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- Newsgroups: comp.sys.sun.hardware
- Path: sparky!uunet!lysator.liu.se!pen
- From: pen@lysator.liu.se (Peter Eriksson)
- Subject: Re: An Xy450/Xy451 in a Sun4/110
- Message-ID: <1936@lysator.liu.se>
- Sender: news@lysator.liu.se
- Nntp-Posting-Host: ruben.lysator.liu.se
- Organization: Lysator Academic Computer Society, Linkoping University, Sweden
- References: <Bx8rvx.F8x@lysator.liu.se> <1992Nov5.200343.2170@ukw.uucp>
- Date: Sun, 8 Nov 1992 20:16:19 GMT
- Lines: 34
-
- lupe@ukw.uucp (Lupe Christoph) writes:
-
- >pen@lysator.liu.se (Peter Eriksson) writes:
-
- >There is a very simple explanation: The 4/110 is the only Sun
- >VMEbus machine that does not support VMEbus DMA. All VMEbus
- >disk controllers Sun used do DMA, as one would expect.
-
- Ah. Ok, now another question... We have one 4/100 CPU board that is
- malfunctioning, it claims:
-
- Parity Error Detection and Interrupt Test
- No Parity Error Detection Interrupt When Expected
-
- when running with the NORM/DIAG switch in the DIAG position. The board also
- lacks some ICs that I think may be neccessary for it to function correctly. The
- question is if getting those ICs will remove the error reported above. The
- ICs missing is the big square IC that is supposed to sit below the SPARC
- CPU chip and the two smaller square ICs right besides it (in another 4/100
- CPU board one is labelled "Weitek", the other I don't know).
-
- Another thing I'm thinking of doing is installing a Sun 3/200 CPU with 32MB
- of RAM (assuming it all is on a single board - I havn't seen it yet) and a
- Xy451 in the 4/110 box (since the CPU board is dead anyway).. And then I only
- have to repair the broken power supply for that box too... Would that be
- possible? And/or do I have to restrap the small strapping on the backside of
- VME bus backplane in the 4/110 box?
-
- /Peter
-
- --
- Peter Eriksson pen@lysator.liu.se
- Lysator Academic Computer Society ...!uunet!lysator.liu.se!pen
- University of Linkoping, Sweden I'm still bored. Flame me again.
-