Obscure turbo LED display layout.

[s3th_one]

Hey there.

a couple of years ago I put together a 486 PC with an AMD DX4-100. Until now I used a 2 digit display set to 33 and 99 but it always bugged me.
Eventually I got this 3 digits display, but I can't figure out the headers layout yet.

After some probing with a multimeter I've found what should be the 5V and GND pins and it, indeed, lights up, but my finds end there.
The other two pairs of pins below the power ones don't seem to be neither for a switch or an LED.
Segments and dots layout is nothing like I've seen before.

The display was referred as K-241-12, but searching this code I couldn't find anything related to the display.

Have any of you seen this model of display before or any documentation about it?

Any hint or help would be greatly appreciated.

Thanks!

 

[btb]

I think some of the header pins should also be going to the actual turbo switch, as well as to the motherboard’s turbo input.

My guess is that every other row of the selection pins is connected to ground or 5v depending on the type of display used. Half of those are active in turbo, half in non-turbo.

Each pin on the alternate rows then goes to an individual segment (a,b,c,d,e,f,g) of each digit. If my guess is correct, none of them should be horizontal as in your photo, and you’ll probably end up needing more jumpers. I’d use a multimeter to see which pins go to each segment.