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Phil Bennett
L'Emuchat
Reged: 04/20/04
Posts: 888
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Re: Midway V-Unit; How the heck do these pcbs communicate?
04/15/19 09:34 PM
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> I am considering adding rs232 ports to this driver to enable linking for this
> hardware. What I need to find out is if there is any special device/hardware/chip
> that makes these games communicate. Race Drivin uses a SCC68681 dual asynchronous
> reciever/transmitter (DUART) which I don't see something like this on a Midway V-Unit
> pcb.
>
> In fact...these V-Unit games have to use some form of DUART. I can prove this from a
> failed attempt to link two Cruis'n USAs with crap LCD monitors (game sends garbage
> data the other pcb(s) can't read). If only this wasn't missed.

Communication between two machines is through a parallel interface. See schematic sheet 18/25, or page 70 of this pdf:

http://arcarc.xmission.com/PDF_Arcade_Ma...1_Jan_1996).pdf






Entire thread
Subject Posted by Posted on
* Midway V-Unit; How the heck do these pcbs communicate? Hydreigon 04/09/19 03:35 AM
. * Re: Midway V-Unit; How the heck do these pcbs communicate? Phil Bennett  04/15/19 09:34 PM
. * Re: Midway V-Unit; How the heck do these pcbs communicate? Hydreigon  04/16/19 05:21 PM
. * Conclusion Hydreigon  06/07/19 04:16 AM

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