xon.asm

来自「web51的开发库」· 汇编 代码 · 共 44 行

	.equ	WMCON, 0x96
.nolist
.include	"../include/param.inc"
.include	"../include/cpu.inc"
.list

.global	tstxonxoff0, tstxonxoff

;CPU_DIR	SEGMENT	CODE
;	RSEG	CPU_DIR
	.section cpu_dir, #alloc
;
	.word	'x'+'o'+'n'+'.'+'c'+'g'+'i'
	.byte	0x10		;cgi
	.byte	0		;reserved
	.word	cgibegin
	.word	cgiend
;
;CPU_FILES	SEGMENT	CODE
;	RSEG	CPU_FILES
	.section cpu_files, #alloc
;
cgibegin:		;xon.cgi
	.pcode tstxonxoff0
	.pcode pret
cgiend:
;
	.text
	.using	0
;
tstxonxoff0:
	mov	r6,#0
	mov	r7,state80
tstxonxoff:
	mov	dph,R6
	mov	dpl,R7
	ENABLE_EE
	movx	a,@dptr
	DISABLE_EE
	mov	C,B2B(ACC,optxonxoff)
	mov	zflag,C
	ret
	;; END