Author: G. Schayes and L. Zandarin,

Institut d'Astronomie et de Geophysique, Louvain-Ia-Neuve,

Belgium

Source Language: PAL-III

Memory Required: 8K

Other Software Required: FOCAL 5/69 (DECUS No. FO-

CAL8-52)

Abstract: Allows laboratory experiments to be connected in real time

to the computer in FOCAL language. There are three main parts:

1) A FOCAL function FNEW is created having two independent

features: a) it allows PDP-8/E core memories to be read (or to

be written in) in FOCAL language; b) it allows to read in or to

output pulses on the DR8/EA 12 channel buffered digital I/O.

2) Pulses coming on this DR8/EA interface are creating a dynamic

interrupt of the inner program by executing the FOCAL group

15 instructions (equivalent to a "DO 15").

3) The KP8E Power Fail Detect option is used to save active

registers as AC, LINK and PC when a power low condition is

detected in order to restart the program at the interrupt point

when power is restored.

Media Price Code: D2, F5, G14

Catalog: August 1978