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From: tony@raid5.uucp (Tony Andrews)
Newsgroups: comp.sys.atari.st
Subject: Re: TT RAM
Keywords: TT VME
Message-ID: <1990Sep23.013812.3470@raid5.uucp>
Date: 23 Sep 90 01:38:12 GMT
References: <3107@medusa.informatik.uni-erlangen.de> <2304@atari.UUCP> <3118@medusa.informatik.uni-erlangen.de> <2310@atari.UUCP>
Reply-To: tony@raid5.UUCP (Tony Andrews)
Organization: Array Technology Corp., Boulder, Colorado
Lines: 27

In article <2310@atari.UUCP> apratt@atari.UUCP (Allan Pratt) writes:
>My comment about VME RAM was not clear.  In the TT030, which is the
>full name of the machine that's now available, there are two kinds of
>VME address space: A24/D16 and A16/D8.  These are not 32 bits wide, so
>the SCSI chip can't access them.  The memory map, telling where in
>memory those segments appear, should be part of the TT documentation:
>if it's not, it will be.

The thing that has interested me most about the TT is that it is
probably going to be the cheapest VME machine around.  My company
develops disk arrays that operate over the VME interface (among
others).  We currently find it difficult to give each software
developer their own VME host and disk array.  A cheap VME machine
like the TT might change all that (once a UNIX port is available,
anyway).

Could you give me some more specifics about the VME on the TT? Is
it a 6U card cage?  How many slots are available?  How much power
is available?  Are A24/D16 and A16/D8 the only supported modes?
(A16/D16 would be nice.)  Is host memory accessible by VME bus
masters?

-- 
Tony Andrews				uunet!dunike!onecom!raid5!tony
Array Technology Corp.
4775 Walnut St., Suite B
Boulder, Colorado 80301 USA