I’ve been asked a couple of times lately on the best programming language for a young person to start learning to code. To be honest, up until last week I would have said Microsoft Small Basic, but then I got chatting to a guy called Paul Clarke on Twitter (@YOUSRC) who runs YOUSRC; an online resource for learning to program. The site requires Java and an Internet connection. All development is done online via the …
I’ve just started adding lists of Z80 opcodes onto the site. I’m hoping to expand this eventually to include a brief explanation along with the T states and Machine Cycles to execute each command. It also includes what we used to call the “undocumented instruction set”; ironically these are now probably as documented as the official Z80 instructions. Here are the lists in all their glory! Enjoy.
Well, I’ve finally dusted off my Z80 programming skills and after a little refresher course with the University of Internet I’ve developed this sprite demo. Most of the concepts here are not new; they are how I wrote games back in the day. The sprite routine is basic; it does not mask, but it is using pre-shifted sprites and running within a vertical interrupt routine. The red border, by the way, indicates how much raster …
