OK... you know how some Pentium (Socket 7 era) motherboards supported soft CPU settings to control FSB, multiplier and voltage?
Those "Soft CPU" seemingly don't make their way into the versions of MR BIOS for those motherboards. Is there a stand alone utility for DOS that bridges the gap?
Thank you!
Are you using a generic MR BIOS for the chipset application? Or is it for that exact model motherboard?
kingcake wrote on 2024-01-26, 23:39:Are you using a generic MR BIOS for the chipset application? Or is it for that exact model motherboard?
The board is a PM-9500 AMPTRON (but is known as a couple of other models)... which uses a TX chipset, and according to the MR BIOS archive here on Vogons, uses MR BIOS 3.46.
If you flash that BIOS to the board, there are no settings available to configure the Soft CPU functionality... it just resets to a default setting of either 120Mhz (166Mhz... can't verify at the moment).
I don't know where did you got this MR BIOS archive from, but if your motherboard doesn't have an options to manually set (by combinations of jumpers) voltage, bus frequency and multiplier for the CPU, it's obviously not a good idea to use some "chipset-universal" 3-rd party BIOS that also doesn't offer such an options.
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Yep. Clock gen circuitry (PLLs on boards like this) isn't integrated into the chipset, so the specific PLL needs firmware support for what you want.
There are tools for later boards, but not aware of any DOS tools for this era.
analog_programmer wrote on 2024-01-27, 08:21:I don't know where did you got this MR BIOS archive from, but if your motherboard doesn't have an options to manually set (by combinations of jumpers) voltage, bus frequency and multiplier for the CPU, it's obviously not a good idea to use some "chipset-universal" 3-rd party BIOS that also doesn't offer such an options.
I 100% agree... I was just experimenting with an extra board I had to explore what MR BIOS looked like.
dionb wrote on 2024-01-27, 09:21:Yep. Clock gen circuitry (PLLs on boards like this) isn't integrated into the chipset, so the specific PLL needs firmware support for what you want.
There are tools for later boards, but not aware of any DOS tools for this era.
Thank you for the information.
