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GPL with Cyrix 6x86 crashes?

14 posts by 10 people · 08 Apr 1998 - 12 Apr 1998

I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the program. Has anyone been able to run it on a Cyrix processor? --
I found the answer in http://gpl.gamestats.com . It will not run on a Cyrix chip. So it seems like a good time to upgrade :-) >I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the >program. Has anyone been able to run it on a Cyrix processor? >--
> I found the answer in http://gpl.gamestats.com . It will not run on a Cyrix > chip. So it seems like a good time to upgrade :-) > >I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the > >program. Has anyone been able to run it on a Cyrix processor? What have Papyrus/Sierra got against the Cyrix processors - the Nascar 2 demo wouldn't work with a Cyrix processor either, even though the final version does ? It can't be that difficult to make the code work with both straight off, is it ? You don't end up with two executables with the final versions - so why don't the demos work ? John -- John Hartridge | FUJIFILM Electronic Imaging Ltd Senior Software Engineer | Three Cherry Trees Lane, Internal phone 3282 | Hert HP2 7RH
On 8 Apr 1998 13:18:33 GMT, "John Hartridge"
Quoted text (8 lines)>What have Papyrus/Sierra got against the Cyrix processors - >the Nascar 2 demo wouldn't work with a Cyrix processor >either, even though the final version does ? It can't >be that difficult to make the code work with both straight >off, is it ? You don't end up with two executables with >the final versions - so why don't the demos work ? >John
Cyrix has a lousy FPU....nuts, and I work for National Semiconductor, too..... Jeff
>What have Papyrus/Sierra got against the Cyrix processors - >the Nascar 2 demo wouldn't work with a Cyrix processor >either, even though the final version does ? It can't >be that difficult to make the code work with both straight >off, is it ? You don't end up with two executables with >the final versions - so why don't the demos work ? I'm just wildly guessing, but I think they have a routine that checks for the processor type during game start-up and then branches. One part of the code is optimized for Cyrix, another for Intel. If you are doing a pre-lease demo, it's easier to have just one branch - and since you have to choose, it makes more sense to provide for the chip with the wider marketshare. Like it or not, Intel is "default", AMD and Cyrix come second in installed user base. -- Wolfgang Preiss \ E-mail copies of replies to this posting are welcome. Uni des Saarlands \ and U.S. law. You have been warned.
AKH 08 Apr 1998#403365
Just a guess on my part, but since I saw one report of GPL working on a CYRIX (a MX version) I imagine that it is only the older run of processors that have the problem. That doesn't mean if you just bought a 166+ it would work, but rather the newer design that includes the MMX instructions (a Cyrix with MX at the end of its name). Can anyone confirm this for Cyrix owners? If it runs on your Cyrix, which EXACT model are you using? FWIW, It runs GREAT on my AMD K6 233 OC'd to 262.5 with a V1000 card. Alan http://www.kiva.net/~akh/simshop.html > I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the > program. Has anyone been able to run it on a Cyrix processor? > --
> I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the > program. Has anyone been able to run it on a Cyrix processor? > -- I have seen 1 post from a 233 owner who had no probs. The rest seem to be a no go.
SBeshe 09 Apr 1998#403583
with nascar2 i have to turn cpuid off. runs fine after that.
The FPU wouldn't have anything to do with the game crashing. It would just run slower than on an Intel or AMD chip.
Quoted text (16 lines)> On 8 Apr 1998 13:18:33 GMT, "John Hartridge" > >What have Papyrus/Sierra got against the Cyrix processors - > >the Nascar 2 demo wouldn't work with a Cyrix processor > >either, even though the final version does ? It can't > >be that difficult to make the code work with both straight > >off, is it ? You don't end up with two executables with > >the final versions - so why don't the demos work ? > >John > Cyrix has a lousy FPU....nuts, and I work for National > Semiconductor, too..... > Jeff
