Re: Apple IIgs random hardware crashing - any ideas?

[ToasterKing <toasterking@SPLATbigfoot.com>]

Ed,

Thanks, again, for your reply.  While the CPU connector and cable on
the TWGS could be at fault, I don't see why the crashes would still
occur when the TWGS is removed and the original 40-pin DIP CPU swapped
back in.  Thank you, though, for the information.  I'll file it away in
case it's needed later.  BTW, I know that the TWGS does not have to be
in any particular slot since it only uses the slot for power to the
card (isn't that right?).  How far away from Slot 3 have you
successfully mounted the TWGS, i.e. how long of a CPU cable have you
made reliably?  I'd think that long, unshielded ribbon cable carrying
logic signals under several cards oscillating at high frequencies
wouldn't be a good thing for EMI and induction of noise.

In article <3F85982B.1040701@apple2.com>, Ed Eastman <ed@apple2.com>
wrote:

> Well if it isn't the CPU socket, then it is probably the cable.  Replace 
> the TWGS CPU jumper cable.  You can make one with parts from Digikey. 
> Parts are called DIP connector and Socket connector on pages 19 and 16 
> respectively, part# C8PPG-4006M-ND and ASC40G-ND respectively.
> 
> Get one 40 pin 60mm Dip to Dip connector and cut it in half.  Get two 40 
> pin Socket connecotrs and maybe two extra just because.  (I actully get 
> mine from old IDE cables.)  Assemble slowly by squeezing evenly across 
> the whole socket connector.  (Think vice.)  Then ohm out the cable to 
> make sure it wired the same as the original cable.  If every other wire 
> is incorrect, you need to open the socket connector and rotate each pin 
> 180 degrees and reassemble.
> 
> Thankx,
> Ed
> 
> ToasterKing wrote:
> > I have replaced the whole CPU socket on the GS motherboard.  That
> > should take care of any bad solder joints AND any sprung contacts in
> > the socket.  I checked solder joints on other sockets as well.  But
> > that didn't work; I still get the same results.
>

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