NCR 315

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The NCR 315 Data Processing System, released in January 1962 by NCR, was a second generation computer. All printed circuit boards used resistor-transistor logic to create the various logic elements. It used 12-bit slab memory structure using core memory. The instructions could use a memory slab as either as two 6-bit alphanumeric characters or as three 4-bit BCD characters. Basic memory was 5k of hand made core memory, which was expandable to a maximum of 40k in four refrigerator size cabinets. The main processor included three cabinets and a console section that housed the power supply, keyboard, output writer (an IBM Selectic-i typewriter), and a panel of lights that indicated the current status of the program counter, registers, arithmetic accumulator, system errors.

Input/Output was by direct parallel connections to each type of peripheral through a two cable bundle with 1 inch thick cables. Some devices like magnetic tape and the CRAM were daisy-chained to allow multiple drives to be connected.

[edit] Available Languages

NCR Assembler Language
National Electronic Autocoding Technique (NEAT/3)
COBOL

[edit] Available peripherals

NCR-321 Communications Controller
NCR-340 600-LPM line printer
Magnetic Tapes
- NCR-332 Magentic Tape Drive (512bpi)
- NCR-333 Control Data CDC Tape Drive (512 bpi)
- NCR-334 Magnetic Tape Drive (200/512 bpi)
NCR-353 Magnetic Card Random Access Memory (CRAM)
Card and Tape Equipment
- NCR-361 Paper Tape Reader
- NCR-371 Paper Tape Punch
- NCR-376 IBM Card Reader/Punch
- NCR-380 2000 CPS High speed card reader
- NCR-472 Card Reader, Paper Tape Reader/Punch
NCR-??? Drum memory
NCR-402 MICR Check Reader/Sorter
NCR-420 Optical Character Reader(OCR)
NCR-407 High Speed MICR Check Reader/Sorter