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In 1989, NEC’s engineers faced a problem. The PC Engine, a compact 8-bit powerhouse with a 16-bit graphics chip, was selling in millions across Japan. But repairing them was a nightmare. The console had no standardized debug interface, and crashes often produced “rainbow screens” with no error code. A field technician’s only hope was a multimeter and guesswork.
It is important to note the regional differences regarding this hardware: syscard3 pce