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- From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
- Newsgroups: vmsnet.pdp-11
- Subject: Re: 11/94 Upgrade problems....
- Message-ID: <1992Nov12.233058.4413@spcvxb.spc.edu>
- Date: 13 Nov 92 04:30:58 GMT
- References: <1992Nov12.151415.21751@thijssen.nl>
- Organization: St. Peter's College, US
- Lines: 43
-
- In article <1992Nov12.151415.21751@thijssen.nl>, geveld@thijssen.nl (Ge v.d. Veldt) writes:
- > Problem 1:
- > The RSX11M-plus operating system crashes at random time intervals with the
- > following console message:
- >
- > XXXXXXXXX Exec. parity error stop XXXXXXXXX
- >
- > After that the CPU halts, no time to generate an errorlog entrie. The same
- > system has no problems when the CPU is a PDP11/84.
-
- You should make sure all of your Unibus boards are up to current revision
- levels, as well as the bus converter (KT84, I think) that converts the Q-
- bus to Unibus.
-
- Was your system upgraded by DEC (they are supposed to check all of this)
- or did you just acquire and install the 11/93 CPU board? Also, make sure
- that you have no Unibus or PMI memory installed.
-
- You could compare the displayed address against the map you got when you
- built your executive. It's either in executive code or data. Finding out
- _what_ code or data might help pin down what device is corrupting memory.
-
- Have you tried another '93 CPU to make sure that you don't have a real
- memory problem? Also, I assume that you have a production-level '93 - the
- prototypes had some rather odd memory timing quirks.
-
- > Problem 2
- > The PDP11/94 processor seem to have another power-up sequence compared with
- > the PDP11/84. When the DT07 has selected the PDP11/94 CPU for unibus exten-
- > sion the frontpanel halt/reset tockle switch will bring the CPU in a not
- > accessable state when manipulated. The only way to get out of that state
- > (without powering down the system) is to deselect the unibusextension via the
- > DT07 frontpanel switches and restart the 11/94 again. This time the normal
- > powerup sequence will take place.
-
- I didn't think the DT07 was supported? I think what you're saying is that
- you have to reset the '93 in order for it to come up after the Unibus has
- been switched? This one you'll probably have to talk to the DEC folks about,
- and maybe ROI as well.
-
- Terry Kennedy Operations Manager, Academic Computing
- terry@spcvxa.bitnet St. Peter's College, Jersey City, NJ USA
- terry@spcvxa.spc.edu +1 201 915 9381
-