Gj on the hotflash! I'm lucky in that I haven't bricked a board while attempting to flash (mostly because I've flashed only a handfull boards in my life for fear of bricking one for no really good reason).

So whats your fastest Cyrix you have atm?

Tetrium wrote:

So whats your fastest Cyrix you have atm?

It's a 6x86L (Less voltage / Heat) PR200+

It's rated at 75x2 and I did manage to run it at 83x2 but not any higher.

I got my eyes on a PR300+ model which I am hoping will take a setting of 100x2 so I can see what the Cyrix chip can do with L1 cache enabled.

So far the 6x86 is the fastest chip around once you disable L1 cache. It beats the K6-2 by quite a marging although it's clocked so low.

Mau1wurf1977 wrote:

It's a 6x86L (Less voltage / Heat) PR200+ […]
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Tetrium wrote:

So whats your fastest Cyrix you have atm?

It's a 6x86L (Less voltage / Heat) PR200+

It's rated at 75x2 and I did manage to run it at 83x2 but not any higher.

I got my eyes on a PR300+ model which I am hoping will take a setting of 100x2 so I can see what the Cyrix chip can do with L1 cache enabled.

So far the 6x86 is the fastest chip around once you disable L1 cache. It beats the K6-2 by quite a marging although it's clocked so low.

The PR300 runs at 233 or 225Mhz though!
If you want a Cyrix M2 running at 300Mhz, you should look for a PR400 or so (2.2V part) and hope it will overclock.
Example on cpu-world.com:

I got a couple 333's rated at 250Mhz I think. Most important is they be 2.2V parts (not 2.9V, those will run HOTTT).
I got a couple at cpu-world.com forum. Haven't tested any of them yet though!

Sorry I wasn't clear enough...

For my needs (slowing down fast machines through disabling L1 and L2 caches) the main thing that matters is the FSB. As long as I can run the chip at 100FSB (no matter what the multi is) it will perform similar. E.g. with caches disabled a 100x2 chip will perform almost the same as a 100x5 chip!

EDIT: I am assuming that the Cyrix have a unlocked multi? Just like Pentium and K6-2?

If you are trying to downgrade the system speed for gaming, I've noticed a better stability when the bus speed is set to 66MHz, while playing old games. (No lockups/crashes etc.)

Also, try using Universal Flasher for hotflashing.

I second malik. Before you go gung-ho on fsb 100, try playing aces of the pacific with a calibrated joystick.

The system requirements for this game state only a 386SX so this game should play fine with a lower setting (as you can see on my table) here. The Cyrix @ 75MHz FSB performs like a 486DX2, very likely way to fast for this old game...

The 100MHz FSB setting with Cyrix ist mostly because I am interested in what equivalent cpu it will give me and also to complete my data set. I am hoping it would take me to a 486DX4-75 which is handy for some of the more demanding DOS games.

All the games I wanted to be able to get going, run perfectly so from that point of view my project is completed. Now it's about getting more data, reducing the tables a bit (FSB scaling is much more useful compared to the last table I used) and publishing the results.

Intel Pentium CPU will also follow soon!

Yes I heard of uniflash, however I had the correct version of awardflash because it came with the mainboard CD so it all worked out!

I will need to get a joystick though, that's a good idea. I was thinking of a MS sidewinder because of the optical tracking and there also plenty of ebay.