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Reading is done serially by column, beginning with
column one. Cards to be read by a 1056 must have a
standard upper-left corner cut (C-1). Cards without
this cut cannot feed properly.
The card reader only operates when a card is at the
read station. The operator controls the reader with
the reader start-home button, reader start-line button,
stop switch, feed button, and the eject button. When
operating with a printer, the reader is interrupted by
tab, CR/LF, and line feed. The reader is also inter-
rupted by operation of the reader stop switch, or by
the end of the last card. The trailing edge of each card
causes the EOB code to be generated automatically,
unless the Auto EOB switch (1056) is off.
The program-duplicate switch, located on the 1052
switch console, selects the reader's mode of operation
in the home-loop. In the program mode, a number of
functions can be performed. In the duplicate mode, the
reader reads all characters, but is not controlled by
prefix codes or the reader stop code.
1056 Card Reader - Special Features
All 1056 special features considered pertinent are sum-
marized in this section. The Principles of Operation
section contains a detailed description of these features.
Card Reader Program. This feature provides a 12-track
paper tape and the associated reading mechanism
located within the 1056. This tape can be punched
with function codes and data, and is read alter-
nately with the card, column for column. Thus, the
number of columns of information available from
each card is effectively doubled with this feature.
51-column Card Feed (1056 Model 2 only). Provides
for the feeding of 51-column cards interspersed with
80-column cards.
Extended Character Reading (1056 Model 1 only).
With this feature, the 1056 can read the PTT code/6
basic and extended card codes and translate them
to BCD codes.
Short Card Pack Feed (1056 Model 1 only). Provides
for the feeding of 22-, 51-, or 80-column cards from
a pack of up to 300 cards. Cards of different lengths
cannot be interspersed in the pack.
1057/1058
Card
Punch
The flexibility of the
IBM
1050 system is further in-
creased with the addition of a 1057 card punch or a
1058 printing card punch (Figure 12). One or two card
16
1050 General Information
Figure 12.
IBM
1058 Printing Card Punch
punches can be used in the system. The addition of a
card punch to a system makes possible the direct card
punching (and printing) of data received. The punch
operates from either the line-loop data channel, the
home-loop data channel or it can be used independ-
ently as a keypunch.
The punch is similar in appearance and operation
to the standard
IBM
keypunch. 80-column cards are
punched at a maximum rate of 14.8 columns per sec-
ond when the 1057 /1058 is used in the 1050 system.
Normal keying speeds are attained when operating as
a keypunch. Skipping is accomplished at 80 cps, in all
cases.
Alternate program is standard for this unit.
1057 /1058 Card Punch - Special Features
The following pertinent special features for the 1057
I
1058 are summarized here but are described in detail
in the Principles of Operation section.
Extended Character Punching (1057 only). With this
feature, the 1057 translates upshift and downshift
characters into unique card codes and punches them.
Operator Panel. This panel is accessible to the operator
and permits individual wiring and control of the
various function codes.
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