Hello,
I will stick to the topic. I bought this motherboard because I had one in my childhood.
For starters, please enter the correct model so I can update the bios. Is my model M537DMA v5.2A?
What's the last bios, maybe a modified one?

I read a bit and when looking for a bios I found something like this, it describes how to mount an AMD 266+ processor on this board.
There is also some bios file here, but won't it break my motherboard? rar file

DeadMan274 wrote on 2022-11-03, 09:50:

Hello, I will stick to the topic. I bought this motherboard because I had one in my childhood. For starters, please enter the co […]
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Hello,
I will stick to the topic. I bought this motherboard because I had one in my childhood.
For starters, please enter the correct model so I can update the bios. Is my model M537DMA v5.2A?
What's the last bios, maybe a modified one?

I read a bit and when looking for a bios I found something like this, it describes how to mount an AMD 266+ processor on this board.
There is also some bios file here, but won't it break my motherboard? rar file

Hi there!

I made various trying to flash that damned bios but I never did it cause the awdflash programs always said me that it can't erase bios.

So I gave up, ended that my bios isn't writable. A big shame.

Let me know if you could do something, I am very interested.

I don't even say anything. I have the same problem. I am looking for info...
What's wrong with this motherboard?! 🥴

It appears that chip isn't programmable, so to update the BIOS you'll need to replace it. See this post: Re: Pc Chips bios upgrade M537DMA v5.2 AWARD BIOS

DeadMan274 wrote on 2022-11-14, 21:39:

I don't even say anything. I have the same problem. I am looking for info...
What's wrong with this motherboard?! 🥴

Yes, it's absolutely strange for me, never found a motherboard with the bios that isn't programmable, you have simply to REPLACE it with another one programmable EEPROM.

I didn't did it, I will simply sell this motherboard for who want an older system with 486 or the first Pentium with no MMX instruction (it appear that when I put processors with MMX it didn't boot).

Unfortunately this is the sad situation. Damn PC Chips.

I have a pentium MMX 166 and 233 and they both work on this motherboard with 1997s bios. I have two shops / services that deal with programming bios. I will order a chip with a new bios, hope it works. And the old one will be a backup copy.

DeadMan274 wrote on 2022-11-17, 16:16:

I have a pentium MMX 166 and 233 and they both work on this motherboard with 1997s bios. I have two shops / services that deal with programming bios. I will order a chip with a new bios, hope it works. And the old one will be a backup copy.

Hey, let us know how your story finishes.

I just bought two old systems yesterday, and when I was going to look inside I found a nice surprise! I have another one PC Chips M537DMA v.5.2A motherboard!!!

Exactly the same one of this thread! The same version, the same bios! I take a photo about the boot page and I can assure you that I have the exact bios!

Anyway I'm quite surprised, cause in this newer system that I have just bought, a Pentium 200MMX was running fine, overclocked to 225MHZ. Mine one can't boot with MMX processors, neither the AMD K6 200.

So first try I did is to swap the famous bios chip, to see if my "old" board was able to boot with the Pentium 200MMX. No. No boot.

I am thinking that my motherboard isn't fully ok, and as one user said here, probably it could have voltage problems. It's strange infact that to run a P133 I have to set the jumper to p55C processors, instead of setting it to P54C processors.

I can try to flash the bios that wasn't able to flash it through the new motherboard that I caught yesterday? Or the chip wasn't simply flashable?

We'll see.

I attach you the photo of the two boot screens.

Give me more ideas, thanks. And deadmen, let me know how's going with your card. I'm interested.

I fit can't boot with MMX then you probably have voltage regulation issues.
Before you try flashing BIOS in other motherboard, maybe try swapping BIOS chips and check if your previous board works with it, and then if it can boot with MMX.

smoke86 wrote on 2022-11-28, 08:05:

I fit can't boot with MMX then you probably have voltage regulation issues.
Before you try flashing BIOS in other motherboard, maybe try swapping BIOS chips and check if your previous board works with it, and then if it can boot with MMX.

I did it immediately, but the result is the same. No boot.

Then I have to think the motherboard is voltage faulty?

Probably, but you can't be sure unless some measurements are done.