Hello Everyone,
This is one area that WDC should spend some time on if for nothing else
but to dispell alot of the myths that are hard to discredit based on the
limited resources most of us hobbyists have. WDC likes to cut and paste
their documentation sometimes so you have to be carefull.
For anyone that is interested in this subject of oscillators especially
those that use logic gates try searching for " Pierce Oscillators" on the net.
Next there are inexpensive alternatives " out there " like Epson's
SG-531 series which is low power and comes in a small plastic package.
Check out DigiKey as a source. I use them with my 65C265 projects
and find they work really well if you want to quickly swap one freq for
another. I think their price is under 4.00
The last point is one which Garth ( Wilson ) and I discussed over the
years. That is the max freq using wire-wrap. I can honestly say that you
can run wire-wrap to at least 8Mhz reliably. I am currently running my
present sbc at 8Mhz using a prototype technique discussed in Circuit
Cellar's December 2000 issue by Stuart Ball. I don't want to start a flame
war here, but don't be scared of wire-wrap.
Hope everyone is enjoying Summer
-Wally
DonnaD wrote:
Your right... the W65C02S datasheet says slew of 5ns, but the 74LS04 is actually 9-10 ns.
I Maybe it would only show up in higher frequencies... i'm only running at 2Mhz... maybe I'll order a 4mhz and and 8mhz crystal and see what happens.