;; Copyright (C) 2011 by Jonathan Appavoo, Boston University
;;
;; Permission is hereby granted, free of charge, to any person obtaining a copy
;; of this software and associated documentation files (the "Software"), to deal
;; in the Software without restriction, including without limitation the rights
;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;; copies of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:
;;
;; The above copyright notice and this permission notice shall be included in
;; all copies or substantial portions of the Software.
;; 
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
;; THE SOFTWARE.

.alias MEMSTART $0000
.alias CODE     $0200 
.alias RESETVEC $FFFC

.alias MEMEND   $FFFF

.org MEMSTART           ; set the orgin point to memstart which is 0000
                        ; this ensures that the p65 assembler will create a memory image
                        ; that starts right at the beginning of memory (the address space)

.advance CODE           ; set the insertion point to where we want our code to be
                        ; In this case we are skipping page 00 and page 01.  We place our instructions
                        ; at the beginning of page 02 
START:	LDX   #$00      ; Initialize the X register with 00 -- # is used to indicate that we want the immedidate version 
                        ; of loading the X register -- meaning that the address for the value to load into X is PC + 1
                        ; $00 places the value 00 at PC + 1 -- thus the immediate value being loaded into the X register 
                        ; is 0x00 
LOOP:   INX             ; increment the X register
	JMP   LOOP      ; jump back to the beginning -- loop forever

.advance RESETVEC
.word START
	
.advance MEMEND
.byte $00