How to "burn" 2600 games?

[flammingcowz]

I had a Defender cart that had graphics glitches, so I took it apart and are wondering if I can re-use this to put a homebrew game on it. Any links to guides on homemade eprom burners? Also, are all Atari games this small? It only took up a small portion of the cartridge case!

 

Edit: I tried taking a pic of the small board, but the flash from the camera made it invisible

Edited July 25, 2009 by flammingcowz

[e5frog]

I had a Defender cart that had graphics glitches, so I took it apart and are wondering if I can re-use this to put a homebrew game on it. Any links to guides on homemade eprom burners? Also, are all Atari games this small? It only took up a small portion of the cartridge case!

 

Edit: I tried taking a pic of the small board, but the flash from the camera made it invisible

 

 

You can get a Willem eprom programmer pretty cheap from eBay, probably easier than building one yourself. Then it's fully possible to replace the rom with an eprom.

[Wickeycolumbus]

I had a Defender cart that had graphics glitches, so I took it apart and are wondering if I can re-use this to put a homebrew game on it. Any links to guides on homemade eprom burners? Also, are all Atari games this small? It only took up a small portion of the cartridge case!

 

Edit: I tried taking a pic of the small board, but the flash from the camera made it invisible

 

 

You can get a Willem eprom programmer pretty cheap from eBay, probably easier than building one yourself. Then it's fully possible to replace the rom with an eprom.

 

I would not recommend the Willem, it will not program older chips (2732, 2764, ect...) without an extensive mod. I have one of these and couldn't be happier. They are quite a bit more expensive, but they get the job done

[e5frog]

I think it will be hard to find old chips to program, but sure if you can, go for a programmer that supports them.

[e5frog]

Here's one you can build yourself - for Atari:

http://www.atarimagazines.com/v4n8/EPROMBurner.html

 

Here are 2716:s:

http://cgi.ebay.com/EPROM-2716-SET-OF-10-S...id=p3286.c0.m14

 

You also need a UV-C lamp to erase the eproms...

 

 

Probably easier and cheaper to get a Willem programmer and a flash prom (29c256/512...) you could for example pull a bios chip if you have a PC motherboard left over.

 

Willem-programmer here:

http://cgi.ebay.com/NEWEST-Willem-EPROM-Pr...id=p3286.c0.m14

$29.95

 

It supports 27c64, just program the lower half and connect the highest adress-pin to gnd for "2732-operation" - the pinout is the as close the same as is possible.

 

Pinout for 27c64 here:

http://www.faime.demon.co.uk/retro/2364.html

 

2732 here:

http://www.tunercat.com/tnr_desc/eprom_pin/eprom_pins.html

There are also pinout of larger eproms - same principle there program the first 2k or 4k or 8k and ground the adress-pins that are not needed.

 

You could even put several games on one chip and swap between them with jumpers if you like to.

Edited August 1, 2009 by e5frog

[+batari]

I had a Defender cart that had graphics glitches, so I took it apart and are wondering if I can re-use this to put a homebrew game on it. Any links to guides on homemade eprom burners? Also, are all Atari games this small? It only took up a small portion of the cartridge case!

 

Edit: I tried taking a pic of the small board, but the flash from the camera made it invisible

 

 

You can get a Willem eprom programmer pretty cheap from eBay, probably easier than building one yourself. Then it's fully possible to replace the rom with an eprom.

It's not a direct replacement.

 

Some boards have a pinout resembling a 2532 EPROM, while others resemble a 2732. Since 2532 EPROMs are difficult to find, it's better to use the boards with 2732 pinout. You can modify the 2532-like boards by cutting traces and soldering wires but it's a pain.

 

Also, the chip select line on the ROM is active high, while the EPROM is active low, so you need to hack an inverter onto the board.

[e5frog]

This guy seems just to want to repair his Defender cart, perhaps someone that has the equipment could simply burn the appropriate prom and send it to him.

 

If you need an inverter and don't want to use a whole logic circuit it can be achieved with a transistor and two resistors:

 

Depending on the transistor the resistor at the base could be 10kohm and the other 1kohm if using a 2N2222 for example.

 

It will require about half the soldering of a 74xx circuit.

Edited August 1, 2009 by e5frog

[+batari]

This guy seems just to want to repair his Defender cart, perhaps someone that has the equipment could simply burn the appropriate prom and send it to him.

 

If you need an inverter and don't want to use a whole logic circuit it can be achieved with a transistor and two resistors:

 

Depending on the transistor the resistor at the base could be 10kohm and the other 1kohm if using a 2N2222 for example.

 

It will require about half the soldering of a 74xx circuit.

Sorry, but that will not work. The collector will always be high (i.e. it will not pull low when the transistor is biased.) The resistor needs to be moved from the emitter to the collector of the transistor is that is going to work.

 

A better setup is a MOSFET rather than a BJT as that only needs a single resistor.

Edited August 1, 2009 by batari

[e5frog]

Sorry, took the first picture I found and didn't think about it, like this instead then:

 

 

 

Not that I think he'll use either this nor your suggestion.

 

[disjaukifa]

I had a Defender cart that had graphics glitches, so I took it apart and are wondering if I can re-use this to put a homebrew game on it. Any links to guides on homemade eprom burners? Also, are all Atari games this small? It only took up a small portion of the cartridge case!

 

Edit: I tried taking a pic of the small board, but the flash from the camera made it invisible

 

 

You can get a Willem eprom programmer pretty cheap from eBay, probably easier than building one yourself. Then it's fully possible to replace the rom with an eprom.

 

Hey not to bring up an older thread but shouldn't this work? It says it can do 2732 chips:

Dual Power Willem Universal EPROM Programmer

 

I just don't see spending $100+ when I am going to need it for the 2732 chips. If someone know if this will work please respond. I don't see a reason for it not to work.

 

Thanks

Disjaukifa

[e5frog]

I got one of those and according to the programming-program it supports both 2716 and 2732 - so go right ahead.