TIARA COMPUTER SYSTEMS, INC. LANCARD/A*PC TP NIC Type ARCnet Network Transfer Rate 2.5Mbps Data Bus 8-bit ISA Topology Ring/Daisy Chain/Star Wiring Type Unshielded twisted pair Boot ROM Available [Image] CONNECTIONS Function Label Function Label Unshielded twisted pair CN1 Unshielded twisted pair CN2 port port USER CONFIGURABLE SETTINGS Function Label Position » Enhanced mode diagnostic disabled JP7 Pins 1 & 2 closed Enhanced mode diagnostic enabled JP7 Pins 2 & 3 closed » Terminator Resistor disabled JP8 Pins 2 & 3 closed Terminator Resistor enabled JP8 Pins 1 & 2 closed BASE I/O ADDRESS SELECTION Address SW1/1 SW1/2 SW1/3 260h-26Fh Off Off Off 290h-29Fh Off Off On 2B0h-2BFh Off On On » 2E0h-2EFh Off On Off 300h-30Fh On Off Off 350h-35Fh On Off On 380h-38Fh On On Off 3E0h-3EFh On On On INTERRUPT SELECTION IRQ JP1 JP2 JP3 JP4 JP5 JP6 » 2 Closed Open Open Open Open Open 3 Open Closed Open Open Open Open 4 Open Open Closed Open Open Open 5 Open Open Open Closed Open Open 6 Open Open Open Open Closed Open 7 Open Open Open Open Open Closed NODE ADDRESS Node SW2/1 SW2/2 SW2/3 SW2/4 SW2/5 SW2/6 SW2/7 SW2/8 1 Off Off Off Off Off Off Off On 2 Off Off Off Off Off Off On Off 3 Off Off Off Off Off Off On On 4 Off Off Off Off Off On Off Off 5 Off Off Off Off Off On Off On 251 On On On On On Off On On 252 On On On On On On Off Off 253 On On On On On On Off On 254 On On On On On On On Off 255 On On On On On On On On Note: A total of 255 node address settings are available. The switches are a binary representation of the decimal node addresses. Switch 8 is the Least Significant Bit and switch 1 is the Most Significant Bit. The switches have the following decimal values: switch 8=1, 7=2, 6=4, 5=8, 4=16, 3=32, 2=64, 1=128. Turn on the switches and add the values of the on switches to obtain the correct node address. (On=1, Off=0) ROM ADDRESS SELECTION Address SW1/4 SW1/5 SW1/6 C0000h-C3FFFh Off Off Off C4000h-C7FFFh Off Off On CC000h-CFFFFh Off On On » D0000h-D3FFFh On Off Off D4000h-D7FFFh On Off On D8000h-DBFFFh On On Off DC000h-DFFFFh On On On E0000h-E3FFFh Off On Off CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS Maximum Response Reconfiguration SW1/7 SW1/8 Length Time Time » 4.8 miles 74.4µs 840ms On On 21.0 283.4µs 1680ms On Off miles 42.5 561.8µs 1680ms Off On miles 85.6 1118.6µs 1680ms Off Off miles Note: Maximum length is the distance between the two farthest cards on the network. All cards on a segment must have this option set the same. DIAGNOSTIC LED(S) LED Color Status Condition LED1 Red On Data is being received LED1 Red Blinking Reconfiguring network LED1 Red Off Data is not being received LED2 Green On Data is being transmitted LED2 Green Blinking Reconfiguring network LED2 Green Off Data is not being transmitted Note: If blinking persists it indicates a network problem. TECHNICAL NOTE Note: The last node of the chain needs to be terminated.