emul/pico-zxspectrum
emul/pico-zxspectrum
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pico-zxspectrum/docs/ZxSpectrumBreadboardHdmiNPinAudio.md

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ZxSpectrumBreadboardHdmiNPinAudio

This is a series of targets based around my original breadboard prototype:

Support for the following:

  • USB keyboard
  • PS/2 keyboard
  • USB joysticks
  • 50Hz/60Hz HDMI video
  • HDMI/PWM audio
  • Audio input (load from tape)
  • SPI SD card
  • Serial port debug
  • Ringo's low resolution mode

All of these targets share the same pinout but make different use of the 4 audio pins:

Circuit diagrams

image

Firmware

Audio Display mode Firmware Pico Firmware Pico 2
HDMI 720x576x50Hz ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2 ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2
HDMI 720x540x50Hz ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2 ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2
HDMI 640x480x60Hz ZxSpectrumBreadboardHdmiAudio.uf2 ZxSpectrumBreadboardHdmiAudio.uf2
1 pin PWM 640x480x60Hz ZxSpectrumBreadboardHdmi1PinAudio.uf2 ZxSpectrumBreadboardHdmi1PinAudio.uf2
2 pin PWM 640x480x60Hz ZxSpectrumBreadboardHdmi2PinAudio.uf2 ZxSpectrumBreadboardHdmi2PinAudio.uf2
4 pin PWM 640x480x60Hz ZxSpectrumBreadboardHdmi4PinAudio.uf2 ZxSpectrumBreadboardHdmi4PinAudio.uf2