Jumpers for 3Com 505 ethernet board installed in Apollo Otter series. In this chart, 'x' represents a jumper. '.' represents no jumper (only shown where necessary for clarity). This chart is not to scale and does not show the jumpers in their proper places on the board. BNC/DIX as needed (DIX is xcvr connecter, BNC is for thin ether) Mem Addr 13 x 14 x 15 x 16 x 17 x 18 x 19 x EN x IO Addr x 4 x 5 x 6 x 7 x 8 x 9 DMA INT INT DMA x xx 10 6 Test x On Off 2 . x . x On 1 Config ROM Sel Off x. x. On A16 A15