STAR HDLC Node Interface
 Signal List

A1 -  A23	Output address bus

D0 - D15	Input/Output data bus

CS2*, CS3*	Output chip selects (active low)

R/W*		Output data direction flag

DS*		Output data strobe (active low)

DTACK*		Input data acknowledge (active low) required response to  	
		every data strobe

N0 - N7		Input Node number (positive true) to be supplied by user

M0 - M3		Input Model number (positive true) to be supplied by user

Reset*		Input (active low) from user to reset 68302

TXA/ RXA	Output/Input data to/from HDLC line interface chip 		
		supplied by user.

TXB, RXB	Output/Input data to/from RS232 line connector 		
		(optional) for diagnostic purposes only.

MISC0...7	Individually programable I/O signals for general purpose use.

Vcc, Gnd	+5V and Ground supplied by user

All signals are TTL level . Consult 68302 data sheet for required timing.