2716 versus 2708 - how to double your ROM memory capacity

how to double your ROM memory capacity The 2708 EPROM has become vir- tually obsolete, and with good reason. It needs three supply voltages for its capacity of a 2716 2708 1 .5V Pin 20, incorrectly called CS (chip select) on the 2708 while its func- tion is actually OE (output enable), retains the same function. — Pin 19 (+12 V on the 2708) becomes address input A10 for the 2716. Depending on the logic level on this pin either the first or second 1 K block is selected. A switch could be used for this so if the EPROM contains a monitor, for example, two different versions of the same software could be stored in the same IC. — Pin 18, which is connected to ground for the 2708, need not be changed for the 2716 ICE, chip enable); note in passing that the 2716 will then never achieve the minimum power dissipation of 132 mW (stand by current). There are several different ways of carrying out these modifications. An intermediary IC socket could be used with the pins that are to be ch...