Accession Number:

ADA196942

Title:

Parallel Logic Programming and ZMOB

Descriptive Note:

Final rept. 30 Jun 1982-13 Feb 1988

Corporate Author:

MARYLAND UNIV COLLEGE PARK

Personal Author(s):

Report Date:

1988-04-26

Pagination or Media Count:

12.0

Abstract:

This final report presents a summary of research accomplished to investigate parallel problem solving. Under the current grant a parallel problem solving system, PRISM Parallel Inference System, that was implemented on the VAX11-780, the PYRAMID and SUN machines, was ported successfully to McMOB and then to the BBN Butterfly parallel architecture. The McMOB architecture is essentially the ZMOB architecture with 16 Motorola 68000 processors, upgrading the Z80A microprocessors, interconnected in a ring structure. Experimental testing of PRISM on McMOB was undertaken in the current year. In addition, several enhancements were made to PRISM to permit experimental analyses to be made, and to incorporate additional features to take full advantage of parallelism in a problem solving environment. The tracing and statistical gathering packages were extended. An ability to display AND-parallelism was added to the trace program which displays the execution of a program on the parallel machines. In addition to the above, work continued in the area of informative answers to be presented to a user. Heuristic techniques were developed to determine which information to display. Keywords Splicing compilers, Debugging software, Artificial intelligence.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE