Re: _Tollian's Web_ board

If I recall the alpha cpu reset is the same as any other
Atari vector. Reset is on board (not external). If reset is
stuck low (and not pulsing due wdog timeouts), you probably
have no clock. Did the crystal get knocked off the board?

The other (gamma) cpu's reset, I believe is under control
of the alpha cpu. If alpha's down, gamma won't even consider
operating.

Use the MH schematics on spies.

-Mark

----------
From: Matt J. McCullar <mccullar@flash.net>
To: vectorlist@synthcom.com
Subject: VECTOR: _Tollian's Web_ board
Date: Saturday, September 09, 2000 2:08 PM

        Hey, group! I've got a question for everyone.

        I've got a board for a game called "Tollian's Web," which I'm told was a
prototype that was never released into general circulation. It's a color X/Y game by
Atari, and I'm also told that it kinda fits into a _Major Havoc_ cabinet. I've never
played either game and I have no schematics, so I don't know for sure.

        This board has TWO 6502 microprocessors on it, and pin 40 on both of them is
stuck low. This is the main *RESET line, which is an active-low signal. As long as it
stays low, the processors won't start. These *RESET lines are not connected together and
are generated indepedently from other chips.

        My question is this: Does this board expect to get a master reset pulse from
another hardware source, such as the game's power supply?

        Thanks!

        Matt J. McCullar

        Arlington, TX

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Sat Sep 9 13:47:11 2000