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32 lines
1.9 KiB
Markdown
32 lines
1.9 KiB
Markdown
### ZxSpectrumBreadboardHdmiNPinAudio
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This is a series of targets based around my original breadboard prototype:
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<img src="pico_zxspectrum_prototype_1.jpg" height="200"/>
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Support for the following:
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* USB keyboard
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* PS/2 keyboard
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* USB joysticks
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* 50Hz/60Hz HDMI video
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* HDMI/PWM audio
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* Audio input (load from tape)
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* SPI SD card
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* Serial port debug
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* Ringo's low resolution mode
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All of these targets share the same pinout but make different use of the 4 audio pins:
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#### Circuit diagrams
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#### Firmware
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| Audio | Display mode | Firmware Pico | Firmware Pico 2 |
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| - | - | - | - |
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| HDMI | 720x576x50Hz | [ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2) | [ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmiAudio720x576x50Hz.uf2) |
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| HDMI | 720x540x50Hz | [ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2) | [ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmiAudio720x540x50Hz.uf2) |
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| HDMI | 640x480x60Hz | [ZxSpectrumBreadboardHdmiAudio.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmiAudio.uf2) | [ZxSpectrumBreadboardHdmiAudio.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmiAudio.uf2) |
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| 1 pin PWM | 640x480x60Hz | [ZxSpectrumBreadboardHdmi1PinAudio.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmi1PinAudio.uf2) | [ZxSpectrumBreadboardHdmi1PinAudio.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmi1PinAudio.uf2) |
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| 2 pin PWM | 640x480x60Hz | [ZxSpectrumBreadboardHdmi2PinAudio.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmi2PinAudio.uf2) | [ZxSpectrumBreadboardHdmi2PinAudio.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmi2PinAudio.uf2) |
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| 4 pin PWM | 640x480x60Hz | [ZxSpectrumBreadboardHdmi4PinAudio.uf2](/uf2-rp2040/ZxSpectrumBreadboardHdmi4PinAudio.uf2) | [ZxSpectrumBreadboardHdmi4PinAudio.uf2](/uf2-rp2350-arm-s/ZxSpectrumBreadboardHdmi4PinAudio.uf2) |
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