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Rec.Autos.Simulators Archive

"Clock smashes" in gpl 1.1

8 posts by 5 people · 16 Jul 1999 - 20 Jul 1999

Damn! First clock smashes in Practice mode with 1.1 tonight. J. P. Hovercraft Pentium 200 MMX clocked to 166 64 Meg RAM 200 meg free space on C, 450 on D (where gpl is) Orchid Righteous 3D Voodoo 1, current 3dfx reference drivers ATI Graphics Pro Turbo PCI Yamaha OPL-SAx D-Link DEC 21041 PCI Ethernet DirectX 6.1 Changes from core.ini.sample (re-named to core.ini) clock_adj_delay = 16 synch_method = 0 disable_modem = 1 These changes seriously reduced the number and severity of clock smashes from the original 1.1 patch without the re-named core.ini.
Rubini 17 Jul 1999#481026
so instead of getting hot it freezes itself!!! doubles up as a handy beer cooler
Uh...because the mobo -will- support Pentium 200 but -not- Pentium 200 MMX. It sees it as a 166 MMX in spite of the fact that I've got it jumpered to 200. Contacted the manufacturer and this is the only solution short of a new mobo. It has not caused any problems in any games/applications. I traded for the 200 MMX so it didn't cost $ and the MMX significantly increased performance in Unreal. Got a Socket 7 mobo you don't need?....8^) J. P. Hovercraft ---------- > >Pentium 200 MMX clocked to 166 > Why the hell would you underclock your pc?
This is really odd. I just checked this: the jumper settings for the "classic" P200 and the P200MMX are identical. Therefore, if you can set the mainboard to run a P200 at 3x66MHz, this should work with the P200MMX as well. Maybe the board is just reporting a wrong speed (old BIOS), but the processor is indeed running at 200 MHz? Otherwise, it is possible that one of your jumper caps is broken. If you have a "newer" iP200MMX, it will only recognize multipliers of 3 and 2.5. Now, if you try to set a different multiplier (say, 3.5 or something), the chip will default to 2.5. If one of your jumper caps is broken, the CPU might interpret the setting as an attempt to overclock and default to the low setting. Try and replace your multiplier jumpers and see what happens. Only broken ones, unfortunately. :) However, if you have some small change to spare, you might consider getting an FIC VA 503+ board. It's for sale for as little as US$ 50.- these days. The board allows you to keep using your old RAM and components while running at 100 MHz FSB. I use one of those boards in conjunction with an iP166MMX, which I overclocked to 250 MHz about one year ago. It is very stable. If your processor is actually running at 166 MHz now, you should see a performance gain of at least 50% for a very small sum. Makes one think, doesn't it? :) -- Wolfgang Preiss \ E-mail copies of replies to this posting are welcome.
Don Hancock 19 Jul 1999#481449
>>Uh...because the mobo -will- support Pentium 200 but -not- Pentium 200 >>MMX. It sees it as a 166 MMX in spite of the fact that I've got it >>jumpered to 200. Contacted the manufacturer and this is the only >>solution short of a new mobo. It has not caused any problems in any >>games/applications. I traded for the 200 MMX so it didn't cost $ and the >>MMX significantly increased performance in Unreal. The jumpers on his board could also modify the voltage levels, too. MMX CPU's had dual voltage, non-MMX may or may NOT have dual voltage. If he jumpered it as a 200 it wouldn't supply the correct voltage to the CPU. Gunner
> The jumpers on his board could also modify the voltage levels, >too. That would be extremely stupid - which is not to say that no manufacturer could have implemented such a stupid system. :) Not exactly: There were Pentium VRE, which had 3.5/3.5v (core, I/O) and Pentium STD, which needed 3.3/3.3v. No split voltage, only different overall voltage. The Pentium MMX required 2.8/3.3v. If the board recognized the CPU as VRE or STD, it would supply a voltage above the requirements of the MMX. It doesn't matter whether it's jumpered at 2.5x or 3x (166 or 200). -- Wolfgang Preiss \ E-mail copies of replies to this posting are welcome.
Thanx for the defense, Don! ... 8^) Actually, the voltage jumpers are a seperate setting, as are the P54 (non-MMX) and P55 (MMX) jumpers. The voltage jumpers are set for the dual voltage required for the MMX chip. I had to visit the chip ID site to make sure of the required settings. The clock jumpers are set for the 200 MHz clock, but the system -still- sees the chip as a 166 MMX. J. P. Hovercraft -----------------
Quoted text (13 lines)> >>Uh...because the mobo -will- support Pentium 200 but -not- Pentium 200 > >>MMX. It sees it as a 166 MMX in spite of the fact that I've got it > >>jumpered to 200. Contacted the manufacturer and this is the only > >>solution short of a new mobo. It has not caused any problems in any > >>games/applications. I traded for the 200 MMX so it didn't cost $ and the > >>MMX significantly increased performance in Unreal. > The jumpers on his board could also modify the voltage levels, > too. MMX CPU's had dual voltage, non-MMX may or may NOT have dual > voltage. If he jumpered it as a 200 it wouldn't supply the correct > voltage to the CPU. > Gunner

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