I am working on modifying a NES gamepad. I took me some time to take the dimensions of the PCB and the keepout area where the mounts are in the controller. I’m posting the dimensions here so maybe it saves you some time.
And remember, the dimensions are not guaranteed to be correct. If you find a mistake, drop me a note.
IC4021 is an 8-bit shift register with parallel inputs and serial output. It is clocked by the NES. Both resistors are 3.6k Ohm
Please note that the eight pull-up resistors printed direct to the pcb. They are located to the left and to the right of the solder pads of the shift register. Their value is roughly 50k Ohm.
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