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From: dplatt@ntg.com (Dave Platt)
Newsgroups: comp.sys.mac.misc
Subject: Re: Question: startup beeps diagnostic?
Message-ID: <771@goblin.ntg.com>
Date: 29 May 91 18:27:32 GMT
References: <0E010021.q0z3vc@gla-aux.uucp>
Organization: New Technologies Group, Inc.  Palo Alto CA
Lines: 23

In article <0E010021.q0z3vc@gla-aux.uucp> glenn%gla-aux.uucp@skinner.cs.uoregon.edu writes:

>If it's internally terminated, then it won't work with the IIfx.

It'd be more accurate to phrase that "... then it may not work reliably
with the IIfx."  An drive which is internally terminated, _and_ which
has a well-designed termination circuit that includes a buffer
capacitor, will work just fine with the IIfx.  Many drives don't bother
to include buffer caps in their internal-termination circuit... and they
may not work reliably with the IIfx.

>                                                                That is
>the reason for the black terminator shipped with the IIfx.  It should be
>the ONLY one used to terminate the SCSI bus.

That's a good approach.  However, there's nothing magic about the black
terminator... it has a couple of bypass caps on the TERMPWR line, but
in other respects it's a vanilla parallel terminator.

-- 
Dave Platt                                                VOICE: (415) 813-8917
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