Wow, amazing board you have there! It even has SIMM sockets and VLB 😁

I'm almost 100% certain I don't have anything similar. Oldest boards I have which should be in working order are a couple 386 boards (they 'should' work as I got them complete NOS years ago and made sure I snipped the barrel batteries before I put them back into storage and even those didn't have VLB I think).

Sorry I couldn't be of more help.

it would be very intressenting how VLB works on this System, maybe it does use some type of multiplexing break down 32bit Bus to 2 Chunks of 16bit ?!?
Does it support asynchronus FPU ?

http://old.pinouts.ru/Slots/VLB_pinout.shtml -> table for ID0-ID4

It appears VLB can support 16 bit natively.

Also got this motherboard. It has standard AMI bios, but with many features.

Did some benchmarks with it.

- upgraded cache to 128KB
- fastest BIOS settings
- VLB ARK1000VL 2MB VGA card
- 4MB RAM

@2x33=66MHz:

3DBench 1.0c... 34.2
Doom... 4569

@2x40=80MHz:

3DBench 1.0c... 41.1
Doom... 3806

CPU has heatsink but it's really hot (even at 66MHz). So I put a 12cm fan over the motherboard to cool it.

Main memory is really slow. Otherwise it's quite fast.

Wow, you even overclocked it to 80MHz. In theory it should hold up, as the SLC2 internally supports 3X (enabled by software) and was originally designed to clock up to 100MHz.

I had one of these boards in my collection, too. It had the 50Mhz chip and I was unable to overclock it to 66Mhz. No matter what timings I set in the BIOS, it crashed in applications. so I don't think that the 3x multi possibility directly correlates with a good overclocking capability. I'm pretty sure IBM selected the CPUs.

@kixs: Was it just a different jumper setting to get to 40MHz bus speed?

I should get my hands on a 66MHz variation soon, it would be exiting to test it @80MHz 😀

I am bumping this after 2 years 🤣 just in case anyone here happened uppon this mobo with a MR-BIOS rom
Got this mobo today 😀

Welcome to the club 🤣

@FGB: I guess I didn't see the thread updated... look here for jumper settings, I guess I tried the other options, can't say which now as I don't recall. But it's left all OPEN and all CLOSED on JP7 & JP8.

https://stason.org/TULARC/pc/motherboards/A/A … SLC2-REV-C.html

any positive results with MrBios? 😀

I have a pc with this same motherboard and bios! I don't know how to use these old computers though, so I am trying to learn how to even figure out how to set it up. Sorry to necro this thread but I just found it and find myself curious if you ever found the bios you were looking for.

No, I am pretty sure the MR BIOS for this board hasn't been found. But, I am fairly certain it exists.

Hah, one just came into my hands. AMIBIOS though.

Anyone remember which jumpers were used to change the bus speed to 40 MHz? STASON shows jumpers with "factory settings, do not alter" - real useful 😉

Anonymous Coward wrote on 2020-11-01, 13:20:

No, I am pretty sure the MR BIOS for this board hasn't been found. But, I am fairly certain it exists.

Hi, were you able to acquire a MR BIOS for this board?

No, this BIOS image is surprisingly still missing.

Anonymous Coward wrote on 2023-01-22, 09:49:

No, this BIOS image is surprisingly still missing.

I have hoarded over some time an extensive collection of MR BIOSes. I just purchased the board with AMI and looking forward to an upgrade, but since I paid a lot of money for it I am afraid to ruin it on the very next day. Is there anything in particular, that would allow me to pinpoint correct version of MR? A string inside the rom?
If you have an advanced knowledge and/or resources to play with and a know-how , to protect yourself from bricking the board I could upload a rom candidate that look promising in my opinion. LMK.

Anonymous Coward wrote on 2023-01-22, 09:49:

No, this BIOS image is surprisingly still missing.

What about MR-BIOS release for rev. A of this board? Would it work?

Swapping the ROM BIOS presents almost no risk. If you have a rev A BIOS it might work on a later board revision. Can you upload the ROM?

Anonymous Coward wrote on 2023-02-01, 05:59:

Swapping the ROM BIOS presents almost no risk. If you have a rev A BIOS it might work on a later board revision. Can you upload the ROM?

https://theretroweb.com/motherboards/s/alaris-leopard-rev-a

I spent hours going through my library of MR-BIOS images and yet, I think the best candidate was out there at least since November 2022. Let me know if it works. I am still waiting for my board to be delivered.

Everything works fine