F1GP Bug?

[Abou27]

I am having a bad couple of weeks Amiga wise!  Since adding a 50mhz FPU to my A1200 030 F1GP goes a bit mental when start a race.  Everything else works fine practice, qualifying etc. (amazing at higher frame rates).  However, in a race, the start procedure seems fine until the lights turn green.  At this point the user controlled car keeps accelerating and performing donuts and doesn't respond to any input.  I was just going to re-install but thought I'd see whether anyone else had encountered this strange problem and whether people think it may be FPU related?

Cheers.

[mikeymike]

Well that's odd, because F1GP is no different in terms of performance between my A500 or my A1200 / 040FPU / 64MB...

[Abou27]

Do you mean problem wise or frame rate?  Surely you can't get say 25fps on a standard A500?

[mikeymike]

fps.  Identical to A500 fps on my A1200.

[Abou27]

Odd.  When my A500 died and I got my bare A1200, there was a notable difference and then on to 030 an even greater improvement.  We have had very different experiences :-?

[futaura]

fps. Identical to A500 fps on my A1200.

Presumably you haven't tried changing the frame rate with F1GP-Ed?  F1GP is hardcoded at 8fps (will struggle on an A500 when lots of action on screen, with slowdown apparent - a basic A1200 will have no such trouble).  Anyway, with F1GP-Ed you can change the frame rate to match the capability of the cpu.  An accelerated A1200 can run F1GP at much smoother frame rates than an A500 can.  Fact :-)

[futaura]

I am having a bad couple of weeks Amiga wise! Since adding a 50mhz FPU to my A1200 030 F1GP goes a bit mental when start a race. Everything else works fine practice, qualifying etc. (amazing at higher frame rates). However, in a race, the start procedure seems fine until the lights turn green. At this point the user controlled car keeps accelerating and performing donuts and doesn't respond to any input. I was just going to re-install but thought I'd see whether anyone else had encountered this strange problem and whether people think it may be FPU related?

I don't think so, no.  I never really got to the bottom of this problem - I presume you're using F1GP-Ed to boost the frame rate?  What did you set it to?  Sounds like you set it too high - it's ok in qualifying/practice, but in a race it seems that F1GP cannot cope (probably some variables overflow due to the unexpected game update frequency - not unsurprising considering the frame rate changer is a hack after all, albeit a very nice hack :-)  IIRC, 20fps (NTSC) is the maximum safest limit.

[Amiga1200PPC]

Yes, correct. He has set the framerate too high I would say.

[Abou27]

@futaura

Yep, I'm using F1-Gp-Ed and have above 20fps at the moment.  It never crossed my mind that it could be that!  Cheers, I'll start working my way down till a point that works.