cstart.a96

电力变电站RTU监控软件（80C196NT单片机） 遥控

;
; This is an example STARTUP file.
; @(#)cstart.a96      1.4 (nt-ef)
;
; To Assemble:
;	asm196 cstart.a96 oj(cstart.obj) cmain model(nt)
; The 'cmain' control will allow symbol 'main' to be used.
;
; If FPAL96 is used, enable the calling of 'fpinit'.
;
; Read Chapter 13 of Intel's 8xC196NT Microcontroller User's
; Manual very carefully.
; It tells you exactly how to access external memory, as this
; determines the usage of EPORT and P5.
; (Intel User's Manual Order number: 272317-002)
; Note that an example initialization is given below in comment.
;
cstart	module	cmain

$include(_SFR_INC_)

	rseg
	extrn	TMPREG0
	extrn	WORK
	extrn	WTMP
	cseg	at 0ff2080h
	public	_cstart
	extrn	fpinit:null
	extrn	main:null
	extrn	_main:null

_cstart:
	st	r0,epa8_time_3e;
	ld	sp,#STACK
	di;
	clr	WORK;
	inc	WORK;
; external memory access initialization:
	ldb	wsr, #3Fh		; 64 byte window at 1f80
					; From now on use SFR names with _3f suffix
	ldb	TMPREG0, #00
	stb	TMPREG0, ep_reg 	; set page number to 0
	ldb	TMPREG0, #0fh
	stb	TMPREG0, ep_mode	; use pins as extended address pins
	ldb	TMPREG0, #0ffh
	stb	TMPREG0, p5_mode	; set all pins to 'special function'


	ldb	TMPREG0, #00
	stb	TMPREG0, p6_mode	; set all pins to 'special function'
	ldb	TMPREG0, #00
	stb	TMPREG0, p6_dir;	; set all pins to 'special function'

	clr	WTMP;
loop:	inc	WTMP

	clr	WORK;
loop3:	inc	WORK
	ldb	TMPREG0, #0fh;
	stb	TMPREG0, p6_reg;	; set all pins to 'special function'
	ldb	TMPREG0, #4fh;
	stb	TMPREG0, p6_reg;	; set all pins to 'special function'
	cmp	WORK, #010000;
	jnc	loop3;

	cmp	WTMP, #2;
	jnc	loop;


if _24_BITS_ and _FAR_CODE_
;	ecall	fpinit
;	ejmp	main
	ejmp	_main
else
;	lcall	fpinit
;	ljmp	main
	ljmp	_main
endif

;
; Some applications might want to do a CALL to main,
; and also have exit() calls.
; In that case enable the following:
;if _24_BITS_ and _FAR_CODE_
;	ECALL	main
;else
;	LCALL	main
;endif
;
_exit:
	PUBLIC	_exit
	BR	_exit
;exit:
;	PUBLIC	exit
;_cstop:
;	PUBLIC	_cstop			; public for debuggers to set a breakpoint
;	BR	_cstop			; keep on looping

	end