I’ve been very busy at work recently so have been unable to fiddle much with my broken Spectrum; it’s very much a lunchtime activity but unfortunately my lunchtimes have been non-existent recently. However, I have been fiddling around writing some Z80 for my own pleasure and have posted the source online today for your amusement. I’m perfectly happy for you to use this code or this with or without modification; a little acknowledgement would be nice, …
Recently I’ve become fascinated with online emulation of various old bits of kit. It appears that modern PC’s are so much more powerful than their ancestors (and by a good factor) that emulator writers no longer need to resort to assembly language or C++ to emulate 8 bit computer hardware. You can emulate a Spectrum in Java, or indeed in Javascript! If you want to investigate further, I would invite you to check out The …
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 …