Table of Contents
Advertisement
compare equally.
The
Read STA (Station) Light.
when on, indicates that a
card was not properly positioned (feed check) at the read
sta tioll.
The
Punch Light
turns on when a punch check occurs due
to failure of the punch echo data and punch character to
compare equally. Punching into prepunched columns
does not cause a punch check.
The
Punch STA (Station) Light,
when on, indicates that a
card was not properly positioned (feed check) at the punch
station.
The
Overrun Light
turns on when data overrun occurs.
That is, data was lost because the data channel failed to
transfer data to or from main storage within the time the
1442 required service.
The
TRANS (Transport) Light,
when on, indicates that a
card is out of position in the card transport area between
the punch station and stackers.
Thp Start Ke.v is llsed to perform the following functions:
1.
To start initial card run-in. The bottom card in the
hopper moves to the read area and ready sta tus is
restored to the 1442.
2.
To restore ready status after manually stopping the
1442.
3.
To initiate a last card sequence.
The
Stop Key
removes the 1442 from ready status when
it is pressed. If a 1442 operation is in progress, it is neces-
sary to hold STOP down until the operation is complete;
otherwise the 1442 will not recognize that STOP has been
pressed.
The
NPRO (Nonprocess Runout) Key
is used to eject cards
from the serial path without processing them. Pressing
NPRO also resets the eight error conditions. This key is
effective only if the hopper is empty. During card opera-
tions, NPRO should not be held down at the time the hop-
per goes empty, as the signal to the program indica ting that
the operation is complete for the last card processed will
not be given.
READYING THE 1442
1.
With system power on, press NPRO to clear any
error condition and eject any cards left in card path.
2.
3.
Place cards face down in hopper, 9-edge first.
Press START. When ready light comes on, 1442 is
in ready status.
INITIATING LAST CARD SEQUENCE
When the hopper goes empty during a feed cycle, the 1442
is removed from ready status. This signals the program that
operator intervention is required.
Processing may be continued by loading more cards into
the hopper and pressing START. A last card sequence may
be initiated by pressing START without loading more cards
30
IBM 1800 Operating Procedures
in the hopper.
The last card sequence places the 1442 in ready status
and allows two more feed cycles to be taken. The last two
feed cycles allow processing of the last card and ejects it
into the stacker. The program is also signalled that the last
card has been processed.
I
Advertisement
Table of Contents
