Re: Z channel on Tempest?

Just to clarify, there isn't always a Z testpoint on colour game pcbs (i
forget which exactly), but you can always see where the Z output is routed
the the edge conencor pins.. if you look on the schems at the AVG or RGB
output sections, its always marked as going to an edge connector where you
can use it...

--
Andrew Welburn
http://www.andys-arcade.com
----- Original Message ----- 
From: "Christopher X. Candreva" <chris@westnet.com>
To: <vectorlist@vectorlist.org>
Sent: Monday, October 03, 2011 2:00 PM
Subject: Re: VECTOR: Z channel on Tempest?
On Sun, 2 Oct 2011, David Shoemaker wrote:
> When doing a BZ it is simple to hook up the z input of the scope to the
> intensity signal and get a pretty good picture.
>
> BUT of course on tempest there are 3 intensities. Has anyone ever come up
> with a nice simple circuit to build a unified intensity channel for this
> kind of use?
There is a Z testpoint on all Atari color vector games.
Because -- there is actually only intensity for all three colors.
Instead of three intensity levels, there is one level that is latched to the
color(s) that are active.
You can't have say 30% red and 60% blue. You set the level to 30%, and
activate red and blue. The Z testpoint just takes the intensity level before
any of the color latches.
==========================================================
Chris Candreva  -- chris@westnet.com -- (914) 948-3162
WestNet Internet Services of Westchester
http://www.westnet.com/
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