iFixit

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"Shall I compare thee to an Xbox 360? Thou art more lovely and more temperate...But thy internal structure shall not fade...Nor shall time brag thou wand'rest in its shade...So long as gamers can breathe or eyes can see, So long lives this, and this gives life to thee."

After the motherboard assembly is out, the reset and power button covers can easily be removed.

Unclipping a spring is all that's needed to remove the eject mechanism from the outer case.

• Ejecting a cartridge is accomplished by pushing two inclined planes underneath the cartridge until it pops up off the connector attached to the board.

Breaking Gently releasing the retaining clips holding the cartridge together reveals a 60 pin printed circuit board.

Front and back sides of the Famicom cartridges:

• This PCB from a Tennis cartridge has two ROM packages -- totaling 24 KB -- soldered to one side.
• For comparison, a single layer Blu-ray disc has a 25,000,000 KB capacity.