WD1510 Overview
The WD1510 is an MOSILSI Memory Buffer which is organized as a 9-bit by 128 or 132 word stack. The chip has 2 bidirectional data ports and may be read from or written into either port. Thus, the chip can function as a LIFO from either port or it can function as a FIFO, with data flow from either port A to port B or vice versa.