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Re: Z80 MC6845 video board examples [message #8438 is a reply to message #8432]

Fri, 02 April 2021 12:57

nealcrook
Messages: 127
Registered: October 2015
Location: UK

Senior Member

The Gemini Intelligent Video Controller for the 80-bus was a (commercial) design that used a Z80 and 6845 as a video controller that received commands from a host machine (usually another Z80). The IVC was decoded in the host machines i/o address space and had an "API" that allowed display and also allowed programs to be uploaded to the IVC processor for execution.

Overview and links to hardware and software manual:
https://nascom.wordpress.com/gemini/hardware/g812-ivc/
Schematics:
https://80bus.co.uk.mirror.jloh.de/pages/gemini/gm812.htm

Neal.

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[Message index]

		Z80 MC6845 video board examples By: lynchaj on Wed, 31 March 2021 04:36
		Re: Z80 MC6845 video board examples By: b1ackmai1er on Wed, 31 March 2021 23:25
		Re: Z80 MC6845 video board examples By: nealcrook on Fri, 02 April 2021 12:57
		Re: Z80 MC6845 video board examples By: lynchaj on Sun, 04 April 2021 06:53
		Re: Z80 MC6845 video board examples By: little_john on Sun, 04 April 2021 12:31
		Re: Z80 MC6845 video board examples By: lynchaj on Tue, 12 April 2022 07:30
		Re: Z80 MC6845 video board examples By: norwestrzh on Tue, 12 April 2022 09:50
		Re: Z80 MC6845 video board examples By: lynchaj on Tue, 12 April 2022 10:29
		Re: Z80 MC6845 video board examples By: lynchaj on Tue, 12 April 2022 10:54
		Re: Z80 MC6845 video board examples By: norwestrzh on Tue, 12 April 2022 14:44
		Re: Z80 MC6845 video board examples By: lynchaj on Tue, 12 April 2022 14:55
		Re: Z80 MC6845 video board examples By: plasmo on Tue, 12 April 2022 19:16
		Re: Z80 MC6845 video board examples By: norwestrzh on Wed, 13 April 2022 09:30
		Re: Z80 MC6845 video board examples By: plasmo on Thu, 14 April 2022 07:22
		Re: Z80 MC6845 video board examples By: gkaufman on Thu, 28 April 2022 07:51
		Re: Z80 MC6845 video board examples By: lynchaj on Sat, 30 April 2022 05:20
		Re: Z80 MC6845 video board examples By: etchedpixels on Tue, 17 May 2022 06:09

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