I think the Intel PR440FX should be a safe bet.

It will also let you overclock the CPUs to 5x70 = 350 MHz.

Don't ditch that Megastar board just yet, this might be a BIOS problem. Check what you are running and see if you can find a newer one. I see a v4 on various sites. Worth a try at least.

I only found the TI6NFK2.ROM which is dating back to 05.06.1997. It is little old, where did you see that v4?

Here:
https://www.cc-solutions.com/drivers.html

TMC TD6NF BIOS - (1/4/99)
(Fixes boot-up problem when using dual 150MHz CPUs)

No mention of Overdrive CPUs, but 99>97 so worth a try at least.

Thanks! I will flash it, once I figure out how to do it! Than I get back to this forum...

Atom Ant wrote:

Thanks! I will flash it, once I figure out how to do it! Than I get back to this forum...

If you're not familiar with flashing, take care. The .exe download on that site gives you the flash program amiflash.com and the td6nf4.rom file - and a .txt with instructions that gives lots of fluff but misses the important bits:
- always flash from the most basic DOS environment you can. So no Windows, preferably no memory managers or other stuff. If you don't have that available on the computer's HDD, boot from a boot disk.
- always have the flash program and image to be flashed on HDD, not floppy.

After that it's as simple as amiflash td6nf4.rom

Skyscraper wrote:

I think the Intel PR440FX should be a safe bet.

It will also let you overclock the CPUs to 5x70 = 350 MHz.

I did get my Intel pr440fx motherboard, instead flashing the bios on the other one. However I do not understand the ISA, PCI layout on this motherboard. Seems I cannot use the bottom PCI slot, how is that possible? Is that normal by this motherboard or I have the wrong house? See my attached picture of the problem...

Atom Ant wrote:

Skyscraper wrote:

I think the Intel PR440FX should be a safe bet.

It will also let you overclock the CPUs to 5x70 = 350 MHz.

I did get my Intel pr440fx motherboard, instead flashing the bios on the other one. However I do not understand the ISA, PCI layout on this motherboard. Seems I cannot use the bottom PCI slot, how is that possible? Is that normal by this motherboard or I have the wrong house? See my attached picture of the problem...

This is normal, most PCI + ISA motherboards have one PCI slot that is shared with the top (and in this case only) ISA slot.

3 usable PCI slots + one ISA slot isn't too bad as the PR440FX (at least the retail version) has both onboard USB and NIC, even the onboard Crystal CS4236 audio isn't aweful for non DOS-gaming use.

That's normal, as Skyscraper already explained. Reason being that the spacing between the slots is fixed, but ISA cards face up, whereas PCI cards face down. So there's a clash at some point where you have only one bracket for two slots.

Ok, thanks, i feel myself better than. Good, that I did not started with the bottom PCI slot adding cards, because I would think it is impossible to add the ISA Soundblaster.
Slots will be just enough even for a Voodoo 2 SLI configuration.

Can I bring this thread back from the dead to see if anyone has had any luck flashing that BIOS onto the TD6NF?

I have that board, and when I attempt to run "amiflash td6nf4.rom" from a clean DOS 7.10 environment (real mode, no drivers at all), it opens amiflash and just blinks the prompt for "press Y or N to continue" (don't remember the exact wording). Pressing Y nor N does anything, the only way out from there is to turn the PC off.

in case anyone is following: I got the BIOS to flash by putting the files on a DOS 6.22 boot disk

not sure if it was DOS 7.10, or the fact that the rom was on a hard disk that was messing it up, but it worked fine from the floppy

For extra care (and not mess up the original bios) i always have a board around to do a hotflash and some extra bios chips from old boards, i mostly used a basic intel 430TX based board for that.
Using the program ''uniflash'' you can program almost any bios file.

Nowadays i use an eeprom flasher, to make life even more easier.