xmas23asm.prg

Author: Sven Bastrop / TGS
Category: Christmas Challenge
System:   C64
Language: Assembler
Len source code: 1212 bytes
Len exe file:      64 bytes
Len code only:     49 bytes

Instructions: Install vice, drag and drop the prg file into it.

Description:
A total of 3 loops are initiated.
The innermost loop places the 12 asterisks around a center point to form a diamond.
The other two loops placed three diamonds each in columns and rows.
The program takes advantage of the fact that some of the required values in the zero page have already been pre-assigned by the operating system.
At the end the program jumps into an endless loop.

Comments:
Thanks a lot for this event contest. Merry Christmas and a happy new year!