[Techtoolslist] 6502 pods & clocks....
John Robertson
jrr at flippers.com
Tue Nov 5 20:22:54 EST 2013
On 11/05/2013 3:18 PM, John Robertson wrote:
> Tic, tock...
>
> The 6502 will clock from either a crystal or an R/C system. The
> problem with the R/C is the capacitor is only 10pf, so the cable
> capacitance will sloooowwwww the clock down somewhat (900kz to 500kz
> or so).
>
> So, being impatient I'm making a simple 7404 1Mhz R/C clock that fits
> into the Fluke adapter socket and will drive the UUT 6502 CPU
> directly, thus the pod won't interfere with the clock frequency and I
> won't get any more timeout errors (I hope).
>
> John :-#)#
Yes, that did work, I was getting timeout errors with the original R/C
clock and now my little 7404 R/C clock has tidied up the signal and is
driving at 900kz which is just fine for testing. I'm now getting
reliable learn, etc. functions.
John :-#)#
--
How to subscribe or unsubscribe from TTL
http://seven.pairlist.net/mailman/listinfo/techtoolslist
More information about the Techtoolslist
mailing list