One ubiquitous demo effect that can be seen on a wide variety of demos and intros is the twister or the twister bar. There are numerous examples in productions for the Amiga, Atari ST and 2600 that I know of (and even at least one on the Sega Master System). And probably a lot more that I don’t know. However I have never seen this effect in any of the old PC demos, except maybe in Future Crew’s PANIC, where something very similar was used for the vertical scrolling greetings. But it was not quite the same still. So today we will code a variant of the twister using Turbo C for MS DOS!
I got an old Galep-III universal EPROM programmer from a friend. He couldn’t get the device to work under Windows 10, since it is quite old and uses the parallel port. This device is perfect for my 486! And since I just finished assembling an XT CF Lite card, I needed something to write its EEPROM with.
The device looks a bit aged, due to dirt and severe yellowing, so we will clean it and retrobrite it, to make it look like new. This is only my second attempt (after an experiment with my serial mouse), so let’s hope for the best!