From: di@di.di   
      
   On Wed, 21 Nov 2007 15:15:57 -0500, "Mike Y"  wrote:   
      
   >   
   >"Ira"  wrote in message   
   >news:14j4k39660r5tr5cvboppe0ol890l7a4ou@4ax.com...   
   >> Greets,   
   >>   
   >> Does anyone know if there is a way to tell whether an expansion   
   >> interface needs a buffered interface or not?  Be it from a snapshot of   
   >> the inside or any other way?   
   >>   
   >> Thanks!   
   >   
   >If you don't see the 3 'twisted wire pairs' with resistor terminators   
   >when you look at the board, then the buffered EI cable was never   
   >installed.  There was also the buffered EI cable with the dongles.   
   >(There was another term for it but I won't mention it here.)   
   >   
   >Those twisted wires were RAS, MUX, and CAS, and they were the   
   >real issue.  In fact, the 'second generation' EI didn't take them over,   
   >the signals were generated 'on board' by a DDU to solve a race/noise   
   >issue.  The units with the DDU (a black rectangle on the EI   
   >board) you CANNOT buffer.  Well, you could, but it didn't matter.   
   >The big issue is there won't be power for the buffered cable unless   
   >the 'mod' is done, and the mod wouldn't get done on the new EI.   
   >   
   >If your question is does it 'need' the buffered EI cable, well, that's   
   >another matter.   Some systems needed it, some didn't.  And you   
   >could swap out CPUs to try to get a bit better on the combination   
   >as well.   
   >   
   >The system I owned back in 1979 didn't need it.   
   >It was rock solid.  Well, except about 6:30 to 8 or so every evening   
   >when the woman in the apartment above me got home.  I don't know   
   >what she did, but my system was solid, until about 15 minutes after   
   >she got home from work every night.   
   >   
   >In the day I did everything I could.  Tried a Corcom 10R1 in the   
   >power cord.  Helped, but not 100%.  The RS power strip helped   
   >too, but not 100%.  Even when I replaced my EI with the new   
   >design, it was not 100%.   
   Did you try to talk to the woman to find out what devices/appliance   
   she was using around that time? (maybe was a good excuse in place of   
   'i ran out of sugar' (:-)   
   >   
   >Funny thing, I don't think it EVER reset on me on a weekend, even   
   >if she was home.   
   >   
      
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