Spinstarr 2022

Author: erkkah
Category: Christmas Challenge
System:   IBM PC running DOS
Language: 8086 Assembler - nasm
Len source code: 331
Len exe file:    66
Len code only:   66
Instructions:
    Install dosbox and run "dosbox -conf dosbox.conf star.com"
Description:
    Draws a 17x9 isosceles triangle pointing downwards and rotates
    it in 90 degree steps to create the star shape.

    The triangle is drawn one transformed asterisk at a time with a lot of
    unnecessary over-drawing to create an animated effect at 4.77 MHz.
    Replacing the value 360 at the b: label with 4 removes the effect.

    The transformation includes stride scaling to avoid having to map row/col
    coordinates to memory locations separately.
Comments:
    This was fun!