 | |
| Developer | IBMCambridge Scientific Center (CSC) |
|---|---|
| OS family | CP/CMS |
| Working state | Historic |
| Marketing target | IBM mainframe computers |
| 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 ahypervisor, or Virtual Machine Monitor, fromIBM for itsSystem/360 Model 67 computer.
CP-67 is the control program portion ofCP/CMS, avirtual machine operating system developed by IBM'sCambridge Scientific Center inCambridge, 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/370 in 1972, whenvirtual memory was added to theSystem/370 series.[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 CMScan be run on a properly configured System/360 as a single-user system without CP-67."[2]
The minimum configuation for CP-67 is:[3]: p.1
Disks to be used by CP have to be formatted by astandalone utility calledFORMAT, 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 aspooled card 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
| → 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 | ||
| >TSO forMVT → forOS/VS2 → forMVS → ... → forz/OS | ||
| >>MULTICS and most othertime-sharing platforms | ||
| Supercomputer | |
|---|---|
| Server,mainframe | |
| Desktop,workstation | |
| Point of sale | |
| Projects | |
| Related | |
