https://theretroweb.com/motherboards/s/intel- … ation-l486-pba-
and try google it for info there are tons of info

Buy it a week later? 😉

Still can't find where the pc speaker is located and where to find the EISA Utility

Since there's no wires in that system for the front panel, my guess is that the PC speaker is located inside the power supply possibly?
That's probably why the PSU connector has extra pins, it would need them to add speaker, LEDs and reset buttons.

Very similar to your PC, they should be products of the same series.
https://www.youtube.com/watch?v=fK7QMAX0BmQ

"Technical Product Summary Professional/GX Workstations"
This will help you, but there's bad news, it's an ancient Word 2.0 format document.
https://drive.google.com/drive/folders/1KyC7M … ?usp=drive_link

NSI5922 wrote on 2023-11-17, 19:26:

Still can't find where the pc speaker is located and where to find the EISA Utility

Although the GX support docs don't mention it (unlike for the plain 'Professional' - quote follows) and as Thermalwrong suggests, guess the internal speaker is indeed built into the power supply.

"The on-board speaker has been integrated into the power supply to improve manufacturability and reduce unnecessary
cabling. The speaker may be enabled or disabled using the BIOS SETUP program and may also be programmed using I/O
port 61H. The speaker provides error code information during POST if the system cannot use the video interface (see the
appendix for beep code information)."

Could be faulty or maybe try either the plain 'Professional' keystroke volume...

"CTRL-ALT-+ and CTRL-ALT--: Keystroke Click Sound level selection.
This adjusts the speaker level for the click sounds made when a key is depressed. The level of sound may
be adjusted from not audible to loud with 7 levels in between."

...or just plug external speakers into the 3.5mm line-out (which automatically disables audio from the internal speaker) and see if that works.

Also, this seems to be the EISA config utility and config files you need (from mR_Slug's archive site)

from zwrr's doc "The second jack provides a stereo line-out. A built-in leaf switch automatically disables audio from the internal speaker when a cable is plugged into the audio output jack. However, standard PC "beeps" are still heard through the internal speaker; and are not sent to the output jack. If nothing is plugged into the output plug, both standard PC "beeps" and audio output can be heard from the internal speaker."

added: page 24 shows a possible PSU pinout (for Intel Professional Workstation LP series), you could use a Digi meter to verify the pinout....
https://www.elhvb.com/mobokive/Archive/Intel/ … kstationtps.pdf

Beginning to have my doubts re the EISA files I posted earlier (more so the cfg / ovl files rather than the ECU itself). Having watched the full 3 part video series, starting from the zwrr link, it seems the poster used the same files successfully on his earlier model 'Professional' system - would seem odd if the same ones also covered the later GX as well given that components have been added / changed on the system board (notably the flaky NCR SCSI chip for an Adaptec one), but they're the only ones obvious to me on mR_Slug's archive site.

Also seems Intel support for these generally troublesome systems was poor during their short lifecycle (the videos comment on this and I found a number posts on the old Intel Google Groups of people failing to find these same GX EISA files thru Intel support back in 1998! )

Agree that INT3061 is not probably for the board as the cfg says LP486E board...
Am wondering if the INT30A1 L486 Series System Board or INT30A9 L486 Series System Board eisa cfg's might work....(at mr slugs, those with INT prefix are intel based afaik)
CFG Internals refer L486 series with two EISA slots (like the riser), 486 cpu, onboard ide, scsi, video, 64k or 128k cache, etc....and there is a cache simm socket

A curious thing... a few days before this thread popped up I had bought this same motherboard since it looked interesting and novel for the price, which it is.

I've been working on getting it running and can confirm that the pinout for the PSU in the manual is almost correct, with one glaring error:

1. RAWST - seems to be N/C, can't figure out what the acronym means
2. 5V
3. 12V - for serial ports I think, small traces on this one
4. -12V
5. GND
6. GND
7. GND
8. GND
9. -5V
10. 5V
11. 5V
12. 5V
13. 5V
14. 5V
15. GND
16. GND
17. 12V - Big fat trace, this powers the hard drive through the riser slot by the CPU. This is where the mistake was, it says -12v in the manual, it is not.
18. HD LED
19. RESET BUTTON
20. SPEAKER AUDIO

OP or anyone else that has this machine, could you please post a hi-res picture of the riser card that connects the hard drive and floppy drive? That's the slot by the CPU rather than the EISA slot. Specifically the side with the floppy drive connector, I have a sufficiently hi-res image of the IDE/SCSI plug side.
I'm currently working out the pinout for the riser slot but it's slow going because I'm working from a freeze frame from a youtube video that was hi-res enough to see what's on the side of the card with the SCSI / IDE connectors. This board's got so much stuff buffered and not directly connected that it's tough to work out what the SCSI signals are so I can work out what the IDE signals are.
At this point I'm pretty sure I've got the floppy drive part of the riser all correct - it's got an interesting design choice too - the floppy drive Write Protect signal doesn't even route from the controller to the drive, instead it only goes to the Floppy Write-Enable (FE) jumper. That should mean that if that jumper is set to enable then you can over-write floppy disks regardless of whether the write-protect switch is on the disk or not 😀

If I can connect a hard drive to this board then I can also help in the effort to find which EISA config utility works. It's posting and working but I can't do much else with it currently.