US$4 Raspberry Pi Pico Emulating US$99.99 Nintendo NES (1987)
See Raspberry Pi Pico.
See the video description on YouTube:
Homemade NES emulator running on a Raspberry Pi Pico, clocked at 96MHz. The Pico is not only simulating the NES CPU/APU/PPU, but also directly bit-banging the VGA scanline color/sync signals and PWM audio output. All on a $4 chip!
The CPU/PPU interaction is a bit sketchy in places - there's some visible corruption in a few games, but I'm not aiming for pixel-perfect timing. It actually runs fine at a 48MHz system clock speed!
This really is an awesome device. Huge congrats to the folks at Raspberry Pi.
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