Re: ZX80 / ZX81 Emulator for the Raspberry Pi Pico
Posted: Tue Mar 19, 2024 7:19 pm
Either of the Olimex uf2 files will work.
picozx81_olimexpc.uf2 will provide sound over the 3.5mm audio connection
picozx81_olimexpc_hdmi_sound.uf2 will provide sound over the hdmi cable
There was an issue with the original Olimex firmware, where stereo audio over the 3.5mm audio connection was not possible with a display, as the PWM clock for the left audio channel was shared by the pin used for the DVI clock. This was fixed in later releases of picozx81 by using a PIO state machine to generate the DVI clock.
picozx81_olimexpc.uf2 will provide sound over the 3.5mm audio connection
picozx81_olimexpc_hdmi_sound.uf2 will provide sound over the hdmi cable
There was an issue with the original Olimex firmware, where stereo audio over the 3.5mm audio connection was not possible with a display, as the PWM clock for the left audio channel was shared by the pin used for the DVI clock. This was fixed in later releases of picozx81 by using a PIO state machine to generate the DVI clock.