7800 that DOES NOT work with Supercharger, Robot tank, Decathon

[+batari]

I'm looking for a 7800 motherboard that has the infamous timing kludge circuit to "fix" 2600 Dark Chambers, but also does not work with Supercharger, Decathlon, Space Shuttle, Robot Tank, or the Cuttle Cart.

 

I have a working 7800 motherboard without the kludge that I am willing to trade straight across.

 

I want one of these "problem" 7800 motherboards so I can try to make the Harmony cart work on them with all games.

 

Please make sure your motherboard has the timing kludge before offering a trade. You will need to open up your 7800, take off the RF shield and look on the right side of the PCB. You need to have 4 ICs, and R66, C64 both present or you don't have the kludge.

 

This is a picture of a 7800 without the kludge and the one you'd be getting in trade. Note it has 3 ICs, no R66 or C64 and a 0 ohm resistor between two leads of the unpopulated IC footprint.

Edited July 13, 2009 by batari

[+GroovyBee]

Could you add the missing parts to yours to make it the same as the kludged version? Or is the problem more subtle than that?

[the.golden.ax]

I've got any version you like, if it ensures me a Harmony

 

AX

[+batari]

Could you add the missing parts to yours to make it the same as the kludged version? Or is the problem more subtle than that?

I think I could add the parts. The IC is a 74LS02, but I am not sure of the values of the cap and resistor. I figured it would be mutually beneficial to just trade someone, that way they get a "good" 7800 and I get a "bad" one without needing to mod either.

 

I've got any version you like, if it ensures me a Harmony

If all goes according to plan, everyone who wants a Harmony (and has the money) will get one.

[+GroovyBee]

he IC is a 74LS02, but I am not sure of the values of the cap and resistor.

There is some information on 7800 serial numbers with the kludge in the 7800 FAQ here :-

http://www.atariage.com/7800/faq/index.htm...mID=7800#cat3_3

 

Have you seen this page?

http://www94.pair.com/jsoper/7800_compat.html

No values on it mind .

[+batari]

he IC is a 74LS02, but I am not sure of the values of the cap and resistor.

There is some information on 7800 serial numbers with the kludge in the 7800 FAQ here :-

http://www.atariage.com/7800/faq/index.htm...mID=7800#cat3_3

Thanks. The one I have is an 001 Rev B board, and my Supercharger does work on it, contrary to the list above. I don't have Robot Tank or other Activision titles but they all work with a Harmony cart on this console (as do Supercharger titles.)

 

Hopefully someone out there has a console that doesn't work with a Supercharger and the FE Activision titles, and is willing to open it up and see if the timing circuit is present.

[the.golden.ax]

I do. But I don't want another system in return.

 

AX

[accousticguitar]

You need to have 4 ICs, and R66, C64 both present or you don't have the kludge.

What do you mean by "R66, C64?" I have one with 4 ICs, but I'm not sure about the rest.

[+batari]

You need to have 4 ICs, and R66, C64 both present or you don't have the kludge.

What do you mean by "R66, C64?" I have one with 4 ICs, but I'm not sure about the rest.

Those are the component names on the picture. I have highlighted them here as they may be hard to read on the original.

[+Mitch]

PM sent.

 

Mitch

[accousticguitar]

Mine has those too. It looks like Mitch has one for you, but if that doesn't work out for some reason send me a pm.

[+batari]

Thanks all, a deal has been made.