Posts tagged with “Keyline Computer Products”


The E/RAM was a high-resolution add-on for the TRS‑80 Model I. Introduced in 1980 for a price of $349.95, the E/RAM was designed and manufactured by Keyline Computer Products from Tulsa, Oklahoma. It was sold by Vern Street Products, also in Tulsa.

The E/RAM (an acronym for Extended Random Access Memory) contained 6K of video memory. It increased the TRS‑80 graphics resolution to 256 by 192, with the high-resolution graphics overlaying the text screen.