> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Charles > Anthony via cctalk > Sent: 27 July 2017 21:22 > To: Ed Sharpe <couryho...@aol.com>; General Discussion: On-Topic and > Off-Topic Posts <cctalk@classiccmp.org> > Cc: Noel Chiappa <j...@mercury.lcs.mit.edu> > Subject: Re: Honeywall mainframe CPU front panel ID? > > On Thu, Jul 27, 2017 at 11:55 AM, Ed via cctalk <cctalk@classiccmp.org> > wrote: > > > In looking at our collection of panels in front of us, the large group > > of smaller and large black panels seem to be the same between all op > > sys however. On the main panel - yes the difference is the APU > > lights. > > As I work though the volume of stuff in warehousing will have to > > keep an eye out for one with APU. > > > > > If you know the provenance of a panel (which site it came from), it may be > possible to work out what model of machine it came from; Multicians.org has > a list of sites and some information about the sites hardware. > > > > > Would all the processors have APU on the panel or just some of > > them in a cluster ( if that is the correct term) > > > > > For a multiple CPU Multics, all of the CPUs would have the APU. > > I don't know if CGOS supported multiple CPUs; a quick google didn't turn up > any examples, but I don't think that there is any hardware reason why they > couldn't. >
GCOS (and the original GECOS) supported multiple CPU's, up to 4 CPUs. I remember being told that Littlewoods (who had 2 x 4 CPU systems) noticed that one complex was running slowly, and eventually realized it had lost a CPU because a switch on one of the panels we have been discussing was set wrongly. As for the DPS100/200/300 I think this was merely a "re-badging" of the L66 systems. When I was at NERC our L66/60 single CPU box was upgraded to a 2 x CPU DSP300.. > I don't think there is any difference in GCOS/Multics SCUs; later SCU models > had more memory (Multics: Many Unnecessarily Large Tables In Core > Simultaneously). > > Some of the IOMs had a "Multics" mode that enabled them to access the > Multics page tables; it is not clear(to me) that that model was required for > Multics; I am researching. > > -- Charles Dave Wade G4UGM & EA7KAE
