Race Sim Central
Rec.Autos.Simulators Archive

GPL: USB modem and CPU slowdown

2 posts by 2 people · 19 Jun 2000 18:31 UTC - 19 Jun 2000 20:27 UTC

Rob Adams 19 Jun 2000 18:31 UTC#261798
Thanks for all the advice on a USB modem for GPL online racing. I bought a Creative Modem Blaster USB on Friday and in general the results were good. Much more stable on-line racing - less warping, no disconnects (so far), and other cars don't jump around nearly as much. (I did get a 6 second lap at Monza due to one warp, but that server was very flaky). However, the warnings about frame rate hits were very true. I had to drop back to 800x600 and turn a bunch of stuff off to get a driveable fps. With my old winmodem I could run at 1024x768 and get 36fps consistently. Anybody have any tips on hardware tweaks to get the fps back up (especially at Spa)? Specs: PII 333, 128MB RAM, Voodoo 3 3000 (oc'ed to 183), Diamond MX-300 sound card, LWFF USB wheel. I'm gonna keep the modem because even though GPL is pretty ugly at 800x600 with low detail bias, it's nice to be able to race close without fear of jumpy cars. And I got my first win in my second race with the new modem, so it's obviously lucky! Thanks! -- Rob
Brett C. Cammack 19 Jun 2000 20:27 UTC#261822
Had that happen to me with the same modem. I think it has to do with interrupt sharing and which interrupts are used. Interesting you have a V3. I was beginning to suspect it was only with the V2 such as I have, but I guess not. I'll be glad when I can toss a new mobo in my machine so I can move this DSL modem from the printer port to it's very own ethernet NIC. (sounds weird, I know, but the printer port *is* parallel and doesn't share and interrupt with anything so it actually has less impact on the CPU burden than the USB port did...) Regards, Brett C. Cammack That's Racing! Motorsports Pompano Beach, FL

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