Tony Duell wrote:
>> What really sucked was the 32 column screen. I never bought one of
>> the many 80 column cards, they were all serial based. Only useful
>> under OS-9.
> Eh? The 80 column modules I read about (I never had one) contained a
> 6845 CTRC, RAM, and a bit of logic. Nothing to do with a serial port.
Just BTW, in case anyone is interested in the "inner workings" of the 6845,
DP8350, 8275, 6545 or 5027 CRTCs, I've got a copy of Gerry Kane's "CRT
Controller Handbook" here. Anyone got a copy of the book mentioned on the
front cover, "An Introduction to Microcomputers: Volume 3 - Some Real
Support Devices"?
Also, has anyone got a timing diagram of the sync signal a Microvitec Cub
653 (as used with the BBC Micro) requires or a BBC Micro generates? I'm
specifically interested in the pulse width of the Hsync and Vsync parts of
the Csync signal and the high pulse width (visible area).
Thanks.
--
Phil.
philpem_at_dsl.pipex.com
http://www.philpem.dsl.pipex.com/
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Received on Sun Sep 08 2002 - 16:40:00 BST