ESP8266 Community Forum

Making everything fit into RAM is the largest problem in the project.

The MMU virtual RAM system uses 16KB of the memory.

Video uses 2KB of the memory at the moment.
DMA buffers for video rendering uses about 3KB of memory.

All of the above needs realtime RAM that cant be swapped out.

I managed to allocate 16KB of IRAM to use as a framebuffer for CGA graphics.

So Alley Cat will run in a near future.

impressive project!

The reason you do these emulator projects is that you dont have the time nor patience to build an operating system your self.

So you just rip somebody else of.

But its fun.

You can run the emulator with a SPI ILI9341 TFT.
But it needs a scaler to display 640 pixels across.

The composite video displays up to 1024 pixels across.
And 448 lines if you use interlaced video.

And its still readable even on a 3.5" display.