2 X 2716 = 2732 - 4096 bytes in two EPROMs

4096 bytes in two EPROMs ICs with the exception, of course, of CS. The enable signals for this pin are taken from the outputs of the 74LS00. One of the EPROMs (refer- red to here as 2716 (1)) is addressed for the first 2 K block of the "2732", and All is then logic low. The sec- ond 2716 is enabled when the sec- ond 2 K block is being accessed (All is then logic high). Remember to apply the appropriate logic levels for the OE and Vpp pins: pin 21 must be connected to +5 V and pin 20 to earth. The method of construction and fit- ting of this circuit should be carefully considered to cause the minimum of disturbance on the printed circuit board. Almost everybody who builds micro- computer projects will notice sooner or later that he has been stockpiling certain often-used components. A case in point is the 2716 EPROM, which is so commonly used that it is wise always to have a couple on hand. In spite of the fact that the 2716 is so common, EPROMs with double this capacity (2732 = 40...