The MTX on Youtube

[Martin A]

This UK Computer museum/retro youtube channel "The Cave" has released a new video that includes a quick test of a couple of donated MTXs
https://www.youtube.com/watch?v=vw8z5Hz9-iw

The 500 worked, the 512 back screened.

What's interesting is there's a quick view of a computer listing

cave listing.jpg (27.07 KiB) Viewed 29664 times

I don't think I've seen any regular MTX add-ons using ports 128 and 129. Anyone got any ideas ??

[stephen_usher]

It's doing some strange things. The peripheral seems to be 16 bit in that it's loading values from ports 128 and 129 into HL, then it's comparing, looping until a value is the same as L.

I wonder what the heck it's doing.

[gunrock]

We should ask Neil for a scan of the complete listing. It might not happen immediately, but worthwhile, no?