Network Card interface/drivers

i have a hp Duo core machine on which i have installed Mikrotik, But apperently i am not able to see the onboard network interface and i need to have several interfaces on the machine for Hotspot users and Leased Lines users. please assist on how to go about it as i only have 2 slots available

You can’t add drivers yourself, so if it doesn’t see the ports, you’re out of luck. I would recommend a couple of 4-port Ethernet cards from Mikrotik or the Intel PRO/1000 Quad.

You can also use some tested x86 systems. Usually cheaper in the long run, plus no worries about, will this hardware work etc.