Control Program Facility

Control Program Facility (CPF)
DeveloperIBM
Written inPL/MI[1]
Working stateDiscontinued
Source modelClosed Source
Initial release1978; 46 years ago (1978)
Latest releaseRelease 8 / 14 November 1986; 37 years ago (1986-11-14)[2]
PlatformsIBM System/38
Default
user interface		Command-line interface
LicenseProprietary
Succeeded byOS/400

Control Program Facility (CPF) is the operating system of the IBM System/38.[3] CPF represented an independendent line of development at IBM Rochester, and was unrelated to the earlier and more widely used System Support Program operating system. CPF evolved into the OS/400 operating system, which was originally known as XPF (Extended CPF).[1]

While CPF is considered to be the operating system of the System/38, much of the hardware and resource management of the platform is implemented in the System/38's Horizontal and Vertical Microcode.[1][4]

  1. ^ a b c Frank G. Soltis (1997). Inside the AS/400, Second Edition. Duke Press. ISBN 978-1882419661.
  2. ^ "IBM SYSTEM/38 CONTROL PROGRAM FACILITY RELEASE 8 AVAILABLE WITH ENHANCEMENTS". IBM. 1986-10-07. Retrieved 2021-04-07.
  3. ^ IBM System/38 Technical Developments (PDF). IBM Product Design and Development, General Systems Division. 1980 [1978]. ISBN 0-933186-03-7. G580-0237-1.
  4. ^ Soltis, Frank (September 1981). "Design of a Small Business Data Processing System". IEEE Computer. 14: 77–93. doi:10.1109/C-M.1981.220610. S2CID 398484.