Re: Speeding up aTransWarp IIGS

[Wayne Stewart <waynes@intergate.ca>]

Giorgio Ungarelli wrote:
> 
> Hi,
> 
> I have a TransWarp IIGS with the 32K cache.  Its ROM is V1.8S and it
> is running at the standard 7MHz speed (at least that is what one CPU
> test program is giving me under ProDOS).  I have read that it is
> possible to speed this card up even further.
> 
> Am I right in assuming that the only two items I need to purchase and
> replace on this TransWarp IIGS card are:
> 
> ECS HALF SIZE CRYSTAL CLOCK OSCILLATOR dip-8 5v 64.0 mhz
> ECS-2100A-64.0MHZ from http://www.mouser.com
> 
> and
> 
> W65C816S8PL-14 CPU from http://www.westerndesigncenter.com
> 
> With the two changes above, I should end up with a 16MHz TransWarp
> IIGS, right?
> 
> If I purchase the 50MHz half size oscillator instead of the 64MHz
> oscillator (just to be on the safe side), then the TransWarp card
> should run at 12.5 MHz.
> 
> If I am missing some information (or even if the above is correct),
> could somebody please confirm?

You're mostly right. However very very few TranswarpGSs will go to 
16mhz no matter what you do. The top speed varies from card to card, 
usually you're considered lucky if you can get a stable 14mhz. If 
you have to order the oscillators then I'd order a few more in 
between. You'll likely be able to boot at 12.5mhz but you may or may 
not be stable.

	Wayne