Author: J. S. B. Clark, Poultry Research Center, Edinburgh, Scotland

The write-up describes a hardware modification to the PDP- 8/L which will allow a greater facility for bit manipulation than is possible with the standard instruction set. The modification extends the use of the ISZ instruction. An example shows the application of this LISZ instruction to a polarity-quantized algorithm, with a reduction of between 15% and 50% in execution time.

Hardware Required: PDP-8/L or 8/I

Source Language: PAL III, PAL-D

Restrictions: Involves a small hardware modification

Catalog: June 1976