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.
How do you think you setup powerstrip for proper 60hz display?
And how to tell mame that a 262 line mode in windows only has 240 active lines?
The mode lines I use from a earlier post.. i.e.
80% of those display correctly on a commodore 1084 monitor (and a d9200)
and display the correct amount of lines. (Be it 50 or 60hz)
The front and back porch defines the retrace period.
Not the active number of lines. (If you notice the 50hz and 60hz modes have different front porch values)
I keep running into the problem when I try to use the lower pclocks
the card and computer locks up or generates a unusable display.
This is with nvidia and ati radeon chips.
To me the powerstip solution seems to be a dead end at the moment, along with
advmame under windows. (no support for the newer video cards)
I would love to put a good video card into my main mame system, my arcadevga 9200 based version really sucks at house of the dead 3.