Article View: sci.space.shuttle
Article #5869Re: Shuttle Computer Info?
From: Jeff Berkowitz
Date: Sun, 07 May 1989 06:59
Date: Sun, 07 May 1989 06:59
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1355 bytes
In article <24055@agate.BERKELEY.EDU> labc-4da@e260-4d.berkeley.edu (Bob Heiney) writes: >What kind of information can I get on the design, implementation, etc. of >shuttle software? Is there someone I should write? As noted in another posting, the Sept 84 CACM has excellent coverage. I found the section about the synchronization of the primary computers particularly fascinating. The four flight computers don't run in lockstep at the hardware level; all cross checking is under the control of the HAL/S code. Synch points and checks are only as good as the real time software which implements them. There is some discussion of the synch bug which delayed the very first shuttle launch. The article also goes into the (excruciating:-) configuration control process used for the software. Highly recommended. -- Jeff Berkowitz N6QOM uunet!sequent!jjb Sequent Computer Systems Custom Systems Group
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!tektronix!sequent!jjb From: jjb@sequent.UUCP (Jeff Berkowitz) Newsgroups: sci.space.shuttle Subject: Re: Shuttle Computer Info? Message-ID: <15715@sequent.UUCP> Date: 7 May 89 06:59:23 GMT References: <24055@agate.BERKELEY.EDU> Reply-To: jjb@sequent.UUCP (Jeff Berkowitz) Organization: Sequent Computer Systems, Inc Lines: 18