How Does The Gameboy System Blank Memory Work?

Gameboy makes use of blank memory .i.e. Flash memory. It is a non volatile memory which data is stored temporarily in the memory. This memory can be deleted. It can be reprogrammed to store the data back again. This kind of memory is in BIOS of a personal computer, digital set-top boxes, video games, calculators, digital cellular phones  

Flash memory is often used because of its ability to store information at a faster rate. This memory has no mechanical parts. Hence, it is also called solid state storage device. Flash memory is a type of electrically erasable programmable read-only memory. When you look at a flash memory, you will be to see a network of rows and columns with a cell consisting two transistors at each junction. Floating gate and control gate are the names of the transistors. Both the transistors are set apart from each other by means of a thin oxide layer.  When power passes through these, the memory starts functioning.

Click the following link to understand the working of a flash memory:
www.howstuffworks.com/flash-memory.htm.