Larken disk interface and Kempston joystick both use port 31.
Diskdriving with a Joystick AuthorsRenato ZannesePublicationSinc-LinkPub DetailsSinc-Link v6 n1Volume: 6 Issue: 1DateJanuary/February 1988Pages9Read the articleSee all articles from Sinc-Link v6 n1 Larken disk interface and Kempston joystick both use port 31. TagsLARKEN Electronics TS 2068 PeopleRenato Zannese