On Tuesday 22 September 2015 10:27:51 Rick Lair wrote: > Looking at the one print I found for my machine, it looks like Hsync > 15.87 Khz, and Vsync 54.39 Khz,
I suspect you meant 54.38 Hz. That would be within the reach of an NTSC monitor. Unfortunately those are limited to those tv's with inputs for old DVD's and VCR's, neither of which is near sharp enough to do what you want. That would imply a dot frequency in the 15 megahertz region, and a GBS8200 video adapter, about 35-40 bucks that the game console folks use so they can replace the failing CRT's in the coin-op game consoles with modern but vga only LCD monitors. The inputs on that are such that the worst adaptation you might have to do is invert the sync. Almost any TTL inverter can handle that. I don't know how that board might react to the 5 Hertz diff in vsync frequency though as the only place I have used one is on my Color Computer 3, whose sync was not 100% NTSC compatible. Non-interlaced IOW. > > Rick > > On 9/22/2015 10:23 AM, Leonardo Marsaglia wrote: > > 2015-09-22 11:19 GMT-03:00 Rick Lair <r...@superiorroll.com>: > >> Would something along these lines work? > >> > >> > >> http://www.ebay.com/itm/Brand-NEW-MDA-RGB-CGA-EGA-to-VGA-industrial > >>-Converter-/250851103017?hash=item3a67e41129 > > > > I guess that board woul work ok since it looks a lot better than > > mine. If you have the CGA frequencies you should have no problems. > > > > Mine was the same as this: > > > > http://www.ebay.com/itm/NEW-Arcade-game-RGB-CGA-EGA-YUV-to-VGA-HD-vi > >deo-converter-board-HD9800-GBS8200-/170860805754?hash=item27c818fe7a Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
