Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!bellcore!faline!thumper!rtm1
From: rtm1@thumper.bellcore.com (Ravi Masand)
Newsgroups: comp.sys.transputer
Subject: Re: External Memory Write Cycle ...
Message-ID: <1412@thumper.bellcore.com>
Date: 20 Dec 88 19:45:39 GMT
Reply-To: rtm1@thumper.UUCP (Ravi Masand)
Organization: Bellcore MRE
Lines: 16

In article <> you write:
>When writting a single byte to external memory, what happens with
>the rest of the MemADxx lines, are they in tristate or driven by the
>Tp to a known value?  Thanks in advance.
>--
>Dario.

The transputer reference manual (Oct 1986, pg 46) says:
"A seperate MemWrB signal is provided for each byte. A word (32 bit ??)
write uses all the notMemWrB signals. If a particular byte is not to be
written, then the corresponding data outputs are tristated"

So, yes, they are tristated.

				Ravi Masand
				bellcore!thumper!rtm1