A deep-dive reverse engineering project on a cheap NES-on-a-chip device built into a phone case. The process involves disassembling the hardware, identifying a mystery resin blob chip as a VT369 NES-on-a-chip, dumping the external ROM, and using code injection to control the backlight as a signaling mechanism to extract the chip's internal 4K ROM by flashing it on and off. The project highlights the versatility of these NES-on-a-chip ICs beyond gaming.
