Table of Contents
Advertisement
Overrun
(read operation) indicates that data was lost be-
cause the data channel failed to transfer data to main
storage within the time the 1442 required service.
Error Indications: OVERRUN and CHECK.
Card Positions Mter Error: Shown at left.
Procedure: 1.
When program hal ts, 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.
Overrun
(punch operation) indicates that data was lost be-
cause the data channel failed to transfer data from main
storage within the time the 1442 required service.
Error indication: OVERRUN and CHECK.
Card Positions Mter Error: Shown at left.
Procedure: 1.
When program halts, empty hopper
and press NPRO to eject cards 1 and 2.
2.
If necessary, reconstruct card 1 to pre-
punched state.
3.
Place reconstructed card 1 and card 2 in
front of card 3 and return deck to hopper.
4.
Press START to ready 1442.
Parity
(read operation) indicates incorrect (even) parity
detected on data transfer to 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.
Place cards 1 and 2 in front of card 3 and
return deck to hopper.
3.
Press START to ready 1442.
IBM 1442 Card Read Punch
3S
Advertisement
Table of Contents
