Programming instructions

THE INFORMATION DISTRIBUTOR distributes information from the

Internal Processor to all output devices. Only the output device se-

lected (or addressed) by the Device Selector samples and reads in

the information contained in the Information Distributor. Up to 8 x 18

bits may be distributed.

THE INPUT-OUTPUT SKIP CONNECTION provides a program skip

instruction conditioned by the state of a given input-output device

logic line. The instruction following the skip instruction will not be

executed if the line is a 1. Eight skip conditions may be sampled.

THE PROGRAM INTERRUPT permits one of 11 lines (conditions) or

input-output devices to interrupt the program and initiate a sub-

routine which may return to the original program when the cause for

interruption has been processed. The machine state is preserved

during a Program Interrupt. This type of interrupt is suited for in-

formation or event rates in the range of 0 to 2,000 cycles per second.

THE DATA INTERRUPT allows a device to automatically interrupt the

program and deposit or extract data from the Core Memory at an

address specified by the device. The Data Interrupt is suited for high

speed information transfers; up to 125,000 18-bit words may be

transferred per second.

THE CLOCK/TIMER produces a signal which increments a Core Mem-

ory register at a rate of 60 cycles per second. When the register over-

flows, a Program Interrupt occurs.

INPUT-OUTPUT DEVICES

All of the input-output devices are optional except the Perforated-Tape

Reader.

THE PERFORATED-TAPE READER senses 5-, 7-, or 8-hole perforated-

tape at the rate of 300 lines per second. Either one line of tape (alpha-

numeric) or 3 lines of tape (binary word) may be read.

THE PERFORATED-TAPE PUNCH AND CONTROL, TYPE 75, per-

forates 5-, 7-, or 8-hole paper tape at a rate of 63.3 lines per second.

THE PRINTER-KEYBOARD AND CONTROL, TYPE 65, includes a

Teletype Model KSR-28 Printer and Keyboard with an allowable input

or printing rate of ten characters per second. Typed information may

be monitored by a program. A program may print information.

THE PRECISION CRT DISPLAY, TYPE 30, displays data on a 9%” by

9%” area. Information is plotted point by point to form either graph cal

or tabular data. Operation of this device requires the Real-Time Opti

THE LIGHT PEN, TYPE 32, is a photoelectric device which det cts

information displayed on the Type 30 Visual CRT Display. Upon si nal