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Eight-bit computers running CP/M 80 were built around an Intel 8080/8085, Zilog Z80, or compatible CPU. CP/M 86 ran on the Intel 8086 and 8088. Some computers were suitable for CP/M as delivered. Others needed hardware modifications such as a memory expansion or modification, new boot ROMs, or the addition of a floppy disk drive.
CP/M, [3] originally standing for Control Program/Monitor [4] and later Control Program for Microcomputers, [5] [6] [7] is a mass-market operating system created in 1974 for Intel 8080/85-based microcomputers by Gary Kildall of Digital Research, Inc. CP/M is a disk operating system [8] and its purpose is to organize files on a magnetic storage medium, and to load and run programs stored on a disk.
Under OS/2 and Windows NT, the .CMD file extension is associated with batch scripts for their command processor CMD.EXE.Since binary code will not be executed this way, attempting to run CP/M-86 CMD files under the CMD command processor will not work, but typically only cause mild inconvenience to users.
CP/M-86 was one of three operating systems available from IBM, with PC DOS and UCSD p-System. [5] Digital Research's adaptation of CP/M-86 for the IBM PC was released six months after PC DOS in spring 1982, and porting applications from CP/M-80 to either operating system was about equally difficult. [6]
The Intertec SuperBrain was an all-in-one commercial microcomputer that was first sold by Intertec Data Systems Corporation of Columbia, South Carolina, USA in 1979.The machine ran the operating system CP/M and was somewhat unusual in that it used dual Z80 CPUs, the second being used as a disk controller.
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Windows Virtual PC entered public beta testing on April 30, 2009, [21] and was released alongside Windows 7 on July 22, 2009. [22] [23] Windows Virtual PC is available free of charge for certain editions of Windows 7, [3] either pre-installed by OEMs or via download from the Microsoft website. [1]
Gary Arlen Kildall (/ ˈ k ɪ l d ˌ ɔː l /; May 19, 1942 – July 11, 1994) was an American computer scientist and microcomputer entrepreneur. During the 1970s, Kildall created the CP/M operating system among other operating systems and programming tools, [5] and subsequently founded Digital Research, Inc. to market and sell his software products.