shoestring

I don't sell them. But you can download them for free from Jammarcade downloads section then program your own EPROM.

What did you replace on the top board ? You may have blown or shorted some caps if you're hearing hum. Did you replace the audio amplifier ?

Hi, I have a Track and Field and a hyper Sports and I am interested in the test ROMs you were working on. Do you sell them?
My Hyper Sports has the typical sound problem with Hum constant, no sounds what so ever from game board but the game does play. HUM/ringing can be turned up or down with the pot. I did have a bad power supply that ran dirty +12V into the game board so I suspect that is an issue. I have replaced a ton of parts on that top board but stil;l not solving the issue. Anyways, I'd be really interested in your input. If I need to start or add to a thread I can. I do have a logic probe, sound tracer, and I can solder etc.
Thanks for your time,
Tim