Hi there, The pdp 11/44 is working with a minimal configuration! Thanks to Bill Gunshannon and Milo Velmimirovic. The M7090 CIM is now doing RS 232 and gives me output (i get the console prompt >>>) the backplane only contains memory and the cpu-cards. The connector M9202 connects the two planes. I tried to boot the RL11 with one of my RL02's but i didn't work, i guess this is because i don't have a UNIBUS terminator. is it possible to make one myself ? i could make a dual-sided PCB. or is it possible that the backplane itself is terminated (like small qbus-systems have)? yes there are two 40 pin connectors. so it's a interface, i guess i don't use this... i guess i might use the Ethernet cards, the SMD-diskcontroller and the RL11. does anyone have the pinout of the M7792/M7793 Ethernet-controller ? i also still have no idea what those cards might be: if anyone has a spare unibus-controller for ciphertapes (pertec-interface), please contact me. -- regards, lothar.