Sega Genesis and Sega CD 240p Test pattern release

Artemio · Post by **Artemio** » Thu Mar 10, 2011 5:25 am

Hello guys,

I am developing this software for the Genesis, Sega CD and Dreamcast, all code is open source and available to the public. It is a homebrew software suite for video game consoles developed to help in the evaluation of upscalers, upscan converters and line doublers.

It has tests designed with the processing of 240p signals in mind, although when possible it includes other video modes and specific tests for them. These have been tested with video processors on real hardware and a variety of displays, including CRTs and Arcade monitors via RGB.

As a secondary target, the suite aims to provide tools for calibrating colors, black and white levels for specific console outputs and setups.

It includes, amongst other things: a PLUGE pattern, Color Bars, Gray Ramp, Grid and Drop Shadow test.

Here is the link with all the information:

http://junkerhq.net/xrgb/index.php/240p_test_suite

And the downloads:

http://code.google.com/p/240p-test-suite/downloads/list

If you are interested, all you need is either a Dreamcast and a CD-R, a flash cart for the Genesis or a CD-R for the Sega/Mega CD. I want to port it to other platforms which have a viable SDK, and all suggestions are welcome. I intend this tool to be community driven, so shoot with your features, graphics and code =)

I have been changing it constantly, since it has been in development for over a month so far.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Thu Mar 10, 2011 6:38 am

This is fun stuff, but color bars can have few more colors you know

There's total of 15 shades possible with shadow/highlight

Artemio · Post by **Artemio** » Thu Mar 10, 2011 6:45 am

I tried that as a matter of fact. The shadows are there, but highlight weren't pure colors... or I did them wrong. Without shadows I only had 8 colors though.

I used sprites with the palettes and priorities, on real HW and Gens, but all I got were secondary shades of Color. Maybe I didn't understood it correctly.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Thu Mar 10, 2011 7:10 am

The color sequences are following :

Normal : 0 2 4 6 8 A C E
Shadow : 0 1 2 3 4 5 6 7
Highlight : 7 8 9 A B C D E

RGB values for computers etc. are :
Normal : 0, 36, 72, 108, 144, 180, 216, 252
Shadow : 0, 18, 36, 54, 72, 90, 108, 126
Highlight : 126, 144, 162, 180, 198, 216, 234, 252

Emulators do not get highlight part right for now.

Hope this helps ^^

Artemio · Post by **Artemio** » Thu Mar 10, 2011 7:42 am

Thanks a lot for giving me new hopes to attempt it again. I did try it about a week ago, and as mentioned above although I expected the results you mentioned but didn't get them on real hardware. Must have done something wrong, will attempt it again. Thanks a lot.

Artemio · Post by **Artemio** » Tue Mar 15, 2011 6:46 am

Just released the Sega CD builds, will work out to try and squeeze the rest of the colors.