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

Revision as of 21:44, 21 June 2023

Revision as of 17:47, 20 September 2023

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''[[BYTE]]'' in 1984 called the XT/370 "a qualified success". The magazine praised IBM for "fitting all of the 370's features into the XT", and hoped for technical improvements that "might result in an even better computer".<ref name="sabine1984fall">{{cite news | url=https://archive.org/stream/byte-magazine-1984-09/1984_09_BYTE_09-09_Guide_to_the_IBM_PCs#page/n217/mode/2up/search/5160 | title=The IBM XT/370 Personal Computer | work=BYTE | date=Fall 1984 | accessdate=18 March 2016 | author=Sabine, Ernest | pages=210–217}}</ref>

The XT/370 was discontinued in April 1987.<ref name=givesup>{{cite journal | date=April 13, 1987 | url=https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 | title=IBM Gives Up on the Personal XT/, AT/370 | work=Computer Business Review | publisher=New Statesman Media Group | archiveurl=http://archive.today/2023.09.20-021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 | archivedate=September 20, 2023}}</ref>

===Personal Computer AT/370===

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The AT/370 also ran VM/PC, but with PC DOS 3.0 instead of 2.10 that the XT version used.<ref>Virtual Machine/Personal Computer User's Guide, p. 1-3, IBM publication number 6137739, December 1984</ref> VM/PC version 2, launched in November 1985, improved performance by up to 50%; it allowed add-on memory (in addition to the disk) to be used as a [[page cache]] for VM.<ref name="Gallant">{{cite journal|author=John Gallant|title=IBM exploiting AT/370 ability|journal=Computerworld: The Newsweekly of Information Systems Management|url=https://books.google.com/books?id=ZUMIDEwANHgC&pg=PA25|date=25 November 1985|publisher=Computerworld|pages=25, 29|issn=0010-4841}}</ref>

A November 1985 ''[[Computerworld]]'' article noted that the machine was "slow selling".<ref name="Gallant"/> The AT/370 was discontinued alongside the XT/370 in April 1987.<ref name=givesup />

===IBM 7437 VM/SP Technical Workstation===

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*'''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.

==Timeline==

{{Timeline of the IBM Personal Computer}}

==See also==