There we go, Bad Apple on the 6502-based homebrew computer, rendered without any graphics related hardware over 19.200 baud RS232 UART!
It's slow as shit but I already have some further optimizations in mind.
Oh, and the video frames, together with the code to decode and print the characters, only takes ~9.9K of memory. It easily fits into the 32K of addressable SRAM, without conflicting with any zeropage stuff or the stack.