Starting a ZX Spectrum shooting gallery in earnest

Michael Martin is working through a port of a shooting gallery Rosetta-stone program to the ZX Spectrum.

It’s been a long road. We started out knowing how to control text and bitmap output and a decent handle on I/O. From there we designed a reasonably efficient blitting system that operated on 16×16 “sprites” that we carefully prepared for efficient blitting.

Even this wasn’t enough to keep our graphics updates smooth, though, so we then had to carefully arrange our bitmap operations to tear instead of flicker. I’ve been putting this project together bit by bit.

See how Michael has built out other parts in the post here.

from Adafruit Industries – Makers, hackers, artists, designers and engineers! https://ift.tt/PDLGMWE
via IFTTT