; HelloWorld.asm
; Inspired by example 2.1 from the texbook by Fredrick M. Cady
; and by Prof. Gilbert Arbez from the University of Ottawa

; Prints "Hello World" to the screen

; Constants

CR  equ $0d   	; Carriage return
LF  equ $0a	; line feed
EOS equ $00     ; End of String

; Adress of sub-routine
printf equ $EE88

; Memory Map Constants
PROG  equ $2000 ; RAM
STACK equ $2000 ; End of stack

; Start of Program

	ORG PROG  ; Put the program in memory
	lds #STACK ; initialize the stack

loop:
	ldd #HELLO	; Find the adress of the message
	jsr printf	; sub-routine for printing the message
	bra loop	; Repeat forever

; The message in memory
HELLO		DC.B 'Hello World',CR,LF,EOS