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CP/M-86 was a version of the CP/M operating system that Digital Research made for the Intel 8086 and Intel 8088. CP/M (Control Program for Microcomputers is an Operating system originally created for Intel 8080 / 85 based Microcomputers by Gary Kildall Digital Research Inc (aka DR or DRI; originally Intergalactic Digital Research) was the company created by Dr The 8086 is a 16-bit Microprocessor chip designed by Intel and introduced on the market in 1978 which gave rise to the X86 architecture The Intel 8088 is an Intel X86 Microprocessor based on the 8086, with 16- Bit registers and an 8-bit external Data bus The commands are those of CP/M-80. Executable files used the relocatable .CMD file format. In CP/M-86, CMD is the Filename extension used by Executable programs It was later reworked to become MS-DOS compatible and renamed to DR-DOS. MS-DOS (short for M icro' s' oft D isk O perating S ystem is an Operating system commercialized by Microsoft. DR-DOS is a DOS -type Operating system for IBM PC - compatible Personal computers, originally developed by Gary Kildall

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CP/M-86 and the IBM PC

When IBM contacted other companies to obtain components for the IBM PC, the as-yet unreleased CP/M-86 was its first choice for an operating system because CP/M had the most applications at the time. International Business Machines Corporation abbreviated IBM and nicknamed "Big Blue", is a multinational Computer Technology Negotiations between Digital Research and IBM quickly deteriorated over IBM's non-disclosure agreement and its insistence on a one-time fee rather than DRI's usual royalty licensing plan. A non-disclosure agreement (NDA also known as a confidentiality agreement, confidential disclosure agreement (CDA proprietary information agreement Royalties (sometimes running royalties) are usage-based payments made by one party (the "licensee" to another (the "licensor" for ongoing use of an [1] After discussions with Microsoft, IBM decided to use 86-DOS (QDOS), a CP/M-like operating system that a Seattle area computer company had made for its own hardware. Microsoft Corporation is an American multinational Computer technology Corporation, which rose to dominate the Home computer 86-DOS was an operating system developed and marketed by Seattle Computer Products for its Intel 8086 -based computer kit Microsoft adapted 86-DOS for the PC hardware and IBM shipped it as PC-DOS. IBM PC-DOS is a DOS operating system for the IBM Personal Computer, sold throughout the 1980s and 1990s

After learning about the deal, Digital Research founder Gary Kildall threatened to sue IBM for infringing DRI's intellectual property, and IBM agreed to offer CP/M-86 on the PC to settle the claim. Gary Arlen Kildall (May 19 1942 – July 11 1994 was an American Computer scientist and Microcomputer Entrepreneur who created the CP/M Intellectual property ( IP) is a legal field that refers to creations of the mind such as musical literary and artistic works inventions and symbols names CP/M-86 was released a few months after the PC and was one of three operating systems a customer could buy from IBM. At $240 per copy it sold poorly compared to the $40 PC-DOS. Kildall would later accuse IBM of setting the prices to marginalize him, but the accounts of Microsoft, IBM, and other DRI executives indicate that Kildall had demanded a substantial royalty for CP/M-86 while Microsoft had accepted a fixed sum. Customers rapidly adopted the PC platform with PC-DOS as the new industry standard, and opportunities for DRI to license CP/M-86 to other customers dwindled.

Versions

A given version of CP/M-86 will have two version numbers. One applies to the whole system and is usually displayed at startup; the other applies to the BDOS kernel. In Computer science, the kernel is the central component of most computer Operating systems (OS Versions known to exist include:

It is believed that the various Personal CP/M-86 versions were based on an unreleased product known as CP/M-86 Plus; all known Personal CP/M-86 versions contain this string.

See also

References

  1. ^ Freiberger, Paul; and Michael Swaine [1984] (2000). The history of computing hardware starting at 1960 is marked by the conversion from Vacuum tube to solid state devices such as the Transistor and later Fire in the Valley: The Making of the Personal Computer, 2nd edition, New York: McGraw-Hill, pp. 332-333. ISBN 0-07-135892-7.  

External links

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