Author: Paul T. Brady and Judy Popelas

Bell Laboratories, Holmdel, NJ

Source Language: PAL-8

Memory Required: 8K

Abstract: Real Time FOCAL (RTF) is an adaptation of FOCAL

MOD-V to allow input/output statements to be executed in the FOCAL

language with millisecond timing accuracy. That is, the times at which

inputs occur can be determined to within one msec, and outputs can be

controlled to one msec accuracy. Also included in RTF are: (1) a

statistical random number generator, (2) a computed GOTO statement,

and (3) a logical AND function. RTF requires a PDP-8 with 8K memory

and a real time clock and can be adapted to drive a variety of 12-bit

input/output devices such as the BDIO on the PDP-8/E.

Two versions of RTF are available. The principal difference between

them is that the first uses a clock and two BDIO devices that operate off

of the PDP-8/E Omnibus, as well as some "standard" I/O bus devices,

while the second version, written for the 8/L, performs I/O exclusively

with standard I/O bus modules.

Media Price Code: D5, F12

Catalog: August 1978