Saving data to non-volatile on chip memory.

Greetings, I am a newbie and started to learn 89s8253 micro processor. So far i have written c code for Modbus Slave. I am storing the device id in idata variable but the value is lost on power off...
Saving data to non-volatile on chip memory.

Greetings, I am a newbie and started to learn 89s8253 micro processor. So far i have written c code for Modbus Slave. I am storing the device id in idata variable but the value is lost on power off...
non volatile memory

I am wondering how to save a variable's value in case of power reset. I am creating a program to write to a display and I want to keep track of the selection that the user made before the system power...
non volatile memory

I am wondering how to save a variable's value in case of power reset. I am creating a program to write to a display and I want to keep track of the selection that the user made before the system power...
non volatile memory simulation

Does anyone have an idea how to simulate non volatile memory in uVision2? (Sometimes having a prototype board in your hands to use with your emulator takes a bit longer than you expect, and you have...