CP-67is ahypervisor,or Virtual Machine Monitor, fromIBMfor itsSystem/360 Model 67computer.
 | |
| Developer | IBMCambridge Scientific Center(CSC) |
|---|---|
| OS family | CP/CMS |
| Working state | Historic |
| Marketing target | IBM mainframecomputers |
| Available in | English |
| Platforms | IBM System/360-67 |
| Default user interface | Command-line interface |
| License | Proprietary |
| Preceded by | IBM CP-40 |
| Succeeded by | IBM CP-370 / VM/370 |
CP-67 is the control program portion ofCP/CMS,avirtual machineoperating system developed by IBM'sCambridge Scientific CenterinCambridge, Massachusetts.It was a reimplementation of their earlier research systemCP-40,which ran on a one-off customized S/360-40. CP-67 was later reimplemented (again) asCP-370,which IBM released asVM/370in 1972, whenvirtual memorywas added to theSystem/370series.[1]
CP and CMS are usually grouped together as a unit, but the "components are independent of each other. CP-67 can be used on an appropriate configuration without CMS, and CMS can be run on a properly configured System/360 as a single-user system without CP-67."[2]
Minimum hardware configuration
editThe minimum configuation for CP-67 is:[3]: p.1
- 2067 CPU, model 1 or 2
- 2365 Processor Storage model 1—262,144 bytes ofmagnetic core memorywith an access time of 750 ns (nanoseconds) per eight bytes.[4]
- IBM 1052printer/keyboard
- IBM 1403printer
- IBM 2540card read/punch
- ThreeIBM 2311disk storage units, 7.5 MB each, 22.5 MB total
- IBM 2400magnetic tape data storageunit
- IBM 270xTransmission Control unit
Installation
editDisks to be used by CP have to be formatted by astandalone utilitycalledFORMAT,loaded from tape orpunched cards.CP disks are formatted with fixed-length 829 byte records.
Following formatting, a second stand-alone utility,DIRECT,partitions the disk space between permanent (system and user files) and temporary (paging and spooling) space. DIRECT also creates the user directory identifying the virtual machines (users) available in the system. For each user the directory contains identifying information, id and password, and lists the resources (core, devices, etc) that this user can access, Although a user may be allowed access to physical devices it is more common to specify virtual devices, such as aspooledcard reader, card punch, and printer. A user can be allocated one or more virtual disk units,"mini disks"[sic.], which resemble a real disk of the same device type, except that they occupy a subset of the space on the real device.[2]: p.37
Family tree
edit| →derivation>>strong influence>some influence/precedence | ||
| CTSS | ||
| >IBM M44/44X | ||
| >>CP-40/CMS→CP[-67]/CMS | →VM/370→ VM/SE versions → VM/SP versions → VM/XA versions →VM/ESA→z/VM | |
| →VP/CSS | ||
| >TSS/360 | ||
| >TSOforMVT→ forOS/VS2→ forMVS→... → forz/OS | ||
| >>MULTICSand most othertime-sharingplatforms | ||
See also
editReferences
edit- ^Randal, Allison (February 2020)."The Ideal Versus the Real: Revisiting the History of Virtual Machines and Containers".ACM Computing Surveys.53(1).arXiv:1904.12226.doi:10.1145/3365199.S2CID139100890.RetrievedMarch 9,2023.
- ^abIBM Corporation (October 1970).Control Program-67/Cambridge Monitor System (CP-67/CMS) Version 3 Program Number 360D-05.2.005 User's Guide(PDF).p. 1.RetrievedMarch 9,2023.
- ^IBM Corporation (May 1973).Control Program-67/Cambridge Monitor System (CP-67/CMS) Version 3.2 Program Number 360D-05.2.005 CP/67 Program Logic Manual(PDF).RetrievedMarch 9,2023.
- ^IBM Corporation (September 1968).IBM System/360 Model 65 Functional Characteristics(PDF).p. 5.RetrievedMarch 9,2023.