rzksystemtimerisrentry.s

zilog的实时操作系统RZK,可以移植到多种处理器上

;/*
;* File				:	SystemTimerISRProlog
;*
;* Description		:	Defines RZK's prolog.
;* 
;* Copyright 2004 ZiLOG Inc.  ALL RIGHTS RESERVED.
;*
;* This file contains unpublished confidential and proprietary information
;* of ZiLOG, Inc.
;* NO PART OF THIS WORK MAY BE DUPLICATED, STORED, PUBLISHED OR DISCLOSED 
;* IN ANY FORM WITHOUT THE PRIOR WRITTEN CONSENT OF ZiLOG, INC.
;* This is not a license and no use of any kind of this work is authorized
;* in the absence of a written license granted by ZiLOG, Inc. in ZiLOG's 
;* sole discretion 
;*/
        extern _RZKSystemTimerISR
        extern _RZKSuspendInterruptThread
        extern _cIer
        extern _cCtl
        .assume	adl=1

;/* Function		:	_RZKSystemTimerIsrEntry
;*
;* Description		:	ISR entry point function
;* 
;* Inputs			:	None.
;*							
;* Outputs			:	None.
;*							
;*
;* Dependencies		:	None.
;*/
	.def _RZKSystemTimerIsrEntry
_RZKSystemTimerIsrEntry:
  rzksystem:
        Call _RZKSystemTimerISR
		DI

.if _EZ80F91
		LD A, (_cIer)
		LD BC,0
		LD C,A
		IN A,(BC)
		SET   0, A
		OUT (BC), A
.else
		LD A, (_cCtl)
		LD BC,0
		LD C,A
		IN A,(BC)
		SET   6, A
		OUT (BC), A
.endif                               
		Call	_RZKSuspendInterruptThread
		EI
		jp  rzksystem

		RET