Hacker News Reader

HNHacker News

Top New Best Ask Show Jobs

Comment by mzs | Hacker News Reader

Full thread

mzs·

What a click-bait vid, here's a PDF: http://www.z80.info/zip/z80-documented.pdf

View on HN

> What a click-bait vid, here's a PDF: http://www.z80.info/zip/z80-documented.pdf

That PDF isn't what the video is about though.

It's not really that much click-bait either. "Method to implement Z80 protected mode discovered after 40 years" would be more correct, but that's too convoluted for YouTube's algorithm.

That PDF is about undocumented Z80 features discovered over the years. That video is not about "The Z80's protected mode discovered after 40 years…" That video instead should have been titled "My janky hack to isolate Z80 IO space" hence its click-bait title. If it had been titled appropriately I would not have wasted time seeking about looking for the recent discovery. Since there have been pretty astounding discoveries over the years I was pretty upset by the video hoping for a new one. I hope he doesn't pull a stunt like this again.

So I'm scrolling through this and wonder just how useful this info would have been back in the day when we were working with Z80s and came across this:

This section might also relevant even if you don’t do anything with hardware; it might give some insight into how the Z80 operates. Besides, it took me hours to draw this.

I feel so validated because I myself have included content in user manuals for the pretty much the same reason.

He mentions this in the vid, a few minutes in.

> He mentions this in the vid, a few minutes in.

transcript >>> video

Oh ty, I knew why I didn't click on the video and just skipped to the comments.

Thanks!

Reply on news.ycombinator.com