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53 lines
1.6 KiB
Markdown
53 lines
1.6 KiB
Markdown
### ZxSpectrumPicomputerMax
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These is the target for Bobricius' Retro PICOmputerMAX.
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<img src="picomputermax.png" height="250"/>
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It supports the following:
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* USB keyboard
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* USB joysticks
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* Matrix keyboard (6x6)
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* LCD video (ST7789)
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* PWM sound (1 pin)
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* SPI SD card
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#### Circuit diagrams
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#### Firmware
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[ZxSpectrumPicomputerMax.uf2](/uf2-rp2040/ZxSpectrumPicomputerMax.uf2)
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#### Keyboard mappings
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Trying to squeeze in all the key mappings is tricky but here is an attempt.
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These are the nomal key mappings:<br/>
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<img src="retro_vga_keyboard_normal.svg" width="500"/><br/>
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These are the mappings with the ALt key down.:<br/>
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<img src="retro_vga_keyboard_alt_down.svg" width="500"/><br/>
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Shifted and numeric mappings are turned on and off using the arrow keys (up, down, left, right).
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QS1, QS2, ... save the emulator state to the appropriate Quick Save slot.
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If there is a save in QS1 it will load after the emulator is powered-on or reset.
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The SN keys load snapshots as if they are in a loop.
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SN loads the current snapshot, SN- load the previous snapshot and SN+ loads the next snapshot.
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These are the mappings with the numeric shift on:<br/>
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<img src="retro_vga_keyboard_num.svg" width="500"/><br/>
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Alt+V sets the arrow keys to behave like a Kempston joystick,
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Alt+C sets the arrow keys to operate the Spectrum cursor keys.
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#### Kiosk mode
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Kiosk mode disables the menu system and quick-save buttons.
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Kiosk mode is enabled by placing the following file on the SD-card:
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```bash
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zxspectrum/kiosk.txt
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```
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#### References
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[Hackaday](https://hackaday.io/project/183398-retrovga-raspbery-pico-multi-retro-computer) |