Systems Reference Library - All about the IBM 1130 Computing ...

1442 DSW Interrupt IndicatorsFigure 72 shows the format of the DSW and definesinterrupt and program resettable indicators.OPERATION COMPLETE: This indicator turns on,causing an interrupt, after completion of a read orfeed operation. The interrupt occurs 20.6 ms aftercolumn 80 has passed the read station in a model 6,or 15.4 ms after column 80 has passed the read stationin a model 7.Operation complete also turns on after the lastcolumn to be punched has been punched and checked,and the punch drive has stopped. This occurs 12.5ms after the last column punched on a model 6, or6.25 ms after the last column punched on a model 7.Operation complete also turns on if an XIO isgiven after operation complete for a previous operationis given, but before one of the following errorsis detected: transport, hopper misfeed, feed checkat punch station, or feed clutch.1442 DSW Noninterrupt IndicatorsFigure 72 shows the format of DSW indicators anddefines noninterrupt and program resettable indicators.ANY ERROR: This indicator turns on if one or moreof the following error conditions exist:1. Parity error.2. Storage protect violation.3. Feed check at read station.4. Overrun.5. Read registration check.6. Punch check.7. Hopper misfeed.8. Transport.9. Feed check at punch station.10. Feed clutch.Error conditions 7 through 10 of the precedinglist are not turned on until after operation completeis on, unless the operation was an XIO initialize writerequiring an automatic feed cycle. If another operationis initiated before these error indicators areturned on, an operation complete interrupt is forced,and no reading or punching takes place.LAST CARD: This indicator shows that column 80 ofthe last card has passed the read station and that thehopper and read station are empty.PARITY ERROR: This indicator turns on if a transferto or from core storage has resulted in a wordnot having correct (odd) parity. A parity error doesnot remove the 1442 from ready status.STORAGE PROTECT VIOLATION: This indicatorturns on if the 1442 attempts to read into a storageprotectedcore storage location. A storage protectviolation does not remove the 1442 from ready status.FEED CHECK AT READ STATION: When on, thisindicator means that a card is improperly positionedat the read station.CE BUSY: When the 1442 is in CE mode, this indicatoris used in place of the busy indicator.CE NOT READY: When the 1442 is in CE mode, thisindicator is used in place of the not ready indicator.BUSY: When on, this indicator means that a read,punch, or card feed operation is in progress and thatthe 1442 cannot accept another XIO initialize read,XIO initialize write, or XIO control. If one of thesecommands is given while busy is on, it is treated asa no-op. Whenever busy is on, not ready is also on.NOT READY: When off, this indicator shows that the1442 is in ready status, is not in CE mode, and is notbusy. The 1442 is in ready status if all of the followingconditions exist:1. Power is on.2. A card is registered at the read station or alast-card sequence is in progress.3. Cards are in the hopper or last-card sequence isin progress.4. Stacker is not full.5. Check light is off.6. START has been pressed after manual stop.7. Chip box is not full and not removed.If an XIO initialize read, XIO initialize write orXIO control is given while the 1442 is not ready orbusy, it performs as a no-op.READ AND PUNCH OPERATIONSBefore any operation can begin, the 1442 must beplaced in ready status. With power on and cards inthe hopper, pressing START causes the bottom cardin the hopper to be fed into the read area (run in)and places the 1442 in ready status.150