Main > Monitor/Video Forum
Soft-15KHz - slim new tool for 15KHz on normal vga cards
bent98:
Salior have you finalized a custom15khz.txt file?
Ummon:
--- Quote from: SailorSat on March 03, 2008, 08:06:11 pm ---As far as I know there are really restrictions in the ForceWare, however those only regard interlace features.
An older GeForce2 MX for example...
With driver 12.41 it did actually support interlace (via powerstrip).
With driver 66.92 it did NOT support interlace (neither powerstrip nor soft15khz).
Hm...
There are some flags in the NVidia driver to doublescan low resolution, but that cause it with but 288 line and 240 line resolutions. If it really runs at 31kHz / 100Hz the pixelclock would be exactly the double as it would need...
As long as I can't reproduce here, it's like shooting in the fog.
--- End quote ---
That's what I meant. The forceware drivers. But with older Nvidia cards, I use driver versions after 66.92, and have no problem with low pclocks. I notice my 6200 will do 640x224 at 15khz, but anything lower it won't with the nvidia drivers. With the advancemame svgalib drivers, it'll do anything I throw at it. I tried to adjust the low-level settings of the bios with Rivatuner, with no success. I tried, or at least thought of adjusting the forceware, but there's no tutorial for Rivatuner, so I didn't really understand what to do. I've never liked powerstrip, but I haven't given it a test, either. Maybe I will.
alui:
--- Quote from: alui on March 03, 2008, 06:48:30 pm ---I have the NVidia 6600GT AGP card and can't seem to run some of the 15khz resolutions. For example, when I tried to run Pac-Man at 352x288 or 384x288, my WG9200 still runs it at 30.1kHZ but at 100Hz refresh rate. But resolutions such as 448x240 and 640x240 runs fine at 15.7kHz at 59Hz refresh. Seems like my video card doesn't like any of the resolutions that have 50Hz refresh rates. Is there any way for me to enable those resolutions so I can run them at 15kHz? BTW, I tried it using both Forceware 93.71 and 162.18 with the same results.
Thanks
--- End quote ---
As a follow up to my earlier post, I was able to get 352x288 to run @ 15kHz after trying a few modeline. I think the pixel clock determines whether or not the card would switch to 15kHz or stay at 31kHz w/ 2x refresh, though I'm not sure.
Here's the one that works:
Modeline "352x288@50" 9.55 352 392 520 608 288 289 293 316 +hsync +vsync
I was also able to come up with a 800x600 modeline that doesn't give me any flickers in windows. I couldn't use the default 800x600 that came with Soft-15kHz because it flickers too much. Here's the modeline for my no-flicker 800x600:
Modeline "800x600@60" 40 800 840 968 1056 600 601 605 628 +hsync +vsync
I hope this will come in handy to someone with the same monitor/video card combo as I do ...
milhouse:
Has anyone had trouble with NBA Jam using this? It worked fine with my ArcadeVGA but I am getting an out of range error on my monitor using Soft-15khz and a different video card.
Thanks.
Silver:
--- Quote from: milhouse on March 07, 2008, 10:28:00 am ---Has anyone had trouble with NBA Jam using this? It worked fine with my ArcadeVGA but I am getting an out of range error on my monitor using Soft-15khz and a different video card.
--- End quote ---
Run 'mame -verbose' from the command line to see what resolution mame is picking when it runs NBAjam. Then you can force the game to use a different resolution or remove the resoluton from soft15Khz as your monitor does not support it.