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Powerstrip writeup
VooD:
--- Quote from: wpcmame on November 06, 2005, 01:39:40 pm ---
--- Quote from: VooD on November 05, 2005, 01:28:55 pm ---I gave it a try using my 9600 XT, and well...it kinda worked,
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VooD:
--- Quote from: Barkuti on November 06, 2005, 04:37:26 pm ---VooD, you can do whatever you need with PowerStrip. You seem to lack the knowledge of how analog signals work. From a monitors standpoint, all "resolutions" working at or around the same horizontal scanning frecuency are the same (digital units may distinguish between differently polarized sync signals modes, but that's another story).
For a CGA (~15.7 KHz) mode, if you are not getting correct refresh rates is because you're not using the correct amount of lines. For a 60 Hz refresh rate, that translates into 262 lines, and 15720 Hz Hsync frecuency. I mean, ALL 60 Hz modes at that Hsync frecuency HAVE 262 lines. This is axiomatic: Hsync freq. = lines * refresh.
When you refer to 224 or 240 lines, you're referring to the active lines. Total mode lines = active lines + blanking lines. So you're missing the blanking lines, 38 for 224 line modes and 22 for 240 ones.
I heartily recommend you this tutorial:
Modeline howto / tutorial / help -- Cathode Ray Tubes (CRTs)
Cheers
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I
Barkuti:
VooD, you are using a fixed resolution monitor. Different modes' scanning frecuencies can (and will) be different due to a number of reasons. But you don't need to scan at 15735.9348592873945872 EXACT frecuency, that's silly and any device with such a requirement would be useless.
Any CGA monitor or SCART driven TV will accept at least 15.5 - 16 KHz Hfreq, and some sets may do 16.5 KHz or more.
Refresh rate is the most important fact. Resolution isn't. A 224 line game can look perfect using a 240 line mode. Remember, as long as you don't stretch the picture or apply any filtering to it you are fine.
Sure, you may be thinking you'll see black borders displaying 224 line games in 240 line modes. Of course you will, if you have adjusted your screen to see all those 240 active lines. But expand your picture to hide roughly 16 lines, half up and half down, and the result will be EXACTLY the same. Use a game with a screen geometry pattern on the operator's menu for adjustment.
After all, a blanking line doesn't belongs to the picture and therefore in a correctly setup monitor it will be rasterized close or out of the screen, if at all. Remember MAME will center that 224 lines image over 240, leaving exactly 8 black lines in the upper part & 8 down.
On the other hand, if you define a true 224 active lines mode with 38 blanking lines, and your monitor had been previously adjusted to display 240 active lines, you will see black borders after switching to your "true" 224 line mode, 8 line wide black borders up & down. So you will need to adjust anyway. ::)
Cheers
VooD:
I can assure you I can setup pixel perfect different vertical resolutions in advmame with no borders at all (neither overscanned lines) or resizing.
In fact you can easily test every desired mode with advcfg after doing the first monitor calibration, and they will appear mostly centered.
Maybe tomorrow If I get bored enough I
Silver:
--- Quote from: VooD on November 19, 2005, 01:11:01 pm ---
I can
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