Star for Atari ASM

Author: dmsc
Category: Christmas Challenge
System:   Atari 8-bit
Language: Assembler
Len source code: 868
Len exe file:    67
Len code only:   61
Instructions:
  With the provided ATR disk image, just boot and type STAR to run the program.
Description:
  This program uses the function:

  S(X,Y) = (ABS( ABS(X) - ABS(Y) ) < 5) AND ( (ABS(x) < 5) OR (ABS(Y) < 5))

  This is calculated for each point in the X and Y ranges from -8 to 8, drawing
  a star character or a space.

Comments:
 To minimize size, this program directly calls the OS editor PUT routine, this
 means it is only compatible with the XL OS used in Atari XL and XE computers.

 Also, instead of printing the end-of-line character, it prints the full 38
 columns in a standard Atari screen.