Greg, from Arcadeshopper, sells the USB Nabu cable that you use to connect the Nabu to a laptop or desktop running the server software
The cable is $40complete with the dtech USB to rs422 adapter and the db9 to 5 pin din
1000 percent..
There is a server online with MSX / COLECO ported games as well as CP/m
The server runs off of a modern PC and connects via a rs422 adapter
https://nabu.ca/
Launching TeleTerm 7 from hard drive and display the RETROCAMPUS. COM BBS on an external 80 column using a Heathkit h19 attached to a MIB238 serial card
If you get an Aquarius you should consider Jaybirds AquaCart
it has most of the original software on a single menu driven cartridge
I have on of those as well as his ram expanders