Software Support > GroovyMAME
GM image pixelated
Kaz:
--- Quote from: Zebidee on December 01, 2023, 01:17:18 pm ---"service mode" ... Is your monitor really a TV?
I noticed that you didn't have an amp and mentioned it earlier, but this won't affect pixelation - only brightness. Your brightness looks OK.
I don't think it is fair to compare arcade versions of games with PS1 versions. Even though they might have the same name, not the same.
I've spent time comparing GM games to original arcade PCB versions, and once you are setup properly, generally there is not much difference worth noting.
--- End quote ---
Thanks you for your input and tips very aprreciated as you seem to have quite a bit of knowledge.
When i was referring to service mode it was service mode/test mode from Capcom pcb ingame GM board, there's an option where you can turn video mode into interleaced.
No TV consumer set i have a brand new old stock arcade monitor intervideo VP wich it may also be the cause about being sometimes a little to crisp and pixelated in some games given that the focus and tube have been used for less than 40 hours compared to old arcade monitor tubes with burn and far from their best image quality and displaying the image a little more fuzzy and softer.
About my rig i use a 4350hd legacy with windows 10 and CRT emudrivers 2.0 by calamity windows7/8/10 compatibility so it works and im using Groovymame 255.002t version, nothing special and just followed the steps stated by calamity and it worked like a champ,switch res,messages from state of the game etc its all working fine... Dunno if im missing some performance video libraries from direxct3D by using such an old car but maybe is worth a shoot try a newer one as you said.
Anywais as you stated its not the perfect comparaison.
Im waiting for an incoming MVS board to check side by side against GM and see differences anywais.
Also im in doubt about connection harness doesnt have an impact in image quality since im using a bypass RGB scart at 0.7 V RGB and not conecting direct to Jamma harness on my chasis because the levels of RGB are much higher than 0.7v through a jamma conection.
Any more tips are aprreciated and thank you for your help! :)
Recapnation:
For what it's worth, arcade Tekken 3 was 512 * 480 interlaced, Namco's System 12 was not really designed for 480-P as those monitors were still uncommon for non-dedicated cabs. The PS version runs at 320 * 240 in order to keep ~60 FPS.
So yeah, it's a bad comparison in this regard, but as Buttersoft said, you must have forced 240-P for the GM instance as there's no 240-P option on the original System 12 PCB settings and your pic looks 240-P? If you force via emulation 240-P into a hi-res game you can't expect the same result as a true (even if reprogrammed) 240-P game.
Also keep in mind not every home system outputs the same signal quality in RGB. If I recall there're distinctions even between the different PS models.
Zebidee:
Age of the card isn't really an issue - when I was comparing GM to my small stock of arcade PCBs, I was using an XP64 machine with an even older ATI X1050 card with a massive 64MB of RAM, with the (now obsolete) CRT_emudriver 1.2b and running an older-but-modded version of GM ~0.200.
It's more if there was some kind of conflict between the OS, version of GM you are using and what drivers are supported.
If you are going to go ahead and compare GM emulation to Ps1 regardless, you'll need to know exactly what both are doing, where they are similar and where (and why) they are different.
--- Quote from: Kaz on December 01, 2023, 02:28:57 pm ---Anywais as you stated its not the perfect comparaison.
Im waiting for an incoming MVS board to check side by side against GM and see differences anywais.
Also im in doubt about connection harness doesnt have an impact in image quality since im using a bypass RGB scart at 0.7 V RGB and not conecting direct to Jamma harness on my chasis because the levels of RGB are much higher than 0.7v through a jamma conection.
Any more tips are aprreciated and thank you for your help! :)
--- End quote ---
FWIW, the JAMMA harness itself does not add any voltage to the RGB. It is just a "harness", serves to make connections. It makes no real difference whether you input the RGB via the JAMMA or via a "bypass SCART RGB" (whatever that is exactly) directly to the monitor. Assuming no connection issues, you are still getting RGB at 0.7vpp, though is possible the PS1 might be outputting RGB at a slightly higher level than the PC/VGA.
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