Twirling bar animation 8080 demo

[pamoroso]

This program is a modified version of my Twirl 8080 demo.

Unlike the original version, which is intended to be ported to CP/M, the one I'm submitting here is designed to run only on emuStudio. This makes the code simpler as the ADM-3A escape codes the program uses are single bytes, only the putchar I/O subroutine is required, and the calls don't need to preserve any registers.

I donate this code to the emuStudio project under the GPL 3.0 license.

[vbmacher]

Thank you very much for this contribution Paolo! It's really nice and simple program. It's good to see that ADM-3A escape sequences work haha :)

[vbmacher]

@pamoroso Oh I merged it, but just after that I noticed push h instruction in your example. I dont see any pop h, so Im assuming it's some leftover from previous version of the program?

[pamoroso]

You're right, that push h instruction is a leftover from the previous version of the program and can be removed. Thanks!