NIC Type	Ethernet
Transfer Rate	10Mbps
Data Bus	8-bit ISA
Topology	Star
Wiring Type	Unshielded twisted pair AUI tranceiver via DB-15
Boot ROM	Available

CABLE TYPE
Type	JP3/A-H
Unshielded twisted pair	Pins 1, 2, & 3 closed
AUI transceiver via DB-15 port	Pins 2, 3, & 4 closed

BOOT ROM ADDRESS
Address		JP1/G	JP1/H	JP1/I	JP1/J
	C0000h	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
	C4000h	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
»	C8000h	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
	CC000h	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
	D0000h	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
	D4000h	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
	D8000h	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
	DC000h	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed
	E0000h	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
	E4000h	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
	E8000h	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
	EC000h	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

BASE I/O ADDRESS
Address	JP1/A	JP1/B	JP1/C	JP1/D	JP1/E	JP1/F
200h	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2
208h	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 2 & 3
210h	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 2 & 3	Pins 1 & 2
218h	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 2 & 3	Pins 2 & 3
220h	Pins 1 & 2	Pins 1 & 2	Pins 1 & 2	Pins 2 & 3	Pins 1 & 2	Pins 1 & 2
3D8h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2	Pins 2 & 3	Pins 2 & 3
3E0h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2	Pins 1 & 2
3E8h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2	Pins 2 & 3
3F0h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 1 & 2
3F8h	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3	Pins 2 & 3
Notes:Pins designated should be in the closed position. A total of 64 base I/O addresses are available. The jumpers are a binary representation of the decimal memory addresses. Jumper JP1/F is the Least Significant Bit and JP1/A is the Most Significant Bit. The jumpers have the following decimal values: JP1/F=8, JP1/E=16, JP1/D=32, JP1/C=64, JP1/B=128, JP1/A=256. Configure the jumpers and add 512 and the values of the jumpers closing pins 2 & 3 to obtain the correct memory base I/O address.

INTERRUPT SETTINGS
IRQ	JP2
2	Pins 1 & 2 closed
3	Pins 3 & 4 closed
4	Pins 5 & 6 closed
5	Pins 7 & 8 closed
6	Pins 9 & 10 closed
7	Pins 11 & 12 closed

IBM PC/XT COMPATIBILITY
Setting	JP4
NIC installed in main board slot 8	Closed
NIC installed in main board slot 1-7	Open
Note:This jumper only applies when the NIC is installed in an IBM PC/XT.

ONBOARD RAM/BOOT ROM CONFIGURATION
Function	JP1/K	JP1/L
8KB of RAM installed (NI5120-UTP-8)	Pins 2 & 3 closed	N/A
16KB of RAM installed (NI5120-UTP-16)	Pins 1 & 2 closed	Pins 1 & 2 closed
8KB of RAM and Boot ROM installed	Pins 1 & 2 closed	Pins 2 & 3 closed
Note: Socket U6 can either be an 8K RAM chip or a Boot ROM.

DIAGNOSTIC LEDS
LED	Color	Status	Condition
LED1	Red	Off	Data is not being received
LED1	Red	On	Data is being received
LED2	Yellow	Off	Data is not being transmitted
LED2	Yellow	On	Data is being transmitted
LED3	Green	Off	UTP link status OK
LED3	Green	On	UTP link broken
LED4	Red	Off	AUI port selected
LED4	Red	On	UTP port selected
Note: LED3 is only active when the UTP port is selected.