RE: 65816 board for 6502 computers

From: Baltissen, GJPAA (Ruud) (
Date: 2004-05-06 12:44:05

Hallo Nick,

> Why is it that this should happen? According to the WDC
> datasheed (and example circuit) the clock signal to the
> 74573 is same as the clock applied to the 65816 - no
> further phasing needed?

I only know this: the 65816 outputs A16..23 when PHI0 is (L). A 573 latches
the input when its CLK-input  is (H). Thus this input needs the inverse of
PHI0. PHI1 is the inverse of PHI0. Thus I use PHI1 to clock the 573. Proove:
it works on my SuperVIC-20.

   / __|__
  / /  |_/     Groetjes, Ruud
  \ \__|_\
   \___|       URL:


De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen.

The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose its contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission.
       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.