IBM PC Server System/390: Difference between revisions

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===S/390 Processor Card===
===S/390 Processor Card===
An important goal in the design of the S/390 Processor Card was complete compatibility with existing mainframe operating systems and software. The processor implements all of the ESA/390 and XA instructions which prevents the need for instruction translation. There are three generations of the card:
An important goal in the design of the S/390 Processor Card was complete compatibility with existing mainframe operating systems and software. The processor implements all the ESA/390 and XA instructions which prevents the need for instruction translation. There are three generations of the card:


* The original S/390 Processor Card incorporated 32MB of dedicated memory, with optional 32MB or 96MB daughter cards, for a combined total of 64MB or 128MB of RAM. The processor was officially rated at 4.5 MIPS. It was built to plug into a Micro Channel architecture host system.
* The original S/390 Processor Card incorporated 32 MB of dedicated memory, with optional 32 MB or 96 MB daughter cards, for a combined total of 64 MB or 128 MB of RAM. The processor was officially rated at 4.5 MIPS. It was built to plug into a Micro Channel architecture host system.
* The second version was built for a PCI host system. It included 128 MB of dedicated memory as standard, and was still rated at 4.5 MIPS.
* The second version was built for a PCI host system. It included 128 MB of dedicated memory as standard, and was still rated at 4.5 MIPS.
* The third version, referred to as a P/390E card (for Enhanced), included 256 MB of dedicated memory and was rated at 7 MIPS. It, too, was built for a PCI host system. There was an extremely rare (possibly only ever released as pre-production samples) 1 GB memory version of the P/390E card.
* The third version, referred to as a P/390E card (for Enhanced), included 256 MB of dedicated memory and was rated at 7 MIPS. It, too, was built for a PCI host system. There was an extremely rare (possibly only ever released as pre-production samples) 1 GB memory version of the P/390E card.


===OS/2 Software===
===OS/2 Software===
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* [http://ps-2.kev009.com/p390/p390.htm P/390 Information]
* [http://ps-2.kev009.com/p390/p390.htm P/390 Information]
* [https://en.wikipedia.org/wiki/PC-based_IBM-compatible_mainframes PC-based IBM-compatible mainframes (Wikipedia)]
* [https://en.wikipedia.org/wiki/PC-based_IBM-compatible_mainframes PC-based IBM-compatible mainframes (Wikipedia)]
* [ftp://p390.ibm.com/doc/p390/ IBM P390 FTP]


[[Category:Mainframe]]
[[Category:Mainframe]]

Latest revision as of 21:55, 13 August 2023

The P/390 is basically an IBM mainframe system adapted to run on a personal computer. A P/390 comes on a single card that contains a System/390 instruction set, allowing operating systems such as OS/390, MVS, VM, and VSE, to be installed. The P/390 makes it possible to develop, test, and run application programs written for the mainframe on a smaller, more economical machine. After testing, programs that require mainframe capability can be moved to the mainframe. A common use of the P/390 today is for 2000 analysis and testing. The P/390 is sold as part of a PC workstation that also comes with an OS/2 operating system. The entire product is called the IBM PC Server System/390. The MVS and OS/390 operating systems require 128 megabyes of RAM. VM and VSE will install with 32 megabytes.

An R/390 is the P/390-PCI card installed on IBM's RS/6000 server. Both products are sold both as development environments and as economical approaches for companies with older mainframe systems to move their legacy applications to a new production environment.

S/390 Processor Card

An important goal in the design of the S/390 Processor Card was complete compatibility with existing mainframe operating systems and software. The processor implements all the ESA/390 and XA instructions which prevents the need for instruction translation. There are three generations of the card:

  • The original S/390 Processor Card incorporated 32 MB of dedicated memory, with optional 32 MB or 96 MB daughter cards, for a combined total of 64 MB or 128 MB of RAM. The processor was officially rated at 4.5 MIPS. It was built to plug into a Micro Channel architecture host system.
  • The second version was built for a PCI host system. It included 128 MB of dedicated memory as standard, and was still rated at 4.5 MIPS.
  • The third version, referred to as a P/390E card (for Enhanced), included 256 MB of dedicated memory and was rated at 7 MIPS. It, too, was built for a PCI host system. There was an extremely rare (possibly only ever released as pre-production samples) 1 GB memory version of the P/390E card.

OS/2 Software

To use this card on OS/2 you require the following software:

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