Andrew Fisher (697) on 5/7/2023 5:42 AM · Permalink · Report

Jabbertalky in 80 Microcomputing Nov. '81 under "New Products", maybe a delay between the 1980 patent and the release. Cassette/disk for TRS-80 and Apple II.

https://archive.org/details/80-microcomputing-magazine-1981-11/page/n98/mode/1up?q=Jabbertalky