How to implement a 16-bit byte flip/swap through hardware

[Nipedley]

Hey guys, again not sure where to put this but I guess it seems most appropriate here. I came here before asking how to implement this in software as part of a project, and successfully made a custom cartridge that would play converted megadrive roms on a mega-tech machine. Now I want to take it further, and build a converter cartridge. (Play megadrive games directly on a mega-tech machine)

The only issue I have with it, is that the megatech pcb expects a rom that has been 16-bit byte flipped/swapped and the megadrive rom hasnt been. I did some electronics a few years ago and suspect my answer may be in logic gates or a chained series of D-Type flip-flops, but need someone a little more savvy.

Basically, how do I 16-bit byte flip/swap address lines through hardware rather than software means.

Any answer gets a cookie

[EwJ]

42

Where's my cookie?

[Nipedley]

Here you go I quite fancy one now actually.

If a mod thinks this may be better suited / get more replies elsewhere please feel free to move it. I sure hope I can find an easy way to do this!

[Nipedley]

Just so you guys know, this isn't a problem anymore as I've had a few breakthroughs on this project today.

Full megatech & megadrive cart pinouts are now available on my site to anyone hoping to produce a converter, all you have to do is match the wires

It's up to you how to house the electronics for this project, I'm using a sonic & knuckles as a donor for the cart slot on top and to house the rest of it. Once I've built this the appropriate plans & information will be put up on my website alongside the basic info you need to produce this, which is already there.

http://www.nipedley.net/web/projects/megatech