Subject: Re: Zip GS question
Message-ID: <374963D4.B32CCE3A@swbell.net>
From: Rubywand <rubywand@swbell.net>
Reply-To: rubywand@swbell.net

Geraldine Wright writes ...
> 
> Is the Zip GS a power hog? I recently installed one, and my gs now is
> balky about booting. I have ordered a Buggie power supply, but would be
> interested in hearing of other possible explanations for the annoying
> behavior.
 ....

> "Big, fat hairy deal!"  -Garfield


     Garfield is right. What you need are big, fat, hairy +5, +12, and GND
leads coming from your power supply. This mod (see Csa2POWER.txt in the FAQs)
will, usually, eliminate most glitch-related crashes.

     The Zip-GS is not an enormous power hog; but, it does switch enough
current to produce bothersome voltage spikes on the typical skimpy power supply
leads. These spikes propagate throughout the system and cause glitches.

     On a ROM-01, the skinny Slot power traces are another place for spikes to
appear. (There may be a problem on a loaded ROM 3, too.)  Running a decently
fat jumper (about 18 gauge) from the +5V connector point to the +5V pin on the
accelerator board's Slot helps.

     You can find the newsgroup FAQs at ...


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Rubywand