So in my stash of retro bits are these ROMBO units.
One is for Pc the other for Atari ST.
I have never used these and cannot even remember how i got them. Maybe they was in a retro job lot i brought in the late 2000's . Here are some pictures, they seem quite rare around Google but it looks like they made versions for the Amiga, Amstrad, spectrum etc.. too.
First released in about 1986, these cards list from around 1990.
Thanks for looking.😊👍