SCB-1040, SCB-1050 IO card Settings and Configuration

Card Type	Serial controller
Chipset/Controller	NEC
I/O Options	Serial port
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location
Serial port - DB-25	CN1

INTERRUPT SELECT - J1
Setting		Jumper A	Jumper B	Jumper C	Jumper D	Jumper E	Jumper F
»	IRQ4	open	open	closed	open	open	open
	IRQ2	closed	open	open	open	open	open
	IRQ3	open	closed	open	open	open	open
	IRQ5	open	open	open	closed	open	open
	IRQ6	open	open	open	open	closed	open
	IRQ7	open	open	open	open	open	closed

DMA SELECT - J2
DMA		A	B	C	D	E	F	G	H
»	CH 1 for transmit	closed	open	closed	open	open	open	open	open
»	CH 3 for receive	open	open	open	open	open	closed	open	closed
	CH3 for transmit	open	closed	open	open	open	closed	open	closed
	CH1 for receive	closed	open	open	open	open	open	closed	open
	CH1 for transmit and receive	closed	open	open	open	closed	open	open	open
	CH3 for transmit and receive	open	open	open	closed	open	open	open	closed

INTERRUPT MODE
Setting		J3
»	Use dedicated IRQ	pins 1 & 4 closed
	Share IRQ with compatible Quatech card	pins 2 & 5, 3 & 6 closed

RECEIVE CLOCK SOURCE
Source		J4
»	Internal	pins 2 & 3 closed
	External	pins 1 & 2 closed

TRANSMIT CLOCK SOURCE
Source		J5
»	Internal	pins 2 & 3 closed
	External	pins 1 & 2 closed

-SYNC/IPS SELECT
Source		J6
»	Intenal synchronization mode sync notification signal enabled	pins 2 & 3 closed
	External synchronization mode - sync notification signal enabled	pins 1 & 2 closed
	Asynchronous mode - general purpose signal enabled	pins 1 & 2 closed

INTERRUPT SOURCE - J7
Setting		Jumper A	Jumper B
»	From communications controller	closed	open
	From DMA terminal count	open	closed

RTS/CTS MODE
Setting		J8
»	RTS/CTS connected to CN1	pins 1 & 4, 2 & 5 closed
	RTS/CTS loopback enabled	pins 1 & 2, 4 & 5 closed

HALF/FULL-DUPLEX SELECT
Setting		J8
»	Half-duplex	pins 3 & 6 closed
	Full duplex	pins 3 & 6 open

RECEIVE CLOCK BUFFER SELECTION
External Clock		J9
»	EIA-422/EIA-485	pins 1 & 5, 2 & 3, 7 & 8 closed
	TTL	pins 1 & 2, 4 & 8 closed

TRANSMIT CLOCK BUFFER SELECTION
External Clock		J10
»	EIA-422/EIA-485	pins 1 & 5, 2 & 3, 7 & 8 closed
	TTL	pins 1 & 2, 4 & 8 closed

SYNCHRONOUS BLOCK TRANSFER COMPATIBILITY
Setting		J11
»	Block Transfer software compatible	pins 1 & 2 closed
	Quatech REV A compatible	pins 2 & 3 closed
Note:The location of jumper J11 is not specified in manufacturer’s documentation.

I/O ADDRESS CONFIGURATION
Base Address		SW1
»	210h	2, 3, 4, 5 & 7 on
	0F0h	1, 2 & 7 on
	Note (1): The address range for the SCB-1040/1050 is from 0 to 3F8h. The switches are a binary representation of the addresses. When a switch is off, the corresponding bit is set to 1 and has the following decimal value: SW1/1=2, SW1/2=1, SW1/3=8, SW1/4=4, SW1/5=2, SW1/6=1, SW1/7=8. SW1/8 is not used and the factory setting should not be altered. The SCB-1040/1050 requires 8 consecutive address locations.