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

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===S/390 Integrated Server===

[[File:IBM s390 integrated server (1).jpg|thumb|IBM S/390 Integrated Server]]

The S/390 Integrated Server (aka S/390 IS) is a mainframe housed in a comparablycomparatively small case (HxWxD are 82 x 52 x 111 cm). It became available from November 1998. It is intended for customers who do not require the I/O bandwidth and performance of the [[Multiprise 3000|S/390 Multiprise 3000]] (which has the same size). Only 256 MB of ECC Memory and a single CMOS main processor (performance about 8 MIPS) are used; the S/390 CPU used in the Integrated Server is in fact the P/390 E-card. A [[Pentium II]] is used as IOSP (I/O Service Processor). It supports four [[ESCON]] and to four parallel channels. Standard PCI and ISA slots are present. A maximum of 255 GB internal harddisks are supported (16x 18GB HDs, with 2x HDs for redundancy). The supported OSs are OS/390, MVS/ESA, VM/ESA and VSE/ESA.

===Fujitsu PC-based systems===

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* '''FLEX-ES''' by Fundamental Software emulates both System/390 (ESA/390) and [[z/Architecture]]. Claimed to be one of the most popular PC-based IBM-compatible mainframe products (as of 2006). While FLEX-ES is capable of running on most PC hardware, the licensing agreement requires that FLEX-ES must run on the machine with which it was sold; in the past, this included Compaq Proliant and HP servers, but today this is nearly always an approved IBM [[IBM System x|x]]Series server or a [[ThinkPad]] laptop.

* '''[[Hercules (emulator)|Hercules]]''', an open source emulator for the System/370, System/390, and z/Architecture instruction sets. It does however require a complete operating system in order to execute application programs. While IBM does not license its current operating systems to run on Hercules, earlier System/370 operating systems are in the [[public ___domain]]{{Citation needed|date=February 2021}} and can be legally run on Hercules.

* '''[[zPDT]]''' (System/z Personal Development Tool), an IBM offering allowing IBM PartnerWorld Independent Software Developers (ISVs) to legally run [[z/OS]] 1.6 (or higher), [[IBM DB2|DB2]] V8 (or higher), [[z/VM]], [[z/TPF]], or [[z/VSE]] 4.1 (or higher) on PC-based machines that can be acquired based on a Linux emulation.

*'''IBM ZD&T''' (Z Development and Test Environment), an IBM offering ''provides an x86-based environment that emulates Z hardware and runs'' genuine ''z/OS software, offering unmatched application portability and compatibility. IBM Z Development and Test Environment can be used for education, demonstration, and development and test of applications that include mainframe components.''

* The Z390 and zCOBOL is a portable macro assembler and COBOL compiler, linker, and emulator toolkit providing a way to develop, test, and deploy mainframe compatible assembler and COBOL programs using any computer that supports J2SE 1.6.0+ runtime.