I have 3 Engineering sample socket 370 CPUs: a Coppermine Celeron 1.1Ghz, a Coppermine-T Pentium III 1.0Ghz (with heatspreader) and a Tualatin Celeron 1.4Ghz.

The Coppermines are operational and fully unlocked, I'm testing it on an Asus CUVX, both are OK overclockers, I haven't pushed much, but I can do 133Mhz x 9 = ~1.2Ghz on both.

Unfortunately I don't have a socket 370 motherboard that supports Tualatin to test the 3rd one.

Of course the point of my experiments were to try to slow down this CPUs, lowering the multiplier to see if I could bring it down to play speed sensitive DOS games.
Since the CUVX motherboard have an ISA slot this would be a great all round machine for DOS games all the way to high end Win98 if I could make it work.

The problem I'm facing is that I can't select the lower multipliers available on the MB BIOS (see the highlighted values in the picture attached).
If I select 2.5x it goes to 9.5X and etc. The minimum I can select is 5.5X.

So the question is, is there a way to force the lower multiplier value on the left side of the table?

Thanks