Computer Dynamics 386 SBC-SXE

Hi Everybody

I am writing to request some information on the video settings for a Computer Dynamics 386 SBC-SXE motherboard.

I have just replaced a legacy system which interfaces to a EL7768MS display board. I can see the display via the standard VGA output to a monitor, but I can't get a display on the EL7768MS display board. I understand that this old series of 386 SBC can be set for simultaneous video display mode but without the manual or information on the 386 SBC-SXE motherboard, I don't know how to set it.

Will greatly appreciate if anyone who has the manual can assist to advise which jumpers to set to achieve the desired result.

Thank you so much!