-- Bringing up the rear in the 1998 F1RS Racing League ... http://ourworld.compuserve.com/homepages/as/f1rl.htm http://www.wenet.net/~josefk/f1rl/
Quoted text (9 lines)> >What have Papyrus/Sierra got against the Cyrix processors - > >the Nascar 2 demo wouldn't work with a Cyrix processor > >either, even though the final version does ? It can't > >be that difficult to make the code work with both straight > >off, is it ? You don't end up with two executables with > >the final versions - so why don't the demos work ? > I'm just wildly guessing, but I think they have a routine that checks > for the processor type during game start-up
This, I suspect is probably correct. This I doubt. I expect they just make the program bypass the cpu detection routine. -- Bringing up the rear in the 1998 F1RS Racing League ... http://ourworld.compuserve.com/homepages/as/f1rl.htm http://www.wenet.net/~josefk/f1rl/
I think I must be the only person in the world who has GPL running on a Cyrix Chip. PR233MX, R534a M-Tech Motherboard, 64MB EDO, Matrox Mystique w/2MB, MaxiGamer 3DFX Voodoo w/4MB, SB16 SCSI, T-2 using CH pedals, hmm....guess that is all that is relevent. I have my old P200+ (non-MMX) here too. Maybe I will put it in this weekend and see if it works still. Runs fine, all detail on. HTH, will post results if I get around to checking the 200+ Ralph Williams
Quoted text (21 lines)> Just a guess on my part, but since I saw one report of GPL working on a > CYRIX (a MX version) I imagine that it is only the older run of > processors that have the problem. That doesn't mean if you just bought a > 166+ it would work, but rather the newer design that includes the MMX > instructions (a Cyrix with MX at the end of its name). > Can anyone confirm this for Cyrix owners? If it runs on your Cyrix, > which EXACT model are you using? > FWIW, It runs GREAT on my AMD K6 233 OC'd to 262.5 with a V1000 card. > Alan > http://www.kiva.net/~akh/simshop.html > > I have a Cyrix 6x86 166+ processor, and GPL demo crashes when starting the > > program. Has anyone been able to run it on a Cyrix processor? > > --
Jim Sokolo 12 Apr 1998#404154
> The FPU wouldn't have anything to do with the game crashing. It would > just run slower than on an Intel or AMD chip. And GPL is FPU intensive, so even though the release version will undoubtedly "work" with the Cyrix chips, the 6x86 without FPU will make the game crawl. ---Jim
Jim Sokolo 12 Apr 1998#404155
> > and then branches. One > > part of the code is optimized for Cyrix, another for Intel. > This I doubt. I expect they just make the program bypass the cpu > detection routine. What on earth would be the purpose of doing CPU detection? If you never did anything different based on the answer, why bother to ask the question? Joystick reads can be made more exact by using the Pentium RDTSC instruction, which is not supported on the early Cyrix chips. ---Jim
On Sun, 12 Apr 1998 13:52:39, "Jim Sokoloff" I have said this before. I am running GPL demo on a Cyrix PR233MX with a MaxiGamer 3DFX card. (I think without a 3DFX card GPL will "crawl" on any xx86 computer made at this time) It runs great. I can see a slight slowdown when lots of stuff is happening at 800x600. By this I mean, if I am crashing on certain places on the track. In normal laps there is no slowdown whatsoever. If I have time today (doubtfull) I am going to put a Non-MX Cyrix chip in and see if it runs. Jim, the Cyrix *has* a FPU. It also appears the joystick driver is fixed for the Cyrix compared to the one that is in N2. Don't know as I can't compare it to an Intel, but it does seem to work fine. I don't know about anyone else...this is my experience. It does not "crawl". Ralph Williams
Quoted text (8 lines)> > The FPU wouldn't have anything to do with the game crashing. It would > > just run slower than on an Intel or AMD chip. > And GPL is FPU intensive, so even though the release version will > undoubtedly "work" with the Cyrix chips, the 6x86 without FPU will > make the game crawl. > ---Jim

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