FOCAL Overlay CHAIN
| FOCAL8-218
|
Herbert Zimmerman, Digital Equipment GmbH, Co!ogne,
Germany
The overlay CHAIN was written to minimize the amount of
hardware for the sophisticated usage of FOCAL. Two basic
programs are included - a program to build a system tape and
to call the various FOCAL-Interpreter configurations, and
the overlay CHAIN. The functions of the overlay CHAIN
are: a common area in core for integers, 3 word and 4 word
floating point numbers; store and fetch of common area on/
from DECtape; a "computed GOTO" function; storage of
FOCAL programs on DECtape and chaining of several programs.
| Minimum Hardware: | 4K PDP-8/E; Single or dual
transport TD8/E
|
| Other Programs Needed: | Binary Loader, FOCAL DEC-08-
AJAE-PB, FOCAL 4 word overlay
|
| Storage Requirement: | Approximately 4 pages
|
| Restrictions: | For 4K only, RIM and BIN will be
destroyed
|
| Source Language: | PAL-8
|
| Catalog:
| July 1973
|