RCA 301 Programmer's Reference Manual
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PERIPHERAL EQUIPMENT| | —FUNCTIONAL DESCRIPTIONCARD EQUIPMENTThe punched card equipment includes the Card Reader, Models 323, 324, and 329, two models of Card Punchesand the Card Reader-Punch.The Card Reader, Model 323, will either: (1) automatically convert 80-column Hollerith card code to RCA 301characters for transfer to the HSM, or (2) read a punch card image into HSM binarily where it can be processed,in any desired manner, under program control. This reader reads by row at a rate up to approximately 600 cards perminute with 20 milliseconds of free computing time between cards. The Card Reader, Model 323, can be instructedto maintain a 300 card-per-minute rate, resulting in 120 milliseconds of free computing time between cards.The Card Reader, Model 323, feed hopper can hold up to 2,000 cards. Two card reading stations within thisreader provide an automatic hole count check. Capacity of the reject stacker is approximately 100 cards. Cards may beloaded and unloaded for continuous operation. The Card Reader, Model 323, has facilities for sensing empty inputhopper, full output stacker, full reject stacker and card jams, and will stop the computer if any of these conditionsexist.The Card Reader, Model 324, under program control will: (1) automatically convert 80-column Hollerith cardcode to RCA 301 characters for transfer to HSM, or (2) read a punch card image into HSM binarily which can beprocessed in any desired manner. Cards may be read on demand at rates of up to 900 cards per minute. Reading isaccomplished by photo-electric sensing diodes.Normally, the card read instruction occupies the mode (Normal or Simultaneous) for the entire card read time.However, a read release option is available which will permit the feed access time (approximately 18.5 ms) to beused for other operations.The Card Reader, Model 324, has an input hopper which has the capacity to hold 2,000 cards. This hoppercan be replenished while the machine is running provided the card level has not fallen below 100 cards. There aretwo output stackers—a main stacker and a reject stacker. The main output stacker has a capacity of 2,400 cards.The reject stacker can accommodate 500 cards.The Card Reader, Model 329, under program control will: (1) automatically convert 80-column Hollerith cardcode to RCA 301 characters for transfer to HSM, or (2) read a punch card image into HSM binarily which can beprocessed in any desired manner. Cards may be read on demand at an approximate rate of 1500 cards per minute.Reading is accomplished by photo-electric sensing diodes.Normally, the card read instruction occupies the mode (Normal or Simultaneous) for the entire card read time.However, a read release option is available which will permit the feed access time (approximately 13 ms) to be usedfor other operations.The Card Reader, Model 329, has one input hopper which has the capacity to hold 3,000 cards. There are twooutput stackers—the accept stacker and the reject stacker. Each of the output stackers has a capacity of 2,000 cards.Cards may be loaded or unloaded while the Card Reader is operating.One model Card Punch, Model 334, punches by row at a rate of 100 cards per minute. The input and outputhoppers have a capacity of approximately 800 cards each. The cards are read after punching to permit an accuracycheck of the punched data. The punch stops upon sensing an empty input or full output hopper.The second model Card Punch, Model 336, punches by row at a rate of 200 cards per minute. The input andoutput hoppers have a capacity of approximately 2,000 cards each. The capacity of the reject stacker is approximately100 cards. Cards may be loaded or unloaded for continuous machine operation.I l l |
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