> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel > Chiappa via cctalk > Sent: 27 July 2017 14:02 > To: cctalk@classiccmp.org > Cc: j...@mercury.lcs.mit.edu > Subject: Re: Honeywall mainframe CPU front panel ID? > > > From: Dave Wade > > >> All CPU's were upgradable on site to any other model. There wasn't > >> really any difference between the models > > Yes and no, is my impression. I got the impression from my recent reading > that the addition of the Appending Unit used to create the Multics > segmented memory meant changes throughout the CPU, so that in any line > (Multics/GCOS) a CPU could be field upgraded, but one couldn't upgrade > from one line to the other. >
That's actually how I see it. I meant within the 600/6000/L66/DPS line. After doing more reading it looks like the three generations so transistor (600?), TTL (6000, L66, DPS100/200/300) and MOS (some of the DPS8) systems had different panels. I think there is one other difference. The 600 and 6000 models had core memory. L66 onwards had solid state memory.. > >> Later models also had virtual memory which I think used the MULTICs > >> hardware.... > > No, I think GCOS had it's own. (The Multics one was complex, a lot more than > GCOS needed.) > Ah yes that makes sense. > >> so whilst its possible to say a panel is not from a multics box, I > >> don't think its possible to say exactly which model it came from, and > >> indeed as the CPU was upgradable the same panel could have been on > >> multiple models > > Good point. > > > Actually looking at this manual:- > > http://bitsavers.trailing-edge.com/pdf/honeywell/dps- > 8/58009853_DPS8_46_70_Reference_Man_Sep82.pdf > > these are from the original hardware GE600/6000/L66/DPS300 machines. > > The DPS8 had a redesigned panel... > > Thanks for that pointer! I don't know why I hadn't thought of looking for > Honeywell CPU manuals, that should have been obvious!! > Glad you found the link usefull... > Anyway,I found several with useful bits, especially this one: > > http://bitsavers.trailing-edge.com/pdf/honeywell/multics/AM81- > 04_maintPrcds_Nov86.pdf > > which does illustrate a number of the panels. From which it's pretty > conclusive that these aren't Multics CPU panels (sigh). > > These two: > > http://bitsavers.trailing-edge.com/pdf/honeywell/multics/GB61- > 01B_OperatorsGde_Dec87.pdf > http://bitsavers.trailing-edge.com/pdf/honeywell/multics/_58009997- > 040_MULTICS_Differences_Manual_DPS_8-70M_Aug83.pdf > > are also interesting in filling in the history. > > Noel I just wish I had kept more of my Honeywell documentation... Dave
