*WANTED* Pattern Generator

[Arcade Collector]

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!

 

[Homer J Simpson]

I'm looking to purchase a pattern generator for Arcade monitors. These
monitors ran at 15Khz.

NTSC?

 

[Arcade Collector]

It's a 20EZ Sanyo made for the United States so yes, I believe it would be
NTSC.

Slope!

 

[Ken Layton]

Wells-Gardner makes the "Genie" monitor pattern generator for arcade
monitors.

 

[James Sweet]

It's a 20EZ Sanyo made for the United States so yes, I believe it would be
NTSC.

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.

 

[boardjunkie]

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.

 

[Jukka Aho]

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!

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:

<http://www.tkk.fi/Misc/Electronics/circuits/vga2tv/linux_tv.html>
<http://www.mythtv.org/wiki/index.php/Modeline_Database>
<http://www.sput.nl/hardware/tv-x.html>
<http://www.brienposey.com/kb/thome_theatre_pc_2.asp>
<http://www.nada.kth.se/~feldt/vgascart/tv.html#720x480>

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.

 

[Homer J Simpson]

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.

Or maybe a Radio Shack Color Computer which go for less than $10 and allow
unlimited graphics.