Author: Ult Weidmann

Dept of Psychology The University Leicester 7RH England

Operating System: OS/8

Source Language: PAL-8

Memory Required: 8K or 12K

Abstract: This overlay to 8K or 12K U/W-FOCAL (Vers. 3M) permits

the execution of a string of up to 14 machine-codes from FOCAL by

calling S Z = FX(ARG0, ARGl, ... ARG14). Its arguments must be

decimal equivalents of (Octal) PDP-8/E instructions, addresses or con-

stants. ARG0 is put into the AC before the command-string is entered,

and its value on exit from the string-which is automatic-will be passed

back to FOCAL.

There is no write-up but details and examples are given in the listing.

FX can be called many times in a FOCAL program to set/clear enable

registers, flags, test interrupts, change content of specified addresses, etc.

The function is a development of that given in FOCLF (F0CAL8-227 A).

Media Price Code: D1, G5

Catalog: August 1978