It's not impossible at all, but the current version isn't really suitable. It's driven by SPI from the raspberry pi, and the IR and buttons go via a serial port. This isn't the same way the empeg does it.

One the empeg the display is passive and driven by the lcd output port, with a certain amount of logic on the display board to twiddle the LCD signals into the format of the VFD. To make it drive an OLED like this, we would probably have to add another processor, which would read the lcd signals and generate the correct data to drive an intelligent OLED panel.

Something like an STM32F4 series microcontroller would do it. I have been considering making a board like this, but whether there is sufficient demand to make it worthwhile is debatable.

Pca