STANDARD MICROSYSTEMS CORPORATION ARCNET PC220 NIC Type ARCnet Network Transfer Rate 2.5Mbps Data Bus 16-bit ISA Topology Linear Bus Wiring Type RG-62A/U 93ohm coaxial Boot ROM Available [Image] CONNECTIONS Function Label RG-62A/U 93ohm coaxial port J1 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not alter EXT Open » Boot ROM enabled ROM Closed Boot ROM disabled ROM Open Note: Jumper EXT is used to configure the network time-out settings, these two jumpers are normally left open, however for additional settings refer to the COM 9026 Data Sheet. NODE ADDRESS SELECTION Setting S1/1 S1/2 S1/3 S1/4 S1/5 S1/6 S1/7 S1/8 1 Off On On On On On On On 2 On Off On On On On On On 3 Off Off On On On On On On 4 On On Off On On On On On 5 Off On Off On On On On On 251 Off Off On Off Off Off Off Off 252 On On Off Off Off Off Off Off 253 Off On Off Off Off Off Off Off 254 On Off Off Off Off Off Off Off 255 Off Off Off Off Off Off Off Off Note: A total of 255 node address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/8 is the Most Significant Bit and switch SW1/1 is the Least Significant Bit. The switches have the following decimal values: SW1/8=128, SW1/7=64, SW1/6=32, SW1/5=16, SW1/4=8, SW1/3=4, SW1/2=2, SW1/1=1. Turn off the switches and add the values of the switches to obtain the correct node address. BASE I/O ADDRESS SELECTION Address S2/6 S2/5 S2/4 S2/3 S2/2 S2/1 0h On On On On On On 10h On On On On On Off 20h On On On On Off On 30h On On On On Off Off 40h On On On Off On On 3B0h Off Off Off On Off Off 3C0h Off Off Off Off On On 3D0h Off Off Off Off On Off 3E0h Off Off Off Off Off On 3F0h Off Off Off Off Off Off Note: A total of 64 Base I/O address settings are available. The switches are a binary representation of the decimal memory addresses. SW2/1 is the Most Significant Bit and switch SW2/6 is the Least Significant Bit. The switches have the following decimal values: SW2/1=512, SW2/2=256, SW2/3=128, SW2/4=64, SW2/5=32, SW2/6=16. Turn off the switches and add the values of the switches to obtain the correct node address. INTERRUPT SELECTION IRQ IRQ/A IRQ/B IRQ/C IRQ/D IRQ/E 2/9 Closed Open Open Open Open 3 Open Closed Open Open Open 4 Open Open Closed Open Open 5 Open Open Open Closed Open 7 Open Open Open Open Closed BASE MEMORY ADDRESS SELECTION Address SW3/1 SW3/2 SW3/3 SW3/4 SW3/5 SW3/6 SW3/7 SW3/8 000h On On On On On On On On 800h On On On On On On On Off 1000h On On On On On On Off On 1800h On On On On On On Off Off 4000h On On On On On Off On On 4800h On On On On On Off On Off 5000h On On On On On Off Off On 5800h On On On On On Off Off Off 8000h On On On On Off On On On 8800h On On On On Off On On Off 9000h On On On On Off On Off On 9800h On On On On Off On Off Off C000h On On On On Off Off On On C800h On On On On Off Off On Off D000h On On On On Off Off Off On D800h On On On On Off Off Off Off F0000h Off Off Off Off On On On On F0800h Off Off Off Off On On On Off F1000h Off Off Off Off On On Off On F1800h Off Off Off Off On On Off Off F4000h Off Off Off Off On Off On On F4800h Off Off Off Off On Off On Off F5000h Off Off Off Off On Off Off On F5800h Off Off Off Off On Off Off Off F8000h Off Off Off Off Off On On On F8800h Off Off Off Off Off On On Off F9000h Off Off Off Off Off On Off On F9800h Off Off Off Off Off On Off Off FC000h Off Off Off Off Off Off On On FC800h Off Off Off Off Off Off On Off FD000h Off Off Off Off Off Off Off On FD800h Off Off Off Off Off Off Off Off Note: The above table includes only a few of the many memory address settings available. The switches are a binary representation of the decimal memory addresses. SW3/1 is the Most Significant Bit and switch SW3/8 is the Least Significant Bit. The switches have the following decimal values: SW3/8=2048, SW3/7=4096, SW3/6=16384, SW3/5=32768, SW3/4=65536, SW3/3=131072, SW3/2=262144, SW3/1=524288. Turn off the switches and add the values of the switches to obtain the correct address. Notice that there is no switch representation for 8192 decimal. This means that 02000h, 03000h, 06000h, 07000h, 0A000h, 0B000h and 0E000h cannot be represented. Omissions in the above table reflect this.