On Fri, 20 Jun 2008, jim s wrote:
not impossible it's off a 1620. have you searched
photos of it?
i know it had thermal issues. I would not be surprised the 700 ibm series
would have thermal issues, but on indicator on a panel like this would be a
bit shy of showing the true extent of a thermal issue with those system.
I have some closeup pictures of the 1620, and it's definitely not that.
I've also looked at all the IBM manuals available on Bitsavers, for that
period.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology
http://sturgeon.css.psu.edu/~mloewen/Oldtech/