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- Xref: sparky sci.space:19115 sci.astro:13831 alt.sci.planetary:496
- Newsgroups: sci.space,sci.astro,alt.sci.planetary
- Path: sparky!uunet!well!collins
- From: collins@well.sf.ca.us (Steve Collins)
- Subject: Re: Mars Observer Update - 01/08/93
- Message-ID: <C0o3sz.IzG@well.sf.ca.us>
- Keywords: Mars Observer, JPL
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- References: <9JAN199300533179@kelvin.jpl.nasa.gov> <1993Jan10.042812.25658@wuecl.wustl.edu>
- Date: Mon, 11 Jan 1993 02:19:47 GMT
- Lines: 14
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- I turns out that the Mars Observer flight software and the new Mac OS
- turned out to be almost identical in hex. The program can fulfill two
- such different applications because the Mars Observer SCP (spacecraft
- processor)
- interprets the code as Mil-Std 1750A instructions instead of motorola
- 680x0 instructions. The the coincidence was the source of much amusement
- when it was first discovered. It looks like the STAREX anomaly tiger team
- might recommend code changes that would cause the two programs to differ
- again, so we plan to continue our own development rather than waiting
- for the next Apple update...
- Steve Collins MO Spacecraft Team (AACS)
-