[Coco] : 15KHz monitor card for PCs

Mark McDougall msmcdoug at iinet.net.au
Mon Aug 7 21:51:43 EDT 2006

Hotmail wrote:

> Didn't the coco monitors run at 15KHz?  Would this card help (or make
> any sort of difference) with any emulators?
> http://ultimarc.com/avgainf.html

This card is primarily for people that want to setup a MAME cabinet in a
real arcade cabinet using the original arcade monitor.

Some of the arcade enthusiasts are a fussy bunch. Lots of games,
particularly the earlier ones, had all sorts of odd resolutions due to
the custom video hardware on the PCB, that don't map nicely to standard
VGA resolutions. As a result, playing the games on a PC/VGA monitor
meant that some games either couldn't be played full-screen, or had to
be stretched to do so. To many, this is totally unacceptable.

This card allows most of the games to be run in native resolution at
full-screen. As well as using 15kHz rates the card itself also supports
tweaked (non-standard) timing modes.

The Coco has relatively few output resolutions which all scale
*reasonably* nicely to VGA resolutions. So unless you're a Coco
enthusiast who is yearning to run MESS on a 15kHz monitor, it's not
really useful.


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