>The disadvantage: CPU cycles going to the routines handling FF
>The advantage: Knowing through the wheel what those front wheels are doing
>w/o having to look at them.
yesterday, supposedly quoting a GPL developer:
As for CPU usage, I have seen a post by Randy Cassidy, one of the
designer of Grand Prix Legends who tested some FF wheel and here's his
quote:
"Of the wheels I've tried, the Force GT (USB) causes by far the
greatest CPU hit. On a PII-400, it takes about 3.5 million CPU cycles
(about 8.75 milliseconds) to issue a simple force command. This is
unconscionable!
By contrast, the Logitech Wingman Formula Force (serial) takes about
50,000 cycles (about 0.12 milliseconds), and the Microsoft Sidewinder
Force Feedback wheel (game port/MIDI) takes about 1.5 million cycles
(about 3.75 milliseconds - still very, very high, but servicable;
drops
to about 1/3rd this amount if the wheel and pedals are stationary, but
what good does that do you?)"
Joe