Researching, testing, andproving out such installations was a time-consuming andknowledge-intensive process, making WordStar installation andcustomization a staple discussion of CP/M users' groups during that time. Occasionally short machine-language programs had to beentered in a patch area in WordStar, to provide particular screeneffects or cope with particular printers. This was a fairly typical limitation of allCP/M programs of the time, since there was no mechanism to hide thecomplexities of the underlying hardware from the applicationprogram. Whilelater editions had more-or-less comprehensive installation programsthat allowed selection of printers and terminals from a menu, inthe very early releases, each of the escape sequences required for theterminal and printer had to be identified in the hardwaredocumentation, then hand-entered into reserved locations in theprogram memory image. Installation of early versions of WordStar, especially for CP/M,was very different from the approach of modern programs.
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