Multisync monitor: Difference between revisions

Revision as of 23:46, 16 August 2020

Revision as of 23:52, 16 August 2020

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Computers that did not use ordinary televisions still often relied on fixed scan rates. IBM's original 1981 [[IBM Personal Computer|PC]], for instance, was sold with a choice of two video cards ([[IBM Monochrome Display Adapter|MDA]] and [[Color Graphics Adapter|CGA]]) which were intended for use with custom, fixed scan-rate IBM monitors.

Released in 1984, IBM's [[Enhanced Graphics Adapter|EGA]] required the use of a dual-sync monitor which supported the scan rate of CGA as well as a second scan rate for EGA's new video modes.<ref name=":0">{{Cite book|last=|first=|url=http://minuszerodegrees.net/oa/OA%20-%20IBM%20Enhanced%20Color%20Display%20(5154).pdf|title=IBM Enhanced Color Display Manual|publisher=|year=|isbn=|___location=|pages=1}}</ref> This monitor as well as others that could be manually switched between these two sync rates were known as dual-scan displays.<ref>{{Cite book|last=Inc|first=InfoWorld Media Group|url=https://books.google.com/books?id=YToEAAAAMBAJ&lpg=PA39&dq=dual-sync%20EGA&pg=PA39#v=onepage&q&f=false|title=InfoWorld|date=1988-08-22|publisher=InfoWorld Media Group, Inc.|language=en}}</ref>

The first multisync monitor - the NEC Multisync - was released in 1985 to provide support for CGA, EGA, the various extended forms of those standards marketed by third party vendors, and standards yet to be released.<ref name=":1">{{Cite book|last=Inc|first=InfoWorld Media Group|url=https://books.google.com/books?id=mTwEAAAAMBAJ&lpg=PA61&dq=multisync&pg=PA61#v=onepage&q&f=false|title=InfoWorld|date=1986-10-27|publisher=InfoWorld Media Group, Inc.|language=en}}</ref>