Software Support > GroovyMAME
SCART CRT TV And GroovyMAME Thread 2
Calamity:
--- Quote from: lettuce on January 30, 2012, 05:39:10 pm ---I have here 16.662kHz.
--- End quote ---
WOW. It accepts nearly the same hfreq that my Hantarex MTC 9110, but with a lower retrace time (better).
--- Quote ---Any other info u need to know?
--- End quote ---
Just center a 15.7 KHz mode: any one with 240 lines @60 Hz could serve. Use the one with the highest resolution available so your results will be more accurate. Then post your horizontal values (HFP, HSP, HBP). That will be enough.
lettuce:
Ok one quick question, should i be saving these setting i made on the 256x256 resolution?? As i have selected 240x256 and even if i move and Horizontal value down one the screen doesnt sync ?
lettuce:
Ok what i did was Lock Vfreq again (should i of done that). The settings horizontal are:
HFP 1ch 1.583
HSP 4ch 6.334
HBP 4ch 6.334
I very rarely change the H or V sync pluse settings when trying to get the picture to feel the display, im not sure what it does!?. I know HBP increase the screen on the left and HFP increase the screen on the right, just not sure what HSP or VSP does??
Calamity:
--- Quote from: lettuce on January 30, 2012, 06:09:43 pm ---Ok what i did was Lock Vfreq again (should i of done that). The settings horizontal are:
HFP 1ch 1.583
HSP 4ch 6.334
HBP 4ch 6.334
--- End quote ---
Those values aren't good ones. By 240 I meant lines. 240x256 is too low for getting accurate values.
Go for the highest horizontal resolution at 15.7 kHz. Do you have any 720x480@60i or something similar?
Think the horizontal sync pulse should be around 4.7 microseconds.
--- Quote ---I very rarely change the H or V sync pluse settings when trying to get the picture to feel the display, im not sure what it does!?. I know HBP increase the screen on the left and HFP increase the screen on the right, just not sure what HSP or VSP does??
--- End quote ---
Yes the porches have to do with the borders. The sync pulses control the time the beam uses to return to its place, vertically and horizontally. We shouldn't increase this value artificially as it would make the left / top border grow, but if we set it too low the TV won't be able to sync.
Calamity:
--- Quote from: lettuce on January 30, 2012, 06:02:38 pm ---Ok one quick question, should i be saving these setting i made on the 256x256 resolution?? As i have selected 240x256 and even if i move and Horizontal value down one the screen doesnt sync ?
--- End quote ---
You don't need to save anything, we're just testing. After we get the right values we'll recalculate everything with those.
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