VCCC2025 entry for TO8

Author: __sam__
Category: Christmas Challenge
System:   Squale Apollo 7
Language: Assembler 

Len source code: 1843 bytes (incl. comments)
Len exe file:    140 bytes (on disk)
Len code only:   133 bytes (in RAM)

Instructions:
=============
1) Download Mame.
   https://www.mamedev.org/
2) Add Squale Apollo 7 emulation roms.
   http://hxc2001.free.fr/Squale/
3) Launch the squale emulator
   $ mame squale -window -cart <path/to/>VCCC2025.rom
   Flex9 will boot.
4) Enter the date, eg. 25/12/2025
   Note: you might have to press the shift key
   a couple of times in order for the digit keys
   to work.
5) The "+++" Flex prompt appears.
6) Type VCCC2025 (case insensitive), and press ENTER.
7) Enjoy the snowflake being drawn char by char.

Description:
============
This is version is inspired by turtle moves in the logo 
language (relative rotation and motion), all with ascii 
control chars.

The code is loaded at $0000 but is relocatable. It should
work on any 6809-based Flex9 systems (Squale, Goupil G3, 
many SBCs).

Comments:
=========
I, had trouble finding a compiler working correcly with 
macros, so I quickly re-implemented the algorithm in an
other way.

I might be off delay, sorry guys.

Used tools:
* https://github.com/Arakula/A09 
* https://github.com/Samuel-DEVULDER/flextools

Note: the +++ appearing in the end is the flex prompt.