-----Original Message-----
From: "Bert Ankrom" <BEAnkrom@traskbritt.com>
To: <vectorlist@synthcom.com>
Date: Thu, 22 Aug 2002 14:15:39 -0600
Subject: TECH:VECTOR: Two Lunar Lander issues no y or z out & a "resetting"
issue.
> Hello,
>
>
>
> I thought it was time for me to actually join this list since I have 3 vector
games that always seem to need one thing or another. I spent a several hours
over the weekend going through the list archives and I was very impressed with
the knowledge base of the people here and the intelligent thought provoking
discussions with minimal flaming. I have grown slightly weary of RGVAC and all
the FS/FT, flame wars and general BS etc. I look forward to participating where
appropriate with this group.
>
>
>
> I've been collecting for about 6 years so I've been around the block with
some minor board and monitor issues (edge connectors reseating sockets,
replacing sockets, burning eproms, cap kits etc.), but as yet I haven't done
anything along the lines of logic troubleshooting. That brings me to this
point... requesting some help.
>
>
Your games do not have to go wrong for you to join this group :-)
1st off, you should modify the AR pcb to remove the regulator-feedback circuit.
[ANDY WELBURN - feel free to jump in here.]
the problem you describe sounds familiar,
look at the vector command stack.
in a vector game commands are placed in a stack until they can be processed.
the self-test dont use many commands, so the stack is not fully used.
in gameplay however - the stack is used fully, and then the faults can show up.
think of it like a cach, the cpu places the commands to draw the vectors in it,
and the vector engine reads them out whenever it has time.
c.u.
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Received on Fri Aug 23 00:01:58 2002
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