Fastbeta ZX Spectrum firmware
Fastbeta is a firmware for Raspberry Pi 2040/2350 chips that emulates the functionality of the vintage home computers ZX Spectrum series
You will get an almost real ZX Spectrum 48/128/+3e with VGA, HDMI or Composite video output, 2xAY8910, SAA1099 sound emulation, BetaDisk Interface and DivIDE support
The assembly scheme is open and available for modifications
To flash the firmware press and hold BOOT SEL button on your RP2040/RP2350, connect USB cable to the computer, copy the firmware UF2 file to the external flash RP2 drive
You will get an almost real ZX Spectrum 48/128/+3e with VGA, HDMI or Composite video output, 2xAY8910, SAA1099 sound emulation, BetaDisk Interface and DivIDE support
The assembly scheme is open and available for modifications
To flash the firmware press and hold BOOT SEL button on your RP2040/RP2350, connect USB cable to the computer, copy the firmware UF2 file to the external flash RP2 drive
Hardware schematic for Fastbeta ZX Spectrum
HDMI video output
HDMI video output
GP14...GP22 ports are located on the back of the module
GP16 port (connected to RGB LED) can be soldered on top of the module
Near the RGB LED or by removing it.
GP16 port (connected to RGB LED) can be soldered on top of the module
Near the RGB LED or by removing it.
Hardware schematic for Fastbeta ZX Spectrum
You can combine both VGA and HDMI video outputs or solder only one of them
You can combine both VGA and HDMI video outputs or solder only one of them
Composite Video output on GP13
Make sure both TV and computer hardware GND are connected
Make sure both TV and computer hardware GND are connected
Optional PSRAM connection
RP2040 only, not applicable to RP2350:
PSRAM_PIN_CS=GP18
PSRAM_PIN_SCK=GP19
PSRAM_PIN_MOSI=GP20
PSRAM_PIN_MISO=GP21
Supported PSRAM ICs:
Espressif ESP-PSRAM64H
Apmemory APS6404L
Lyontek LY68L6400
IPUS IPS6404
Audio input schematics
Will work with any fastbeta hardware and firmware
