Posts tagged with “Vernon Hester”


MULTIDOS was one of the major TRS‑80 operating systems, described in advertisements as “the most compatible, user friendly operating system on the market.” It was written by Vernon Hester, the author of ULTRADOS, and was in some ways a continuation of that operating system. MULTIDOS was the least expensive TRS‑80 operating system and also the one with the most recent update (MULTIDOS 5.1 in 2005).


ULTRADOS was the first TRS‑80 operating system written by Vernon Hester. Introduced in September 1980, ULTRADOS was sold by Level IV Products, a software and hardware retailer based in Michigan. The regular price for ULTRADOS was $119.95 but the introductory price of $89.95 lasted for several months. ULTRADOS was for the Model I only; there never was a Model III version.

Originally called Level IV DOS, ULTRADOS began life as a heavily patched version of Model I TRSDOS.

An Interview With J. Weaver Jr.

J. Weaver Jr. is the author of the TRS‑80 games Outhouse, Chicken, Rally, Vexus, Planetbuster, Yield, and Pulsar. In this interview, conducted in October 2008, I had the opportunity to ask him some questions about his games and his memories of the TRS‑80.