Re: More ZipGS Upgrade Woes!!

["Marvin Miller" <marvinmiller@hotmail.com>]

THANK YOU!!!!

I needed to hear from someone with practical experience using these 'modern'
chips.

My very Best;

Marvin Miller


"Jason" <someone@somewhere.com> wrote in message
3A777279.86147B71@somewhere.com">news:3A777279.86147B71@somewhere.com...
> Marvin,
>
> I have upgraded both my Transwarp and my ZipGS with the 14MHz 65816's from
WDC.
> The pinouts, voltage levels and inputs are identical.
>
> As long as the oscillator has not changed, there is absolutely no reason
that
> the 7MHz chip will work, and the 14MHz version will not except:
>
> the 65816-14 is bad
>
> You already knew this.  I am just confirming your suspicion.
>
> I would return it to WDC and wait for a replacement.
>
> Cheers!
>
> --> Jay
> (jkett8 AT gte DOT net)
>
>
> Marvin Miller wrote:
> >
> > Hello RubyWand;
> >
> > Thanks for the reply. I printed off your reccomendations and tried them
out.
> > I removed all cards except for the Zip and the Memory Card. I know that
the
> > system has no problems with the Zip, Second Sight, SCSI, & Memory card
but
> > to be sure I removed 'em all. I than cleaned the contacts on the new -14
> > chip and re-inserted it. It went in with a satisfying click.
> >
> > I tried booting up and the same thing. I can actualy get the copyright
and
> > Rom 3 screen but than nothing. More typically is garbled display and
> > flashing cursors with the odd fatal system error message.
> >
> > As far as the 74F00 goes, mine has been replaced with a known good
74HC00. I
> > do not have the original 74F00 to try anymore. Just to sum up;
> >
> > -I cleaned all pins
> > -I eliminated any power supply concerns
> > -I'm running the 74HC00 chip
> > -The old -7 chip will work while the new -14 will not. Both carry
identical
> > part numbers except for the speed rating.
> >
> > Has anyone out there had problems with the new -14 chips? Is it possible
> > that the chips have been changed in some way as to make them not
compatible
> > with the Zip Gs or TransWarp?
> >
> > Best & Hoping for continued help.....
> >
> > Marvin Miller
> >
> > "Rubywand" <rubywand@swbell.net> wrote in message
> > 3A771EE8.7591F893@swbell.net">news:3A771EE8.7591F893@swbell.net...
> > > Marvin Miller writes ...
> > > >
> > > > Hi Friends;
> > > >
> > > > I got a new WDC processor for my ZipGS and am having problems with
it. I
> > > > suspect it's DOA but could use some more opinions...
> > > >
> > > > Card works well with the old -7 proc but as soon as I install the
new
> > > > W65C816S8PL-14 proc the computer dies.
> > > > When I re-boot with the new chip the screen appears garbled etc.
> > Sometimes
> > > > you can get to see the ROM 3 screen but than nothing. Other times I
get
> > an
> > > > error code;
> > > >
> > > > Fatal System Error 0682
> > > >
> > > > I mean it's pretty simple - pull one chip & install the new one.
I've
> > tried
> > > > several times and the net result is that the old -7 works fine, the
> > new -14
> > > > does not. The pins all look good.
> > > >
> > > > Just wanted to check to see if there might be something simple I'm
> > missing -
> > > > this happens all the time!!
> > > >
> > >  ....
> > >
> > >      A bad chip is a possibility. It does not seem likely, though.
> > >
> > >      One thing to check is the contacts (pins) on the new '816. Look
at
> > them under
> > > a magnifier with good lighting and see if you detect any pins that
look
> > dull. If
> > > you do find one, try (carefully) scraping the lead with a needle or
small
> > jewler's
> > > screwdriver to get shiny metal.
> > >
> > >      The new '816 may use different kinds of inputs (requiring
different
> > "1" and
> > > "0" voltage levels) in at least a few places. A fairly easy try at
fixing
> > things
> > > is to pull the 74F00 and plug in a 74HC00. This is a standard part of
> > speed
> > > upgrades which should probably be done whenever a new '816 is swapped
in.
> > >
> > >      Something else to check is that your IIgs is not running with low
> > voltages:
> > > especially, low voltage on the +5V line. If you have any power-sucker
Slot
> > cards
> > > plugged in and have not done any of the usual power supply and
motherboard
> > mods,
> > > you may be getting just enough voltage to run the old '816 but not
enough
> > for the
> > > newer version. (A test would be to see if-- with power OFF-- pulling
some
> > Slot
> > > cards fixes things.)  For more effects of heavy loading and fixes, see
> > > http://home.swbell.net/rubywand/Csa2POWER.html .
> > >
> > >
> > >
> > > Rubywand