PC-based IBM mainframe-compatible systems: Difference between revisions

Revision as of 05:53, 20 January 2006

Revision as of 18:30, 20 January 2006

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The '''S/390 Integrated Server''' (short for System/390 Integrated Server) was a low-end [[IBM]] [[mainframe]] offering in the mid-1990s. Unlike other [[ESA/390]] mainframes, the S/390 Integrated Server was actually an S/390 processor card installed in an IBM PC Server or [[RS/6000]]. Another unusual feautrefeature in the mainframe world was its use of internal [[Direct access storage device|DASD]], although external storage was also available.. It came in two varieties, the [[POWER]]-based R/390 and the [[Pentium]]-based P/390.

==S/390 Processor Card==

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==P/390==

P/390 was the designation used for the expansion card used in an IBM PC Server and was less expensive than the R/390. The original P/390 server was housed in an IBM PC Server 500 and featured a 90 MHz [[Intel]] [[Pentium]] processor for running OS/2. The model was revised in mid-1996 and rebranded as the PC Server 520, which featured a 133 MHz Intel Pentium processor. Both models came standard with 32MB of [[RAM]] and were expandable to 256MB. The PC Server 500 featured eight [[Micro Channel architecture|Micro Channel]] expansion slots while the PC Server 520 added two [[Peripheral Component Interconnect|PCI]] expansion slots and removed two Micro Channel slots.

==Uses==

The S/390 Integrated Server was not a particularly powerful mainframe, even when it was released. It was commonly used for development and as a cheaper replacement of older mainframes. It was capable of running [[OS/390]] as well as older 24-bit operating systems, but due to its inherent 31-bit design, can notcannot run current versions of [[z/OS]].

==External links==

* [http://www.redbooks.ibm.com/abstracts/sg244847.html P/390 and R/390 with OS/390: An Introduction (IBM Redbook)]

[[Category: Mainframe computers]]