PDP-11/34A rebuild project Was: Re: Post-move diary - test-drb@ccmp.vtda.org

30 Mar 1999

...
 I should have the prints for it (and for the VR14)
somewhere. I fixed a 
couple of VR14s a few years back - interesting things to work on. Watch 
out for that EHT PSU can - it's a mains transformer + voltage doubler and 
is quite capable of killing you. 
EHT PSU?  You mean the VR14?  Yep, I'll be avoiding that one until
I absolutely have to touch it...

...
 > Two other important cables to root around for in
the box, which go
>between the M8266 and M7859, are two 10-conductor flat cables P/N
>70-11411-1D. When 
...
 Those aren't _essential_ unless you're like me.
They enable the 
'maintenance mode' of the frontpanel - single-step microcode, etc. Some 
manuals recomend against leaving them in the machine (presumably to 
prevent confusing lusers), but I've never had a problem. 
I guess I am like you... if the machine has some capability, I want
it available to me... I'll have to look at it again to try to figure
out what you're talking about as to where the cables go...

...
 They're easy to make from 10 way IDC header sockets
and ribbon cable,
though. 
That's good to know...

...
 I believe you can put an MUD or SPC card in slot 5 if
you don't have the 
cache. I can't remember what happens if you don't have the FPU - either 
slot 3 is also an SPC slot (I think that's the case) or you move 
everything left one slot (Which I think is not the case). 
In the backplane I have, everything except for the first slot and the
last slot is a MUD.  (Confirmed by the decal on the inside of the
chassis and by the printset).

					Megan Gentry
					Former RT-11 Developer

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