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Tried them again today after giving them 3 rounds in the eraser yesterday and still they refuse to program.

popped them in the other socket and still nothing. They give me errors the instant I...

I'm using the standard green 16bit Sivava adaptor. It has a 42 dip socket to the left and a 40 dip socket on the right. 160's and 322's have worked fine with it so far.

I have only tried them in...

Can't program them at all.

As soon as I try to program they just give me errors. I'll try erasing them for a longer time, I'll put them in my UV eraser for a few rounds later and try them again.
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I'm trying to make MUSHA, and have been trying all day to get a 27c400 to program. No luck.

What chips did you use for 512kb games? I'm using AM27c400 chips.

Maybe the chips are bad, or...

Yep, the programmer is complete junk and so is the software.
I bought the Willem as it was the only programmer I could find that had a 16-bit 42dip adaptor. I usually use my Genius G540 for...

Well thats a switch. I'm that used to padding roms for NES and SNES I thought Gen games would need padding also.

Thanks for your help, dude.

Having some problems programming 27c322 chips....

Ah nice, Good to know.

Is it best pad out a rom to fill out the Eprom?

Looking at Panorama Cotton which is 2.5MB, should I pad it to 4MB to fill a 27C322, or does it not matter?

Great stuff. That also makes hunting for donor carts much easier too:D

Do Genesis roms not have any headers that need removing before programming like SNES roms?
Does it matter what format the...

I assumed as much. Just thought I would ask before I go ahead with it.

Thanks for the link to the console mod, looks very simple to do.

Does the region of a rom have to match that of the donor cart to work?

For instance, would there be any issues with using an NTSC rom with a PAL donor cart?

I was going to make Pulseman (NTSC...