Re: screwy Asteroids problem (running in Asteroids Deluxe cabinet)

Scott, those adaptors like interesting. I'd also like to play Asteroids
in my
AD cabaret cabinet. :)

I've been holding onto this Asteroids PCB thinking Clay will some day
complete
his promised A/AD/LL multi-game.

Scott C.

Scott Brasington wrote:

>Pins 19 (X) and 16 (Y) control video inversion. There is no
>way to control them via software unless you want to mod the
>board. Asteroids only uses pin 19 to invert *BOTH* X and Y.
>Very early asteroids boards did not have any video inversion support.
>Cocktail is implemented by looping back the P2out signal which is
>tied to the Bank RAMSEL circuit when Player 2 is active.
>DLX upright mirror cabinet will ground pin 19 (X), which has the
>affect of inverting both X and Y when an asteroids board is plugged
>in to a DLX upright mirror cabinet (which leaves it with
>the Y backwards in reference to the mirror). Hope that helps.
>
>FWIW, I ran some proto adapters a few weeks ago that are
>pure plug and play for ast/dlx including video inversion
>circuit, audio amp impedance matching (AR vs. ARI/II), and
>input signals swapped. I have not had anytime to test
>out the audio stuff yet, but the X flip and input swaps
>works fine. I myself have only a DLX cabinet and having
>a plug and play way to change boards will be a great helper.
>Now that I'm back from vacation hopefully I'll have some
>time to catch up on arcade things again. My kids are wearing
>me out, glad they will be returning to school!
>
>-Scott
>
>
>Mark Shostak wrote:
>
>
>>Good deduction; I have a cabaret.
>>
>>Two comments:
>>
>>1 - With regard to your problem, it doesn't sound like a side effect of the
>>s/w changes, nor your wiring changes. I would start by putting the original
>>roms back in, and see if you still have the problem.
>>
>>2 - Some of the games used jumpers on the edge connector to configure the
>>inverters. I don't recall if A/AD does, but a quick look at the schematics
>>would answer that. If so, it's a h/w problem.
>>
>>If the inverters are controlled by s/w, it wouldn't take a rocket scientist
>>to add a line or two to properly initialize the inverters for the appropriate
>>cabinet type. Check out the schematics and let us know, then we'll be
>>more motivated to give you a patch to try. :-)
>>
>>-Mark
>>
>>P.S. Scott B. is probably the premier Asteroids/AD expert these days,
>>he may be able to tell you off the top of his head, followed by Neil...
>>
>>
>>
>>On Sun, Apr 02, 2006 at 01:52:07PM -0500, joemagiera wrote:
>>
>>
>>
>>>This is a screwy problem, and it's screwy to describle, but it's driving me
>>>crazy, so please bear with me, I'll describe it as best I can.
>>>
>>>I'm running Asteroids in a standard Asteroids Deluxe upright. I'm using the
>>>ROMs hacked by Mark Shostak as mentioned here:
>>>http://www.ionpool.net/arcade/asteroids/asteroids_mod.txt. These hacked
>>>ROMs fix everything except the inverted image as Asteroids Deluxe uses the
>>>mirror. (FYI, Mark's ROMs will work without further modification in an
>>>Asteroids Deluxe cabaret as that doesn't use a mirror). To fix the mirror
>>>inverted image problem, I swaped the red & blue wires running from the
>>>monitor deflection board to the yoke.
>>>
>>>My problem is that the game will randomly switch the image to upside down.
>>>That is upside down when you're looking at the corrected inverted image on
>>>an AD cabinet. It doesn't happen often, it happened 3 times yesterday
>>>during a 5 hour game party, once in the middle of a game. It's hard to trap
>>>on a pic, but here's an attempt:
>>>
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>>>
>>>
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>>
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>
>
>

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Received on Tue Apr 4 08:19:23 2006