Re: Sega G08 coin details

Mark / all,
Thanks for the data.

I went ahead and built a 555timer circuit which works on my Sega:

555 Timer circuit and PCB licensed under TAPR/NCL Open Hardware License.
Simple thru Hole componets should allow most people to solder this project
over a evening. Timer circuit used to stimulate the coin circuits of a Sega
Star Trek Captain's Chair to enable "Free Play" - IE use the game without
quarters. This circuit should be flexible enough to work on most arcade
games. This circuit can be built for less than $23.
http://Pinball-Mods.com/blogs/?p=155

Could I have purchased the CoinUp circuit? sure... but its fun to exercise
the noodle every once and a while.

Let me know what you think.
John

-----Original Message-----
From: Mark Jenison
Sent: Thursday, December 29, 2011 6:50 AM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Sega G08 coin details

Looks like it's already been done...

http://www.onecircuit.com/node/41

Mentions specifiically it works for Sega vectors...

----- Original Message -----
From: "Zitt Zitterkopf" <zittware@hotmail.com>
To: <vectorlist@vectorlist.org>
Sent: Thursday, December 29, 2011 1:02 AM
Subject: VECTOR: Sega G08 coin details

I know Sega Star Trek has a freeplay rom hack available; however, at this
moment, VectorLabs isn't supplying freeplay roms with their devices. I
haven't spent enough time with the multi-vector boardset to determine how
easy/hard it would be to convert to Freeplay.

I'll be taking my Star Trek Captain's Chair to Texas Pinball Festival this
year; so I'll need a free play method.

Right now I'm considering doing a 555timer circuit to "credit up" when the
start button is pressed.

Does anyone have any details on the coin detection circuit in the G08
designs?
I looked at the schematic and it appears there is a SR latch made out of
NAND gates which feeds another latch which drives XINT to the cpu.

I was wondering if anyone had some details on how long the "coin in" pulse
is so I can simulate it with a 555timer.

I can measure it myself; but am out of town at the moment. Sitting bored in
the hotel room which could be used for design rather than tv watching.

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Received on Fri Jan 6 02:47:54 2012