Unfortuantely the Alltek board is locked down, you're stuck with what is on it. (And I've heard rumors that he's against modifying his image to include other revisions.)

The NVRAM, barakandl 's board, freakin' ROCKS, and I highly recommend it. It CAN be switched out to run one of these custom ROMsets, PLUS give folks like slochar here extra space to add code and not be limited by the 4x 2716 address space!

You need to do some image juggling - it's not as real simple as joining the images together as is it makin' a 2764. Weebly's give the full address range to the EPROM, so you need to arrange the locations of the chips inline with the expected addresses.

Once I get the site up to host the modded ROMs, I'll have Weebly-compatible ones posted.

I've been using them in my GQ-4X without issue. Nice and quick. And they work in the Weebly board, too.

Good to know, I stand corrected. The commented I heard (a while ago now) was different.

As someone who still pays for his games - at home - I enjoy the sound of dropping a coin in.

This is kinda amazing. Wonder if it was taken out for cost purposes. Since code's there, it means at some point someone said, 'Yeah, we'll wire the knocker up toJ2-2.