Re: Can anyone help me with TranswarpGS problems?

[Dean Shutt <junk@punaka.com>]

They look OK to me.  Package size and pinout appear to be identical.


On Mon, 5 Jul 2004 10:38:48 -0400, "Tim Haynes"
<timhaynes@no.spam.please.alumni.uwaterloo.ca> wrote:

>Hi Dean,
>
>Thanks for pointing me at mouser - they look great!  Nice prices with no
>minimum - very sweet.
>
>I'm going to try getting a 48MHz and a 50MHz crystal, on the off-chance that
>I can squeeze out 12.5MHz from the TWGS.  What do you think of this line of
>crystals?
>http://www.mouser.com/index.cfm?handler=displayproduct&&lstdispproductid=563282
>
>They have 48 and 50 MHz versions so I can get one of each.  The one you
>pointed out has only 48, but I will go with it if you think the one I found
>is no good.
>
>Thanks!
>Tim
>
>"Dean Shutt" <junk@punaka.com> wrote in message
>l6ohe05g2erlif8csq1ompjm5hi214di6h@4ax.com">news:l6ohe05g2erlif8csq1ompjm5hi214di6h@4ax.com...
>> www.mouser.com is a good source.  A 48 Mhz crystal is $1.70 and Mouser
>> has no minimum order.  I ordered a number of different frequency
>> crystals to test in my Transwarp GS from this source.  The 48 MHz part
>> number is 520-TCH4800.
>>
>> Check the web site for the other speeds available.  They range from 1
>> MHz to 66.666 MHz all at the same price.
>>
>>
>>
>>
>>
>> On Sun, 4 Jul 2004 16:17:36 -0400, "Tim Haynes"
>> <timhaynes@no.spam.please.alumni.uwaterloo.ca> wrote:
>>
>> >Thanks to Mark, Glenn, and Wayne for their suggestions regarding
>replacing
>> >the CPU on my TWGS.  I did the swap today, and have posted some pictures
>of
>> >the work to my website again (www.csclub.uwaterloo.ca/~tshaynes/TWGS).
>The
>> >new pictures are dated today (July 4).
>> >
>> >I had to remove a plastic collar from around the CPU, and I did that with
>> >tiny screwdrivers.  after that, replacing the chip was easy.  I
>considered
>> >drilling a small hole through the bottom and pushing it out, but you can
>see
>> >that that would be inadvisable as there seem to be some metal contacts on
>> >the top of the PCB beneath the socket that are not visible from beneath
>the
>> >PCB.
>> >
>> >Anyway, I swapped in the faster CPU and got a clean bootup right away
>(even
>> >without putting the plastic collar back on the socket!).  The very last
>> >picture I posted shows the TWGS booting up minus the collar on the
>socket.
>> >Heh.
>> >
>> >So I have it running a continual self-test.  After about 20 minutes, have
>> >been getting one freeze-up or another (last time it was socket slowdown
>> >test)... before that, it was a lockup on a RAM test).
>> >
>> >Does anybody know a good source for 50MHz half can crystal?
>> >George from Michigan mentioned in email that someone at one point was
>> >selling (for $10) gold plated chip/ribbon connectors.  Does the person
>who
>> >used to make them still come around?  Does anybody remember who that was?
>> >Was it Joachim?
>> >
>> >Thanks again
>> >Tim
>> >
>>
>