Persistent Link:
http://hdl.handle.net/10150/606661
Title:
Recent Improvements in the SDP-3 Computer
Author:
Cliff, R. A.
Affiliation:
Goddard Space Flight Center
Issue Date:
1969-09
Rights:
Copyright © International Foundation for Telemetering
Collection Information:
Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
Publisher:
International Foundation for Telemetering
Journal:
International Telemetering Conference Proceedings
Abstract:
The SDP-3 is a small serial computer which will be flown as an engineering experiment on the IMP-I (eye) spacecraft. In this application it will handle data acquisition for four of the scientific experiments. Modifications to the SDP-3 which improve its operation with little change in hardware complexity include: (1) permitting full-word indirect addressing in user mode for all instructions which do not modify the contents of memory, (2) extending output channel capability to cover all of memory, (3) a new subroutine linkage instruction, (4) a conditional skip on memory zero instruction, (5) byte oriented instructions, and (6) improved index register manipulation instructions. The use of 8-bit MSI shift registers produces a significant hardware and power saving at the expense of deleting all left-shifting instructions. Further hardware savings are realized with a special multiplication instruction which allows the MQ register to be deleted. As a result of these, and other, modifications the power dissipation of the SDP-3 has been decreased by 2/3 watt and the number of IC's by 260 while in most respects operation has either been unchanged or improved.
Sponsors:
International Foundation for Telemetering
ISSN:
0884-5123; 0074-9079
Additional Links:
http://www.telemetry.org/

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleRecent Improvements in the SDP-3 Computeren_US
dc.contributor.authorCliff, R. A.en
dc.contributor.departmentGoddard Space Flight Centeren
dc.date.issued1969-09en
dc.rightsCopyright © International Foundation for Telemeteringen
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en
dc.publisherInternational Foundation for Telemeteringen
dc.description.abstractThe SDP-3 is a small serial computer which will be flown as an engineering experiment on the IMP-I (eye) spacecraft. In this application it will handle data acquisition for four of the scientific experiments. Modifications to the SDP-3 which improve its operation with little change in hardware complexity include: (1) permitting full-word indirect addressing in user mode for all instructions which do not modify the contents of memory, (2) extending output channel capability to cover all of memory, (3) a new subroutine linkage instruction, (4) a conditional skip on memory zero instruction, (5) byte oriented instructions, and (6) improved index register manipulation instructions. The use of 8-bit MSI shift registers produces a significant hardware and power saving at the expense of deleting all left-shifting instructions. Further hardware savings are realized with a special multiplication instruction which allows the MQ register to be deleted. As a result of these, and other, modifications the power dissipation of the SDP-3 has been decreased by 2/3 watt and the number of IC's by 260 while in most respects operation has either been unchanged or improved.en
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/606661en
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.typetexten
dc.typeProceedingsen
dc.relation.urlhttp://www.telemetry.org/en
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