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schematic 80386

Abstract: e174 ALS6311 80386 microprocessor PAL20R4D AN619 DP8421A C1995 DP8420A DP8422A
Text: National Semiconductor Application Note 619 Lawson H C Chang February 1989 INTRODUCTION This application note describes how to interface the 80386 microprocessor to the DP8422A DRAM controller also applicable to DP8420A 21A with burst mode access The 80386 is running at 16 MHz 20 MHz or 25 MHz speed It is