CentreCOM RE1000 (Allied Telesis) C bus NIC (LAN board) with 10BASE-T connector.Rotary on the back of the board There is one switch. ・ Rotary switch: I / O base address setting 0 = 00D0h (factory setting) 8 = 00D8h 1 = 01 D0h 9 = 01 D8 h 2 = 00D2h A = 00DAh 3 = 01 D 2 h B = 01 DA h 4 = 00D4h C = 00DCh 5 = 01 D4 h D = 01 DCh 6 = 00D6h E = 00DEh 7 = 01 D6 h F = 01 DE h After setting the I / O base address, the hardware diagnostic program (ETHDIAG.EXE) Specify the set I / O base address and IRQ as arguments, and check the operation I do.