I saw one of those running Cromix. It was being sold in Brazil as if it were a local machine by Brascom called BR-1000[1]. They called the OS "BR1000" as well. Some students were trying some examples from the manual and they weren't working. I suggested they replace all calls to br1000() with cromix() and that did the trick.

Another Z80/68K machine was the TRS-80 Model 16[2]. The Sega Genesis[3] (or Mega Drive) was another case of these two processors paired together.

[1] https://www.old-computers.com/museum/computer.asp?st=1&c=533

[2] https://www.old-computers.com/museum/computer.asp?st=1&c=242

[3] https://en.wikipedia.org/wiki/Sega_Genesis