Commodore 128 Assembly Programming #19: Worm part 4

It’s customary when making videos about 1980’s technology to wear a funny or ironic retro t-shirt. I have only one of those, so instead, enjoy one of my collection of local farmer hats.

In this one we add code to keep the tail pointer-to-pointer (TAILP) updated, to handle collisions with digits on the screen, and to keep the worm at the proper length, growing it when it “eats” digits. All the worm functionality is finished now, so next time we’ll work on the end-game score display, and a better keyboard-entry routine.