Figured this might be useful to our Spanish speaking friends.
Dominando Ensamblador Z80 (DEZ80) ~ Mastering Z80 Assembler.
A University of Alicante course.
[media]https://www.youtube.com/watch?v=GYwPDZa ... ErhUaq5m7m[/media]
From what I can tell its a very slick course.
They use the Amstrad CPC but its still useful for Spectrum people.