lc-asm.s

Contiki是一个开源

;
; Copyright (c) 2004, Adam Dunkels and Oliver Schmidt
; All rights reserved. 
;
; Redistribution and use in source and binary forms, with or without 
; modification, are permitted provided that the following conditions 
; are met: 
; 1. Redistributions of source code must retain the above copyright 
;    notice, this list of conditions and the following disclaimer. 
; 2. Redistributions in binary form must reproduce the above copyright 
;    notice, this list of conditions and the following disclaimer in the 
;    documentation and/or other materials provided with the distribution. 
; 3. Neither the name of the Institute nor the names of its contributors 
;    may be used to endorse or promote products derived from this software 
;    without specific prior written permission. 
;
; THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
; ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
; OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
; OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
; SUCH DAMAGE. 
;
; This file is part of the Contiki operating system.
; 
; Author: Adam Dunkels <[e-mail]>, Oliver Schmidt <[e-mail]>
;
; $Id: lc-asm.S,v 1.2 2007/04/14 15:48:42 oliverschmidt Exp $
;
;---------------------------------------------------------------------
	.importzp ptr1
	.export _lc_set
	.export _lc_resume
;---------------------------------------------------------------------
_lc_set:
	sta ptr1
	stx ptr1+1
	tsx
	lda $0102,x
	ldy #$01
	sta (ptr1),y
	lda $0101,x
	dey
	sta (ptr1),y
	rts
;---------------------------------------------------------------------
_lc_resume:	
	sta ptr1
	stx ptr1+1
	ldy #$01
	lda (ptr1),y
	beq :+
	tsx
	sta $0102,x
	dey
	lda (ptr1),y
	sta $0101,x
:	rts
;---------------------------------------------------------------------