Browse Prior Art Database

Program Step Control

IP.com Disclosure Number: IPCOM000070180D
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21

Publishing Venue

IBM

Related People

Authors:
Chilinski, H Geng, H Hajdu, J [+details]

Abstract

For dynamically fetching program step sequences, a program step control is used directing the program sequence via two registers and a conversion table. One of the registers serves as a program step counter which is initialized upon entry into the program. The other register is loaded with a control bit pattern which is used as a selection value for the program step sequence to be fetched. Digit "1" in a particular bit position of the control bit pattern means fetching a program step, and digit "0" means omitting this step. The bit position denoted by the count of the program step counters is used as an address to a table containing the start addresses of the program steps.