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Among its better-known uses is the [[BBC Micro]], [[Amstrad CPC]], and [[Videx]] VideoTerm display cards for the [[Apple II series|Apple II]].<ref name=":0" /> It is also part of many early graphics adapter cards for the [[IBM Personal Computer|IBM PC]], including the [[IBM Monochrome Display Adapter|MDA]], [[Hercules Graphics Card]] (HGC), [[Color Graphics Adapter]] (CGA) and the [[Plantronics Colorplus]].<ref name="PC Mag Jul 1983">{{Google books|id=V2588uIxmAQC|page=435|title=PC Mag Jul 1983}}</ref> Its functionality was duplicated and extended by custom circuits in the [[Enhanced Graphics Adapter|EGA]] and [[Video Graphics Array|VGA]] PC video adapters.
Originally designed by [[Hitachi, Ltd.|Hitachi]] as the '''HD46505''',<ref name="Anon. g127">{{cite web |title= |url=http://mess.redump.net/_media/datasheets/hitachi/hd46505.pdf |access-date=2024-02-22}}</ref> Hitachi-built versions are in a wide variety of Japanese computers, from Sony, Sharp, Panasonic, and Casio. It is also known as the '''6845 CRTC''' or the '''CRTC6845''', meaning "[[cathode-ray tube]] controller". This version was used on the [[Apricot PC]] and [[Victor 9000]] to provide a 800x400 resolution monochrome display.
A common clone of this CRT controller is the [[United Microelectronics Corporation]] (UMC) '''UM6845E''' CRT controller.
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