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A smaller version called HERO Jr. was released later. Heathkit intended it for the home market, and therefore made it less complex, and more self-contained. Like HERO 1, HERO Jr. has a 6808 processor, but only 2 kB of RAM. It has onboard speech synthesis, a Polaroid sonar range sensor, a light sensor, a sound sensor, and an optional infrared ...
HDOS is an early microcomputer operating system, originally written for the Heathkit H8 computer system and later also available for the Heathkit H89 and Zenith Z-89 computers. The author was Heath Company employee Gordon Letwin , who later was an early employee of Microsoft and lead architect of OS/2 .
After closing that business, the Heath Company continued with its products for education, and motion-sensor lighting controls. The lighting control business was sold around 2000. The company announced in 2011 that they were reentering the kit business after a 20-year hiatus but then filed for bankruptcy in 2012, [ 2 ] and under new ownership ...
The Zenith Z-89 is based on the Zilog Z80 microprocessor running at 2.048 MHz, and supports the HDOS and CP/M operating systems. The US$2295 Z-89 is integrated in a terminal-like enclosure with a non-detachable keyboard, 12-inch monochrome CRT with a 80x25 character screen, 48 KB RAM, and a 5.25" floppy disk drive.
Zenith Data Systems Corporation (ZDS) was an American computer systems manufacturing company active from 1979 to 1996.It was originally a division of the Zenith Radio Company (later Zenith Electronics), after they had purchased the Heath Company and, by extension, their Heathkit line of electronic kits and kit microcomputers, from Schlumberger in October 1979.
Similarly, the article notes: "DESA sold a large portion of the collection of legacy kit schematics and manuals in late 2008..." DESA never owned Heathkit, the "Heathkit-Zenith" trade name and motion-lighting control division was sold to DESA about 1998. Heathkit, not DESA, sold the manual collection to Mr. Peterson.
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