Re: Transwarp GS freezes

[Michael J. Mahon <mjmahon@aol.com>]

<gids.rs@sasktel.net> wrote:
> On Tuesday, September 4, 2012 12:39:41 PM UTC-6, STYNX wrote:
>> I ran some more tests. The card was unstable if the temperature
>> somewhere on the cacheboard changed. I unsoldered the sram sockets and
>> used a multimeter to identify any broken traces. There was one! i
>> soldered a bridge - no more problems. The card runs fine at 14 mhz and
>> nearly at 16. In the testing process i came to the conclusion, that in
>> addition to the broken trace the TWGS didn't like Cypress or ISS Sram
>> ICs. luckily i had some UMC branded ones left that worked (only 20ns though).
>> 
>> Thanks for the help...
>> 
>> - Jonas
> 
> Grounding might be an issue here.  I added a couple of ground wires from
> the PSU to the ground in slot 3 and one to slot 7.  This eliminated a lot
> of noise and made my system more stable.
> 
> Rob

I'd be willing to bet that additional bypassing would work just as well. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon