each data channel making
a total of eight possible card punches per system. One
printer is required for each card reader and card
punch.
Printer
The
IBM
716 Printer (Figure 92) is used to prepare
printed output from the computer systems.
The printer is equipped with 120 rotary type wheels
(Figure 93). Each type wheel has 48 characters in-
------------
with
a
"0"
zone
zone
"7" hole
by itself
with a "12"
zone
"12" hole
"11" hole
b"O"
hale
6
~
~
"7" holes
----
- - -
Character Printed
Card Punch
Figure 9l. Punching a Card Image
Figure 92.
IBM
716 Printer
---
W
5
E
8 l R
I/L 1/;
... I
"
,
I
A' A' .Y vVVVJ
'A'..vv'vvv
fVI/
v'v
Core Storage
o
Zone Porti on
T 2 B
Figure 93.
IBM
716 Printer Type Wheel
Input-Output Components 41