Re: TransWarp Upgrade

[Rubywand <rubywand@swbell.net>]

ladyphoenixxii@my-deja.com writes ...
> 
> After waiting for Herbert to reappear and conclude the group buy to upgrade
> the Transwarp GS, I finally bit the bullet and ordered the 32k cache v1.8
> eprom ("option D almost plug and play" not indicated on the website) and
> cable from ///SHH Systeme.  My GS works beautifully now. No crashes at all!
> 
> Also Herbert has still not answered any email.
> 
> I was using the information I got from to order the WDC chip and oscillators,
> but discover that the information he gave me isn't complete enough to figure
> out what to buy.
> 
> He said he was ordering W65C816PL-7 from Western Design Center, but that
> isn't listed. Is W65C816S8PL-14 the ONE.
>

     That looks like the one. (See http://www.wdesignc.com/ch816S.html .)  The
65C816 comes in a 40-pin DIP ("P") package and 44-pin quad (e.g. "PL")
packages.


 
> He was going to order the oscillator from Digikey or Arrow/Bell.  Digikey has
> a bunch of oscillators/crystals listed under 50MHz.  Without pictures I can't
> begin to tell what one to order.
> 
> I'd appreciate any help on getting the right things.
> 

     Here is a snip from the newsgroup FAQs which should help:



FAQs-on-Ground ref: Csa2ACCEL.txt
>>


015- How do I experiment with different oscillator frequencies?

     Most of the following is from a piece on ZipGS upgrading by Long. It is
also a useful guide for TWGS owners.

     The ZipGS can use three types of crystal oscillators: the common 4-pin
"full TTL" size oscillator module (about the size of a 14-pin TTL IC), a 4-pin
"half TTL" size oscillator module (also used on TWGS), or an on-card circuit
with a separate crystal (little 2-pin metal canister).  To be able to use a
separate crystal, your ZipGS must have a resistor at R1 and capacitors at C13
and C14. I've found these three parts to be missing from current Zips which use
an oscillator module.

     Experimenting with different frequencies will be easier if you install a
14-pin socket for the oscillator module. (If your ZipGS has eyelets for a
16-pin socket*, leave the top two pins open.)  It's also a good idea to secure
the module with one of those zip tie bands.

     Only 6 of the 14 pins are connected (picture A). The Ground (GND) pins 1,
4 and 7 are connected together. The Power pins 11 and 14 are connected
together; and, pin 8 is the module Output. Full-size oscillator modules use
pins 1, 7, 8 and 14 (refer to picture B).  Half-size oscillator modules use the
bottom four pins (4, 7, 8 and 11; picture C).

     Make sure the module is oriented with the marked end (usually having a dot
and/or notch) facing upward. The lower two pins of the module should be in the
lowest two pins of the socket.


  WARNING: The oscillator may be damaged if installed incorrectly.

        * x     x *                _______
   GND  1 o     o 14  POWER     1 |o      \  14
   NC     x     x     NC          |        |
   NC     x     x     NC          |  FULL  |           ______
   GND  4 o     o 11  POWER       |  TTL   |        4 |o     \  11
   NC     x     x     NC          |        |          |  HALF |
   NC     x     x     NC          |        |          |  TTL  |
   GND  7 o     o  8  OUTPUT    7  \______/   8     7  \_____/   8

            (A)                      (B)                 (C)

   x - no connection (NC)


<<


     Besides Digi-Key, another place with oscillators at reasonable prices is
Mouser ( http://www.mouser.com/ ).




Rubywand