this will be the basic rundown on how this side of the chip works.
once the cartridge is inserted into the slot (the big black thing in the center) its rom (read only memory) chip is read and the
data is sent to the CPU, aka the computing chip. The CPU sends its data to the audio chip, directly right of it, and the ribbon cable on the
very top of the chip. The ribbon cable brings the data from the CPU to the screen of the device. The CPU also gathers information from the buttons
on the other side of the device. on the bottom half of the chip, you can see the speaker, as well as the springs that hold the batterys.
how it works - the front
The labeled pads on the bottom white protion of the board are the controls. When the bottom half of
the buttons makes contact with these pads, it sends the inputs to the CPU. The wiring and iputs at the top
is what connects all the bits and chips from the other side together. the red light
at the upper most left of the bored is the power indicator. it shows when the device is on.
how it works - connection port
this port is used to connect two gameboys together for cross play. The port has three connections. the bottom
port is the clock port. it matches up the internal clocks of both devices. the middle port is the input port and
connects to the other devices output port. the top port is the output port
it connects to the other devices input port.
how it works - the buttons
On the left is the gameboys respective buttons and button membranes. when you press down the plastic buttons, it pushes down the membranes under it.
the under side of the membranes make contact with the board and send the inputs to the cpu.
the button that looks like a big plus is called the D pad. its used for directinal movement. The A and B buttons use varies from game to game
but its common for A to be jump or interact.
how it works - ribbon cable
the ribbon cable is the cable that gathers visual data from the CPU. its connected to the top port on the back of the board, and the screen.
theres not all to much else to say about the ribbon cable, except that its notoriusly fragile. if you disconnect it wrong you need to completly replace it.
how it works - screw
Most nintendo devices, even up to this day, use this special screw. instead of four indents, there is three.
this is to diswade anyone trying to get into there devices and repair things themselves. tech companys are trying to
move away practices like this now under the consumers right to repair.