Try a different COM cable. There are two versions of how it can be wired.

update, after some searching in the web, i have a funworl logo on my boot screen.. this means i have a different bios ? but is marked 1,72f

derSammler - > what do you mean ? i've tested like 3 cables.. all look exaccly the same...

nuno14272 wrote on 2020-04-06, 10:51:

derSammler - > what do you mean ? i've tested like 3 cables.. all look exaccly the same...

The wiring can be either pin 1>1, pin 2>2, etc. (left to right-order), or pin 1>1, pin 2>6, pin 3>2, etc. (zigzag-order)

You can't see the wiring from the outside and only the cable with the wiring used by the mainboard will work.

on the motherboard... is:

678910
12345

not

246810
13579

hmmm

so.. it's diferent from other boards ?

It depends which motherboard. There are two standards and you can't visually make the difference between the two.

so.. it's diferent from other boards ?

It's about the pins inside the COM connector. Printing on the mainboard is always the same. As said, you can't see the wiring from the outside, nor is there any way to tell which of the two you need if you don't have the ones that came with the board. So you need to try both variants if one is not working.

yes this is exactly what derSammler says, new COM cables will not work with older systems, the change was made in p1 era AFAIK

update 1) the bord as a PS/2 header... if i use it... the keyboard stops responding.. doesn't wor any more.. strange..

update2) if i use a ISA COM card (just adds two more com ports, the mouse doesn't work either...

update 3) if i install a ISA IDE card.. (for old computer wihthout ide onbord), the mouse works.... for about, 3 or 4 seconds.. them the mouse freezes... either in dos or windows 3.11..

i'm getting out of ideas

I've read that depending of the BIOS revision, the PS/2 port doesn't work well.