I'm looking to purchase a pattern generator for Arcade monitors. These monitors ran at 15Khz.
If you have on or have a recommendation on a good one to buy please let me know!
Thanks,
Slope!
*WANTED* Pattern Generator
Nov 07, 2006
7 Replies
NTSC?
It's a 20EZ Sanyo made for the United States so yes, I believe it would be NTSC.
Slope!
Wells-Gardner makes the "Genie" monitor pattern generator for arcade monitors.
They're NTSC scan rates, but the monitors are analog RGB so you need something that produces that sort of output rather than the composite used for a lot of TV pattern generators.
In addition, that particular monitor wants to see negative going video signals, so you'd need to build an inverter board for it to display correctly. The 20EZ came with an inverter board (to convert standard video to neg video) but sometimes they're missing due to the fact that the games they were used in didn't need it. Good to have one just in case.
If you can't easily find one, how about just creating a 15 kHz video mode on Linux (with modelines) or on Windows (with tools such as PowerStrip)?
See these:
Once you have the mode correctly set up you can create test card images on your own, or generate them with programs such as FML Test Card Maker or Nokia Monitor Test.
Or, you could buy an old Amiga computer (Amiga 500, Amiga 600, Amiga
2000, Amiga 1200, whatever) and use that instead. Amigas natively output 15 kHz RGB, and you can choose between interlaced and non-interlaced modes. The later models also allow choosing between NTSC and PAL.
znark
Or maybe a Radio Shack Color Computer which go for less than $10 and allow unlimited graphics.
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