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From: aglew@urbsdc.Urbana.Gould.COM
Newsgroups: comp.arch
Subject: Re: Problems with NeXT (25 MHz NuBu
Message-ID: <28200231@urbsdc>
Date: 5 Nov 88 21:47:00 GMT
References: <5155@cbmvax.UUCP>
Lines: 30
Nf-ID: #R:cbmvax.UUCP:5155:urbsdc:28200231:000:1249
Nf-From: urbsdc.Urbana.Gould.COM!aglew    Nov  5 15:47:00 1988


>From the BYTE photos, the NeXT layout looks like this:
>
>	+---+---+----------+---+---+
>	|   |   |          | N |   |
>	|   |   |  Disks   | e |   |
>	|   |   |          | X |   |
>	|   |   |          | T |   |
>	|   |   |          |   |   |
>	|   |   |          |   |   |
>	|   |   |  Power   |   |   |
>	|   |   |          |   |   |
>	+-1-+-2-+----------+-3-+-4-+
>
>Having the disks in the center might be prettier, but you've got to pay a penalty
>in line lengths going to slots 1 and 2.  Of course, this forces you to deal with
>a foot long backplane even if it doesn't have that many real slots.  The limit
>on NuBus anyway is 16 slots, though there's a pretty good chance you's have a
>hard time running a 16 slot NeXTBus machine, especially given that goofy NuBus
>asymmetric clock.
>
>Dave Haynie  "The 32 Bit Guy"     Commodore-Amiga  "The Crew That Never Rests"
>   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: D-DAVE H     BIX: hazy
>              Amiga -- It's not just a job, it's an obsession
>

Of course, it's possible that they have a lot of cables going into the
top and bottom surfaces of the boards in slots 3 and 4, rather than going
into connectors on the board edge; but what I've seen of the cube makes
me doubt that.