Sharp MZ

That looks interesting. Keep us updated.

What is an "AS400 FloppyDrive" in this context? The only thing Google turns up when I search for it are the IBM MidRange machines. Somehow I doubt that theyr are relevant here ...

Interesting. I have a SiDi (more like a MiST / Mistica than a MiSTer), so it would be nice if a future version could run on different hardware models.

Well, then you also need to check the code in the MZ-1E05 eprom, and figure out:
- where in the address map does it live?
- are the routines in there compatible with the MZ80B ROM routines?
So just more work for you, I'm afraid.

There are several "layers" of compatibility requirements, like (this is not an exhaustive list): - mechanical - does the card physically fit into the connector on the machine? - electrical / signals - does the machine have the signals that the card requires (and vice versa) on the correct ...

No, I'm going to make my own PCB for the adapter (mz-700 bus to mz-800 unicard).

These are the connectors I ordered (50 pin version) https://www.aliexpress.com/item/33029458127.html

Thanks. I found some similar connectors on Aliexpress and have ordered. I shall see when they arrive if they fit or not.

Thanks!

I see. Are you using the same connectors for both ends? (It looks like that on your picture).
Do you have a part number or a source for these connectors?