Video Card: Actix GraphicsEngine 32+ VLB 1Mb, GraphicsEngine 32VL, GraphicsEngine 32VL Plus... something like that. 😀

Motherboard: Nice photo here:
http://ecx.images-amazon.com/images/I/A18pPru … bL._SL1500_.jpg
You can make out the jumper settings screenprinted on the PCB.

Good news: EFA's website is in the Internet Archive and you can get latest BIOS:
http://web.archive.org/web/20010208085909/htt … wnload/bios.htm
(second source: http://www.updrivers.com/bios/Motherboard/EFA … -BIOS/8506.html )
You can also get a "jumper setting program": http://web.archive.org/web/19990508181948/htt … oad/jumpers.htm
Download links seem to work too! 😀
According to this, you need GOEFA: http://www.hardwarecentral.com/showthread.php … -Identification
Haven't found a manual yet but I haven't been trying hard.

Thank you!

Love how the VLB slots are labeled MCA. Well it technically is a 16-bit MCA slot edge connector 😜

I know this is an old thread, but this will hopefully help someone out. The 4DMU-HL3S is also known as the 4MHL3S.

Jumper settings are available here:
https://stason.org/TULARC/pc/motherboards/E/E … 486-4MHL3S.html
http://www.win3x.org/uh19/public/motherboard/ … anual/31754.pdf

Mine came with (a poor photocopy of) the manual, which I've scanned and uploaded to archive.org here:
https://archive.org/details/efa-4mhl3s-4dmuhl … herboard-manual

1nanoprobe wrote on 2021-07-21, 05:50:

I know this is an old thread, but this will hopefully help someone out. The 4DMU-HL3S is also known as the 4MHL3S. […]
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I know this is an old thread, but this will hopefully help someone out. The 4DMU-HL3S is also known as the 4MHL3S.

Jumper settings are available here:
https://stason.org/TULARC/pc/motherboards/E/E … 486-4MHL3S.html
http://www.win3x.org/uh19/public/motherboard/ … anual/31754.pdf

Mine came with (a poor photocopy of) the manual, which I've scanned and uploaded to archive.org here:
https://archive.org/details/efa-4mhl3s-4dmuhl … herboard-manual

Guessing we might have bought from the same ebay seller?
How do you like it? Main issue I've run into is the board uses an "always dirty" L2 cache strategy. So L2 cache is slower than it would otherwise be.

jakethompson1 wrote on 2021-07-22, 03:02:

Guessing we might have bought from the same ebay seller?
How do you like it? Main issue I've run into is the board uses an "always dirty" L2 cache strategy. So L2 cache is slower than it would otherwise be.

We probably did. I bought mine maybe 14 months ago. The slower cache doesn't bother me. With a DX2-66 installed it's already quite a bit faster than I require, but that's just me and this is a pure nostalgia build.

The build quality is above average for a generic 486 board. Compared to my others (all non-working I might add) the PCB is a bit thicker and it's noticeably heavier. However, the big selling point for me was the layout. Most boards I've seen put the CPU socket behind the ISA slots, so if you want to install a heatsink on the CPU and have a longer card or two, your slot options are limited.