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Jim Fetzner SuperCart PCB


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Tonight I built a 32k SuperCart using Jim Fetzner's PCB.

 

I must say it definitely is a great design to just solder the required components on the board without having to cannibalize a previous cart. I purchased all my components from Jameco and was able to build the cart for cheap and now I have a 32k supercart (4 banks total).

 

The only part you have to get if you do not have is the Editor Assembler GROM.

 

The hardest part is getting the holes drilled right for the switches.

 

There some good programs out there for the supercart!

 

 

 

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Tonight I built a 32k SuperCart using Jim Fetzner's PCB.

 

I must say it definitely is a great design to just solder the required components on the board without having to cannibalize a previous cart. I purchased all my components from Jameco and was able to build the cart for cheap and now I have a 32k supercart (4 banks total).

 

The only part you have to get if you do not have is the Editor Assembler GROM.

 

The hardest part is getting the holes drilled right for the switches.

 

There some good programs out there for the supercart!

 

 

 

 

Pictures!

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Bare board...

 

Your resistors, battery clip, LED, sockets can all be sourced from one place? (Jameco)

 

Yes i sourced them all from Jameco.com

 

I check with Jim for the 43256 to make sure the one I chose was compatible and it was. The model I chose for the 43256 RAM chip is:

 

43256-10L

Jameco part #: 41970 Click Here To View

 

I can post a list of all the jameco part numbers I purchased for this project if anyone wants it.

Edited by Cschneider
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Here is what I purchased from Jameco to build the cart

 

Qty Part Number Description
1 33486 .1 uF 35v Tantalum Capacitor
1 33736 2.2 uF 35v Tantalum Capacitor
1 41970 43256-10L SRAM
3 690865 1k OHM 1/4 watt resistor
2 691024 4.7k OHM 1/4 watt resistor
1 691307 68 OHM 1/4 watt resistor
2 36311 1N914 diode
2 2180834 Toggle Switch SPST, ON-NON-OFF
1 355434 CR2032 Battery Holder
1 40301 28-Pin Dual Wipe Low Profile IC Socket
1 112222 IC Socket 16-Pin Dual Wipe Low Profile
1 333227 LED Uni-Color Green 565nm 2-Pin T-1 3/4
1 14162 CR2032 Lithium Battery 3V 225mAh
I spent less than $15.00 US for the parts, another $10 for the PCB to make a 32k SuperCart. I think that's a hell of of a deal.
Hope this helps anyone else that's going to make one.
Also, I noticed that the cartridge cases can be a bit brittle and soft when drilling the holes for the switches. I made a 1/8 hole first then I used a dremel to cut out the rest of the holes for the switches.

 

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Jim, this board and overall design looks dissimilar to a SuperCart I had a few years back.

 

Mine did not have two switches or a light.

 

Do you have a link to some more info on this project?

 

I believe the original concept for this board was taken from the mainbyte.com website:

 

LINK

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It is based on the Mainbyte Supercart modifications to a TI circuit card. I just decided that it would be a lot easier if the chips could be socketed (difficult in the original design) and if there were no trace cuts needed to build a functional cartridge. I used those insights to design a layout that met all of those design goals and this board is the result. I was pleasantly surprised that so many folks have decided to build one--I only had 40 of the bare boards made for the initial run, and didn't expect to ever run out of them--but now there are only three bare boards left on the Arcadeshopper site, so I may need to make some more of them.

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I'd like to build another one of these myself, as my current cart is only a one bank model. I'd like to make a few tweaks...

 

1) Replace the two toggle switches with a single switch.

I'd prefer a slider type, does anyone know of an appropriate source for such a switch?

 

2) Modify the cartridge to allow the larger switch.

I'm thinking I'd have to cut a couple of cartridges, glue the pieces, sand it all down, then paint the cartridge black again.

 

3) Design and print a cool and larger control panel/label.

 

4) Figure out a way to have multiple LED's to show which bank is active.

 

 

post-35324-0-74717100-1435377682_thumb.jpg

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Yeah, I looked up some 2P4T sliders. There were some real nice PCB mounting ones that would have been perfect... if only the board had been designed to mount them, I would not need to modify a case.

 

How would you slide the switch without outside access through a case mod?

 

...lee

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