[petrohi]

It’s possible to form monochrome VGA signal with an SPI, which is commonly available in microcontrollers.

I did little write-up on how to do it efficiently (DMA etc) on PIC32: https://hackaday.io/project/173682-color-ascii-terminal/log/...

[user-the-name]

On a fast enough STM32 you don't need any hardware tricks at all, you can just use DMA to feed values to an IO port, and get 8-bit VGA colour even at quite high resolution - 640x480 is entirely doable if you have enough memory.

See for instance https://github.com/SVatG/JupiterAndBeyond.