https://vimeo.com/100712749
He is sending text from the computer to the PC Engine. How is that possible? I haven't seen any documentation on that, anywhere. Am I missing something?
Even more interesting, I'm wondering if the opposite could be true: Sending text from the PC Engine to the computer. That could prove really useful for debugging purposes

Add a monitor routine on the brk irq and maybe we could even step on asm code from the computer
