Here is the BIOS update info for that board:

1Bios-Update history for HOT-613 Mainboard
2==========================================
3Attention:
4This file may not be up to date.
5We are not liable for any damages caused by the bios-update.
6
71) Check programming voltage of EEPROM
8   JP15 1-2: 12V  (Intel and MX Chips)
9   JP15 2-3:  5V  (generally: others than Intel chips)
102) Do not load any memory manager.
113) Start DOS and execute: AFLH52B <BIOS file name>
124) After programming, turn off your system for a moment.
13
14The <Bios-Filename> depends on the I/O-Chip (U48) of the onboard-controller.
15
16          613WUQ09.BIN   UMC-I/O-Chip 
17          613WIQ09.BIN   ITE-I/O-Chip
18
19613WIQ09.BIN & 613WUQ09.BIN
20     add ZIP ,large size HD
21
22613WIQ0A.BIN
23     dual processor bugfix
24
25613WIQ0B.BIN
26     fix cannot assign PCI-IRQ

And the BIOS downloads are here:
https://www.shuttle.eu/_archive/older/de/bios … les.htm#sockel8

Doesn't look like the single and dual socket boards use different BIOSes.

Any luck getting the second cpu detected?

No luck on the 2nd CPU being detected. I had already tried the BIOS update. I'm just going to wait on some pictures of a dual socket board so I can see jumper settings. I don't want to damage anything by accidentally jumpering the wrong connections.

Looking forward to an update - very interesting!

Interesting project, I hope you eventually get it working with that second processor!

moaaaar updatesssss
(just found this—pretty cool stuff!)

Stuck until I at least find some good photos of a real dual board. Project is shelved for now, but I check continuously for sale postings since that is probably the best hope I have to see a real board.

Hope the 2nd CPU is getting detected, Nice Stuff!

<Spongebob: ONE YEAR LATER...>
Huge update..

I had a dream a few nights ago that I messed up the soldering on the Intel S82093AA chip. Well, I went back today and checked it -- sure enough, I had one leg that was ever so slightly bent and not making contact with the pad. I carefully bent it back down and reflowed it.. now it works!!!! No secret jumpers, no special BIOS, nadda. Just add the socket, capacitors inside the socket area, VRM header and VRM, and the S82093AA chip.

So if you want to get a dual Pentium Pro out of this board, you just need to follow what I did in this thread. Case closed.

Here it is on the test bench with 2x 200MHz PPro's, 128MB EDO RAM, and an ATI Mach 64 ISA (lol).

That's some amazing work, gz!

Awesome! Congratulations on your success! 😃

Woohoo!!! Nice!!! Congratts!

They made a single processor version of my board also. But luckily I have the dual version hehe

Lot of delicate work. Good job!

clean solder job too!

Very cool!

This is beyond cool and it's so surreal that you had a dream about it that led you to the discovery of the issue. Well done!

Congratulations !! 👏

Noticed solder blobs on the pcb near the chip you had to add. May wanna grab those before they wander off.

Yea that picture was before I cleaned the board just after soldering. Everything cleaned up nicely.

Now to build this into a case.. I have a 3-digit MHz display in a beige case that should suit it well. Any recommendations on an OS? Windows NT4? Some early variant of linux with dual CPU support?

SWEET! I'm glad you were able to get this solved. I can't wait to see the finished system now.

wiretap wrote on 2021-03-04, 13:07:

Yea that picture was before I cleaned the board just after soldering. Everything cleaned up nicely.

Now to build this into a case.. I have a 3-digit MHz display in a beige case that should suit it well. Any recommendations on an OS? Windows NT4? Some early variant of linux with dual CPU support?

funny you should ask I'm going through the same fun at the moment, try server 2003 standard r2 see if it works. it has gpt support and pressing f5 at startup on it or xp/2k/mce should bring up a menu with mps multiprocessor as a option

as for linux try debian jessie followed by older versions if that doesn't work jessie works on my k6 but not on my dual 233 mmx so wheezy might be the trick. use one of those xlcs xfce whatever desktop environments I for get their exact name but you'll know when you see the options. the other options will be slow.

btw, order 4 128mb sticks from ebay for that thing. there is a set for sale of some hp sticks that are registered and buffered right now

server 2003 didn't work for me it bluescreens after first reboot but windows media center edition and xp sp3 seem to work alright

for storage pickup a promise tx4 300 card I've had great luck with booting to them and great speed from them

if you get the chance, dump the bios and open it in awdbedit if you see a acpi table let me know and we can probably stick windows 7 on that thing I have a Iso file that will work with les than 512mb of ram but you won't need it if you pick up that ram

as for doing things I haven't been able to beat 7 I am constantly using it to rescue the other operating systems on my k6 build 🤣 I wish my dual pentium had acpi cause I'm pretty sure it would run very nicely on it

can't stress enough how impressed I've been with 7 if you have acpi try it.

also, look into pentium pro over drives on ebay you can bump that up to a 333mhz pII I think

check out my signature for the dual socket 7 build