SUN3/80 Architecture

JUMPER	PINS	SETTINGS	DESCRIPTION
----------------------------------------------------
J1000	1-2	OUT		Watchdog reset(test)
J020	1-2	IN		68882 20MHz
	3-4	OUT		68882 40MHz
J043	2-3	IN		RS232C(-12V)
J044	1-2	IN		RS232C(+12V)
J043	1-2	IN		RS423(-5V)
J044	2-3	IN		RS423(+5)

Use 1MB SIMM or 4MB SIMM