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Powerstrip writeup

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wpcmame:

--- Quote from: Silver on November 21, 2005, 08:45:34 am ---Although it auto-detects to an extent, its very unlike Advmame in that it is not geared to generating accurate resolutions as far as I can see (or if it is, its not very good).

--- End quote ---
I'm working on a better auto-detect algorithm for mame. The idea is to select the lowest resolution where the game fills as much as possible of the screen.

Problem is to ensure that it doesn't mess up usage on normal PC monitors.

--- Quote ---Also a quick quesiton hopefully someone can answer - can windows have more than setting per resolution ie if you needed/wanted 640x240 available at say 50Hz AND at 60Hz, can they coexist? or do you need to make a 641x240 or something with a different resolution?

--- End quote ---
Only one refreshrate per resolution.
(I think it is a limitation of how custom resolutions are handled in the graphics driver rather than windows).

If you use the same pclock for a slightly higher horizontal resolution or add some lines the result will be the same as if you used the correct resolution (unless mame adds stretch).

zyxman:
hello,

hope this is not completly offtopic: Yesterday i got my hantarex to work on a Matrox Millenium G200 and the Powerstrip. I use also an jpac which levels my video signal to the needed 1Volt. O.k now i have a good picture, its a little bit flickery but ok for an interlaced signal. When i am starting without the jpac, i got a vertical scrolling picture. I dont understand this. Normaly i have to got a darker Picture due to the lower Video Signal, but non scrolling... Am i wrong? Any suggestions ?

Thanks a lot

Zyx

elvis:
A vertical rolling signal means either you are sending a signal your monitor cannot sync to, or you need to manually adjust the vertical hold on your monitor (usually a small pot on the monitor's board, labelled clearly as "V Hold").

Silver:
I've got some time to look at the powerstrip stuff again....

I've also got a monitor hooked up that takes a large range of horizontal scan frequencies (testing how many now).

wpcmame - did you submit any of your changes for mame and resolution autodetection?

wpcmame:

--- Quote from: Silver on March 08, 2006, 12:14:17 pm ---wpcmame - did you submit any of your changes for mame and resolution autodetection?

--- End quote ---
No, I never got around submitting it. The problem is that it is such a complicated subject and I got a feeling that very few (if any) of the mamedevs understand what it is all about. The aspect ratio problem with the artwork has always been there and when I have pointed it out on the mame forum nobody have had a clue what I was talking about.

Just sending a patch to mame will not work. My plan is to try to get Aaron Giles' attention on the matter since he is the one who touched the artwork/display code last. Don't know when I will get the time to do it.

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