TIARA COMPUTER SYSTEMS, INC. LanCard/A NIC Type ARCnet Transfer Rate 2.5Mbps Data Bus 8-bit ISA Topology Star Wiring Type RG-62A/U 93ohm coaxial Boot ROM Available [Image] NODE ADDRESS Node SW2/1 SW2/2 SW2/3 SW2/4 SW2/5 SW2/6 SW2/7 SW2/8 0 - - - - - - - - 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 251 Off Off Off Off Off On Off Off 252 Off Off Off Off Off Off On On 253 Off Off Off Off Off Off On Off 254 Off Off Off Off Off Off Off On 255 Off Off Off Off Off Off Off Off Note: Node address 0 is used for messaging between nodes and must not be used. A total of 255 node address settings are available. The switches are a binary representation of the decimal node addresses. Switch 1 is the Least Significant Bit and switch 8 is the Most Significant Bit. The switches have the following decimal values: switch 1=1, 2=2, 3=4, 4=8, 5=16, 6=32, 7=64, 8=128. Turn off the switches and add the values of the off switches to obtain the correct node address. (On=0, Off=1) DIAGNOSTIC LED(S) LED Status Condition L1 On Data is being transmitted/received L1 Blinking Card is reconfiguring L1 Off Card is resetting or is inoperative INTERRUPT REQUEST IRQ JP1 JP2 JP3 JP4 JP5 2 Open Open Open Open Closed 3 Open Open Open Closed Open 4 Open Open Closed Open Open 5 Open Closed Open Open Open 7 Closed Open Open Open Open OPTIONAL 8253 TIMER INTERRUPT REQUEST IRQ JP6 JP7 JP8 JP9 JP10 JP11 JP12 JP13 JP14 JP15 2 Open Open Open Open Closed Open Open Open Open Closed 3 Open Open Open Closed Open Open Open Open Closed Open 4 Open Open Closed Open Open Open Open Closed Open Open 5 Open Closed Open Open Open Open Closed Open Open Open 7 Closed Open Open Open Open Closed Open Open Open Open RESPONSE/RECONFIGURATION TIMEOUTS Response Time Reconfiguration Time JP16 JP17 » 74.7µs 840µs Open Open 283.4µs 1680µs Open Closed 561.8µs 1680µs Closed Open 1118.6µs 1680µs Closed Closed Note: All NICs on the network must have this option set the same. I/O BASE ADDRESS Address SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 » 2E0h Off On Off Off Off On 160h On Off On Off Off On 1E0h On Off Off Off Off On 260h Off On On Off Off On 360h Off Off On Off Off On 3E0h Off Off Off Off Off On Note: Some examples of possible settings are shown. The switches are a binary representation of the hexadecimal I/O addresses. Switch 6 is the Least Significant Bit and switch 1 is the Most Significant Bit. The switches have the following decimal values: switch 6=1h, 5=2h, 4=4h, 3=8h, 2=10h, 1=20h. Turn off the switches, add the values of the off switches, and multiply the total by 10h to obtain the correct I/O address. (On=0, Off=1) BOOT CONFIGURATION Setting SW2/9 SW2/10 Boot from network, ignore bootable On On floppy or hard drives Try to boot from floppy drive A, then On Off the network Try to boot from hard drive C, then Off Off the network Try to boot from floppy drive A, then Off On from hard drive C, then the network RIM BUFFER, BOOT ROM, AND EXPANSION RAM ADDRESS CONFIGURATION Address SW1/7 SW1/8 SW1/9 SW1/10 Cxxxxh On On Off Off Dxxxxh On On Off On Exxxxh On On On On Note: This table represents the first digit of three separate addresses, the rim buffer address, the boot ROM x variables are configured for the three different addresses in the next three tables. BOOT ROM ADDRESS CONFIGURATION Address JP18 JP19 JP20 » x8000h Open Closed Open Disabled Open Open Open x4000h Closed Open Open xC000h Open Open Closed EXPANSION SRAM CONFIGURATION Size Address JP21 W1 » Disabled Disabled Open N/A 2K x 8 (24pin) x4000h Closed Pins 2 & 3 closed 8K x 8 (28pin) x4000h Closed PIns 1 & 2 closed Note: The manufacturer suggests the use of Hitatchi 6116 2K x 8 SRAM or Hitatchi 6264 8K x 8 SRAM chips. Most network software packages do not currently support the extra expansion memory RAM BUFFER ADDRESS CONFIGURATION Address JP22 JP23 » x0000h Open Closed x4000h Closed Open Note: The RAM Buffer cannot be disabled.