Infobox OS name HDOS logo screenshot caption developer Heath Company Gordon Letwin , Richard Musgrave source model Open source kernel type supported platforms Heath H 8 , Heath H89 , Zenith Z89 ui family released 1978 latest release version 3.02 latest release date latest test version latest test date marketing target programmed in prog language BASIC , Intel 8080 assembly language , COBOL , FORTRAN language English language English updatemodel package manager working state Historic license Public domain website HDOS is an early microcomputer operating system , originally written for the Heath H 8 computer system and later also available for the Heath H89 and Zenith Z89 computers. The author was Heathkit Heath Company employee Gordon Letwin , who later was an early employee of Microsoft and lead architect of OS 2 . HDOS originally came with a very limited set of system software tools, including an assembly language assembler , but commercial and freeware programs eventually became available for it. HDOS 2.0 is notable because it was one of the first microcomputer operating systems to use loadable device driver s to achieve a degree of device independence and extensibility. Versions HDOS 1.0 written in 1978 by J. Gordon Letwin HDOS 2.0 released in 1980, released into the public domain in April 1988 HDOS 3.0 released into the public domain in August 1986 HDOS 3.02 enhanced version by Richard Musgrave ref http www.computermuseum.li Testpage HeathDOS.htm HeathDOS ref See also Portal Free software Heathkit Zenith Data Systems List of operating systems References Reflist External links http www.computermuseum.li Testpage HeathDOS.htm HeathDOS http delivery.acm.org 10.1145 360000 358070 p188 pechura.pdf?key1 358070&key2 4479237511&coll &dl ACM&CFID 15151515&CFTOKEN 6184618 search 22Heath 20HDOS 22 Michael A. Pechuria, Comparing Two Microcomputer Operating Systems CP M and HDOS ... stub de HDOS es HDOS ru HDOS ... more details
SVG Summary logo fur Article Hot Dog on a Stick Use Infobox ADDITIONAL INFORMATION Used for Owner Website http www.hotdogonastick.com History Commentary OVERRIDE FIELDS Description Source Portion Low resolution Purpose Must be specified if Use is not Infobox Org Brand Product Replaceability other information From Flash intro at http www.hotdogonastick.com This image, hdos logo.jpg, is being linked here though the picture is subject to copyright I User Jonnny Jonnny feel it is covered by the U.S. fair use laws because it is a low resolution copy of a corporate logo linked solely for identification. Licensing Non free logo ... more details
16 KB memory card max addressable CP M 64 KB, HDOS 56 KB Display integral 12 monochrome CRT choice ... , external diskette drive connector Operating System HDOS , CP M , UCSD Pascal P System Pascal , or MP ... more details
that project a variety of special force field. The density of HDOS in a holographic surface is 400 per square centimeter, fed by an outlet eletroplasma medium power. Entire walls are covered with HDOS ..., by which an HDOS receive impulses, is similar to that which feeds smaller display panels, although ... of rooms. Besides the ability to project stereoscopic color images, HDOS manipulate the force fields ... HDOS, almost like a fly s eye operating in reverse. When the visitor moves the visible portions of HDOS ... more details
Unreferenced date August 2009 Originalresearch date August 2009 File Zenith Z 19 Terminal.jpg thumb Zenith Z 19 Terminal Zenith Data Systems ZDS was a division of Zenith Electronics Corporation Zenith founded in 1979 after Zenith acquired Heathkit , which had, in 1977, entered the personal computer market. Headquartered in Benton Harbor, Michigan, Zenith sold personal computers under both the Heath Zenith and Zenith Data Systems names. Zenith was an early partner with Microsoft, licensing all Microsoft languages for the Heath Zenith 8 bit computers. Conversely, Microsoft programmers of the early 80s did much of their work using Zenith Z 19 and Z 29 CRT display terminals hooked to central mainframe computers. The first H 8 Heathkit computer, sold in kit form, was built on an Intel 8080 processor. It ran K7 audio tape software, punched tape software with puncher reader H10 and HDOS Heath Disk Operating System software on 5 hard sectored floppy disks. The CP M operating system was adapted to all Heath Zenith computers, in 1979. Next, the early Heath Zenith computers H88 H89 and Z89 were based on the Z80 processors and ran either HDOS or CP M operating systems. Zenith introduced the revolutionary Z 100 computer Z 100 computer in mid 1981. Targeted for professionals, it had an S 100 bus , high performance color graphics, an 8 bit Z80 and a 16 bit Intel 8088 8088 processor. It ran MS DOS, but was not yet the PC compatible machine. In 1983 the United States Navy and United States Air Force Air Force awarded a joint contract to Zenith Data Systems to purchase 6000 Z 100 series computers, the first of many such major US government contracts to be won by Zenith. Later machines Z 150, Z 2xx, Z 3xx ... were IBM PC compatible. In 1986 the Army s United States Military Academy at West Point , New York issued computers for the first time to the class of 1990 using the Zenith 248 . Fourthclassman Plebe Doug Hall was telephone interviewed by a reporter from United Press Internationa ... more details
. ref name HDOS Cite web url http www.hotdogonastick.com aboutus.html title Hot Dog On A Stick accessdate 2008 07 03 publisher HDOS Enterprises work ref Preparation File Texas State Fair corny dogs.jpg ... more details
named HDOS, which was written by J. Gordon Letwin who later went to Microsoft to become ... near location 0, in particular the interrupt handler pointers. PAM8 and portions of HDOS used an unusual ... more details
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