This page is a reference for people looking to get certain arcade boards working on the OSSC. These timings are mostly guesses and I’m sure there’s better resources out there. I’m only leaving this page live, as it might help people get their boards working on incompatible LCD panels…
Voltage Warning!!!
Please check your RGBs output voltages with an oscilloscope before using the OSSC!!! Improper voltages can kill your OSSC and other SCART equipment! Your video RGB lines should be around 660mV and sync should be between 250mV and 900mV for SCART. Sync can be up to 5v for the VGA input, but there is no low-pass filter on the VGA port, making SCART the desirable input.
Here’s an example of sync from a supergun with a SCART cable that isn’t properly attenuated. If used on the SCART input of the OSSC without attenuation, it would be damaged or completely broken:
More safety info coming soon!
Arcade Board Timings:
Ultimate Mortal Kombat 3
Line2x set from generic to optimal 320×240
go to sampling options
Go to adv timing of 320×240
H. Samplerate 426
H synclen 31
H backporch 62
H active 332
V synclen 3
V back porch 18
V active 255
Line3x set from generic to optimal 320×240
go to sampling options
Go to adv timing of 320×240
H. Samplerate 400
H synclen 35
H backporch 49
H active 320
V synclen 5
V back porch 14
V active 260
Arcade Board #1
Video LFP = 95MHz
Gain:
B/Pb Gain = 52
G/Y Gain = 59
R/Pr Gain = 53
Offset:
B/Pb Offset = 159
G/Y Offset = 158
R/Pr Offset = 158
As an FYI, for console timing, please see FirebrandX‘s OSSC page: http://www.firebrandx.com/osscprofiles.html