************************************************
* FileName:		ex6.asm                        *
* Description:	硬件中斷實驗                   *
* Copyright(C) SanZhi Electronic, Author Zpin  *
************************************************



		.title 	"ex6"
		.global _c_int00
		.mmregs

KEY_ADDR	.set	0a008h
D_LED_ADDR	.set	0b000h

KEY_CODE1	.set	60h
KEY_CODE2	.set	61h

CONVERT		.macro	rawdata
            STM #4000h,AR3
            ANDM #001Fh,rawdata
            LD rawdata,A
            ADD AR3,A
			STL A,AR3
			nop
			nop
			LD *AR3,A
			STL A,rawdata
			nop
			nop
			nop
			nop
			.endm

		.data
		.word 00h,3F06h,0605h,5B04h,4f03h,6602h,6d01h,7d06h,0705h,7f04h,6f03h,07702h,07c01h,3906h,5e05h,07904h,07103h,8002h
        ;BCD CODE  0      1     2     3     4     5     6     7      8    9     a      b      c     d     e      f      .
        ;hight 8 bit enable,low 8 bit is address 
        .sect ".vectors"
rst:	B _c_int00
		NOP
		NOP
		.space 17*4*16
int2:	B _onkey
		NOP
		NOP
		.space 13*4*16

		.text
_c_int00:
		LD #0h,DP
		STM #3000h,SP
		SSBX INTM
		ssbx XF
		STM #07FFFh,SWWSR
		
		ST #0000h,KEY_CODE2
		
		STM #0ffffh,IFR
		ORM #0004h,IMR
		
		RSBX INTM
		

susp:	PORTW KEY_CODE2,D_LED_ADDR	;顯示到數碼管
        rpt #0ffffh
        NOP
		NOP
		B susp
		
_onkey:	nop
		rpt #0ffffh
		nop
		nop
		rpt #0ffffh
		nop
		nop
		rpt #0ffffh
		nop
		nop
		rpt #0ffffh
		nop
		nop

		PORTR KEY_ADDR,KEY_CODE2	;讀取按鍵
		CONVERT KEY_CODE2            ;將按鍵碼轉換成顯示碼
exit	rpt #0ffffh
		nop
		nop
		rpt #0ffffh
		nop
		nop
		rpt #0ffffh
		nop
		nop
		STM #0ffffh,IFR
		RETE