VCCC 2025 Snowflake

Author: izne
Category: Wild
System:   IBM XT / DOS
Language: Sphinx C-- 0.238

Instructions:
Run on any DOS hardware (8088 included, but 80286 up recommended) or DOSbox/86box, etc. emulators.
Execute VC25-n.COM from the command line, where [n] is the variation number of the main program.

Description:
A software roto-bounce renderer in VGA mode 13h via BIOS INT 10h.
19x19 bitmask object, precalculated sine-based rotation, fixed-point math, color oscillation.
Pure Sphinx C--, 8088+, direct VRAM writes with vertical retrace synchronization.