Re: TWGS question

[voss@i40s16.ira.uka.de (Stefan Voss)]

In article <nandu.76.0@anest4.anest.ufl.edu>, nandu@anest4.anest.ufl.edu (Nandu S. Shah) writes:
|> I recently bought a used TWGS running at 10 MHz.  The previous owner had 
|> done all the necessary upgrades & even sent along a 50 MHz crystal, which I 
|> eagerly installed.  Now, my computer ran flawlessly at 10, but at 12.5 it 
|> crashes occasionally for no apparent reason (the aforementioned previous 
|> owner warned me that it might not be "stable" at that speed).  My question 
|> is, what causes the instability?  Is it the speed of the sRAM in the cache?  
|> Is it a lack of power?  Is there anything I can do to make the TWGS reliable 
|> at 12.5 MHz (or faster)?

I don't know about the SRAMs. Could be.
Another source of trouble could be the CPU. When I looked at the "shmoo plot"
that came with my "14MHz"-CPU, I found out that the CPU had passed the tests
only up to ca. 12.8 MHz. 
I suggest that you look at your shmoo plot if you have one. If not, try a 
48-MHz-crystal, then a 44-MHz-crystal, ...

|> 
|> Nandu Shah                                          nandu@anest4.anest.ufl.edu
|> 

Stefan Voss
(voss@ira.uka.de)