page_title: WordStar
section_title: MS-DOS
hierarchical_section_title: WordStar / History / MS-DOS
caption_attribution_description: Deutsch: Screenshot von WordStar 3.0
context_page_description: WordStar is a word processor application for microcomputers. It dominated the market in the early and mid 1980s, succeeding the market leader Electric Pencil. It was published by MicroPro International, originally written for the CP/M-80 operating system, and later written also for MS-DOS and other 16-bit PC OSes. Seymour I. Rubinstein was the principal owner of the company, and Rob Barnaby was the sole author of the early versions of the program. Starting with WordStar 4.0, the program was built on new code written principally by Peter Mierau.
  WordStar was written with as few assumptions as possible about the operating system and machine hardware, allowing it to be easily ported across the many platforms that proliferated in the early 1980s. Because all of these versions had relatively similar commands and controls, users could move between platforms with equal ease. It was already popular when its inclusion with the Osborne 1 portable computer made the program the de facto standard for much of the small computer word-processing market.
context_section_description: WordStar 3.0, the first version for MS-DOS, appeared in April 1982. The DOS version was very similar to the original, and although the IBM PC had arrow keys and separate function keys, the traditional "WordStar diamond" and other Ctrl-key functions were retained, leading to rapid adoption by former CP/M users. WordStar's ability to use a "non-document" mode to create text files without formatting made it popular among programmers for writing code. Like the CP/M versions, the DOS WordStar was not explicitly designed for IBM PCs, but rather for any x86 machine (as there were a number of non-IBM-compatible PCs that used 8086 or 80186 CPUs). As such, it used only DOS's API calls and avoided any BIOS usage or direct hardware access. This carried with it an unfortunate performance penalty as everything had to be "double" processed (meaning that the DOS API functions would handle screen or keyboard I/O first and then pass them to the BIOS).
  The first DOS version of WordStar, demoed by Jim Fox and executed by a team of Irish programmers in April 1982, was a port of the CP/M-86 version of WordStar, which in turn had been ported from the CP/M-80 version in September 1981. This had been started by Diane Hajicek and was completed by an Irish team of programmers under ISIS-II, probably using Intel's source-to-source translator CONV86. Thus the main program executable was a .COM file which could only access 64 kB of memory. Users quickly learned they could make WordStar run dramatically faster by installing a RAM disk board, and copying the WordStar program files into it. WordStar would still access the "disk" repeatedly, but the far faster access of the RAM drive compared to a floppy disk yielded a substantial speed improvement. However, edited versions of a document were "saved" only to this RAM disk, and had to be copied to physical media before rebooting.
  InfoWorld described WordStar as "notorious for its complexity", but by 1983 it was the leading word processing system. Although competition appeared early (the first version of WordPerfect debuted in 1982 and Microsoft Word in 1983), WordStar was the dominant word processor on x86 machines until 1985. It was part of the software bundle that accompanied Kaypro computers.
  At that time, the evolution from CP/M to MS-DOS, with an "Alt" key, had taken place. WordStar had until then never successfully exploited the MS-DOS keyboard, and that is one explanation for its demise.
  By that point, MicroPro had dropped the generic MS-DOS WordStar and version 4.0 was exclusively for IBM compatibles. (IBM compatibles differed from MS-DOS compatible programs in the addresses assigned to its screen data.) It was the first version of WordStar supporting directories—a feature nearly mandatory to be usable on machines with hard disks. Also introduced were simple macros (shorthand) and the install program was completely updated to include features like reprogramming function keys and an extensive printer support. During the second half of the 1980s, the fully modernized WordPerfect overtook it in sales.
  WordStar 5 (released in 1989) added footnote and endnote capability and a fairly advanced Page preview function. Versions 5.5 and 6 had added features, and version 7 (released 1991) included a complete macro language as well as support for over 500 printers. It also featured style sheets and mouse support.
caption: WordStar 3 under CP/M
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