SUPERPROTO Manual Superpage Select

You can easily use 4 switches or jumpers to manually select which EEPROM superpage page is selected. This can be useful if you have several applications on breadboards or changable circuit boards that you would like switch between.

To implement just pull up the P11 through P14 inputs to the EEPROM with 10K resistors to +5 volts. You can switch each input between low and high with four switches. Make sure that the P11 through P14 solder blob jumpers are disconected before you do this.

Here is the schematic

Here is an example implementation. Currently I have my 1101 SRAM Tester code in superpage 0 and the Diagnostic Program in superpage 1. When I get around to it, the 2102 SRAM tester that I will eventually build, will also get it's own superpage.

Note that some experimenters may decide to avoid this particular implementation, as system +5 volts is exposed on the leads from the resistors at the top of the board. Those exposed leads should really be covered in shrink wrap tubing.