Re: Post Your ZipGS Info Here!

[thoang@orion.oac.uci.edu (Trangdaithi Hoang)]

In article <5BkPTc3w165w@tlp.apana.org.au>,
Peter Maloney <peterm@tlp.apana.org.au> wrote:

>My experience so far is very mixed. The 65816-14 is in the ZipGS along 
>with 45ns SRAM and it all works at 8MHz. But if I put a 40MHz crystal in 
>the screen stays in checker-board. With a 48MHz crystal the checker-board 
>is coloured (LoRes) and has flecks flashing through it. 
>Time to get new crystals or do I *really* have to replace the TTL gates 
>to get to 10MHz? I wouldn't think it would be that critical, but then 

For 10 MHz, all you have to do is replace the srams with four Toshiba
TC553238P 25 ns (these are skinny dips BTW).  Everything else on the
board should be ok including the 74F00 and 74F02 logic chips.