Incredible Add-On Device Turns TS1000, ZX81 and PC8300 Into Versatile and User Friendly Computers Authors Gerd Breunung Publication ZX-Appeal Publication Details Date December 1987 Pages 7 Read the article See all articles from ZX-Appeal Dec 87 Review of Weymil’s Delta Device, a 32K non-volatile RAM extension. Products Downloadable Media Related Articles Tags ZX-Appeal, Hardware review, PC8300, TS 1000, Weymil Corporation People Gerd Breunung