Path: utzoo!attcan!uunet!mcsun!unido!uniol!neumann
From: neumann@uniol.UUCP (Frank Neumann)
Newsgroups: comp.sys.amiga.hardware
Subject: DAVE HAYNIE (and others) READ THIS - Q's about Zorro
Keywords: Zorro, clock, synchronizing
Message-ID: <3155@uniol.UUCP>
Date: 25 Jul 90 11:38:56 GMT
Distribution: comp
Organization: University of Oldenburg, W-Germany
Lines: 39

Hi guys,

here is couple of questions from a friend of mine. If you don't understand
them (I'm no hardware freak, so I can't help), feel free to mail me
and I will ask him. Here it goes:

1) How can you synchronize the states of the processor clock s0 - s7
   to a stable clock system on the Zorro II slot ?
   Is it possible to identify one of these states to make a synchronization
   of bus cycles on the Zorro II slot (only in the $200000-$9fffff range) ?

2) Does the system assert for its own a wait state to the Zorro II bus,
   or is every cycle closed to another ?

3) Is there a simple way to make a DRAM operation starting at the rising
   edge on s4 and ending at the rising edge of s0 ?
   Is it also possible to make a refresh cycle in a cycle starting with
   the rising edge on s0 and the falling edge on s3 ?

4) Which clock is the best to make a refresh clock with 64 KHz ?
   (I want to divide up the E-clock on pin 50)

5) How do I handle the 32 address and data lines on a Zorro III slot ?

6) Is it a good idea having several autoconfig's ON ONE BOARD ?
   (bit 4 on the autoconfig-address $00/$02 being set on the first config
   and the last (the second) being returned to the system ?

Well, that's it. Quite hard things I suppose, 'cause I didn't understand
a single of these. As I said, if there are questions, mail me, and I will
forward the questions to him... but do so quickly, as I will not be
at my terminal for a couple of weeks after Friday (time for vacations! :))

ANY help appreciated, and thanks in advance,

Frank 'F.N.II(tm)'
-- 
+ Frank Neumann, Hauptstr. 107, 2900 Oldenburg, FRG   The Amiga is it. +
+ neumann@uniol.uucp  ZER:neumann@uniol.zer  InHouse: amigo@faramir    +