Main > Monitor/Video Forum
Are flat CRTs crap? I bought a flat WG 9800 and I kinda hate it! :)
Zebidee:
--- Quote from: brandon on September 21, 2021, 04:24:34 am ---the photo uploaded weird.. it's not a wide screen. lol i can live with the geometry now that I have more controls with the service menu. i just have to figure out why adjusting it correctly at one resolution completely ruins it on the others.
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Haha looks better now you've tweaked it or whatever :D
Why would geometry be different when changing resolutions? The things normally shouldn't be related.
lilshawn may be onto something here.
--- Quote from: lilshawn on September 20, 2021, 03:27:19 pm ---oy vey
look at the datasheet for the TDA9112, the IC chip that is responsible for carrying the entire screen deflection. it has like 5 pages of waveforms showing what has to happen when you change something like the H-size or the pincushion. maybe something in there will let you know what you need to adjust to get your LCD looking fine.
as for the menu, To enter the factory menu turn the monitor off. Hold the buttons 'OSD' and 'Key +' and turn it on. be warned, you can seriously mess stuff up in here to the point you cannot see the menu to even change it back. then you are looking at an EEPROM swap.
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lilshawn:
don't quote me, but :laugh2: I believe all the controls are all on a GLOBAL adjustment. (IE changes the baseline adjustment of the monitor) so i don't know that you are going to be able to get a per resolution adjustment that you are looking for.
people are kinda using these monitors for an unintended purpose. generally tri and quad sync monitors do just fine... for their intended purpose... the idea being that you would put the monitor in a game...the screen would detect for that games resolution and you'd tweak the pic to look good never touch it again. it doesn't switch resolutions to work with this game and that game all the time. it's designed to work with a bunch of different games at a bunch of different resolutions but not at the same time. It's basically so you don't need to have 3 or 4 different monitors all with different specific resolutions and have to pick the right one to go into it.
yes you can load up a 32k game and have it run 32k, then load up a 15k and have it switch to that... but that's not really what it was designed to do.
i think to achieve what you are looking for, you'd have to program a custom microcontroller to interface the tda9112 through the i2c bus and have it set up to have custom screen profile for each resolution so that the 9112 can properly tweak the screen at each resolution.
brandon:
Yeah, I think you're right about that. I think the "super resolutions" from CRT Emudriver are further complicating things as well. If I tweak the image in 640x480 and then switch to 2650x240 it's way off. Honesty, I'm not super picky even though it may seem that way. I just want the image to not look swimmy while scrolling. I think I'm going to delete all the resolutions except for a few. Most everything I play is 240p+- and 15khz. I think 640x480 and a 240p super resolution will do 99% of what I play. I just want to get it close and tweak the width in MAME.