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36
IBM 1800 Operating
Procedures
Parity
(punch operation) indicates
incorrect (even) parity
detected on
data transfer
from
processor-controller.
Error
Indication
:
No 1442
error
lights will be on.
Card Positions After Error: Shown at left
.
Procedure: 1.
When program halts,
empty
hopper and
press NPRO to eject cards 1
and
2.
2.
If necessary, correct
card
1 to pre-
punched
state.
3.
Place
corrected
card 1
and
card 2 in
front of
card 3
and
return deck to hopper.
4.
Press START to ready 1442.
Storage
Protect
indicates attempt to
read
a column into a
sto
rage-protected
location.
Error
Indication: No 1442
error
lights will be
on.
Card
Positions After
Error:
Shown
at
left.
Procedure:
1.
When program halts, empty hopper
and
press
NPRO
to
eject cards
1
and 2.
2.
Place
cards 1 and 2 in front of card 3 and
return deck
to hopper.
3
.
Press START to ready 1442
.
Chip Box
indicates
that
chip
box is
full or
has been removed
from the machine
.
Error
lndication
:
CHIP
BOX.
Procedure
:
l.
Open
front
left door (A)
of
1442.
2.
Using handle (B),
pull box
from
unit
an
d
empty.
3.
Replace box
and
close door.
4.
Press START to return 1442
to
ready
status.
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