.equ	ACD	=7
          .equ	ACO	=5
          .equ	ACI	=4
          .equ	ACIE	=3
          .equ	ACIC	=2
          .equ	ACIS1	=1
          .equ	ACIS0	=0
         
          .equ	MUX2	=2
          .equ	MUX1	=1
          .equ	MUX0	=0
         
          .equ	ADEN	=7
          .equ	ADSC	=6
          .equ	ADFR	=5
          .equ	ADIF	=4
          .equ	ADIE	=3
          .equ	ADPS2	=2
          .equ	ADPS1	=1
          .equ	ADPS0	=0
         
          .def	XL	=r26
          .def	XH	=r27
          .def	YL	=r28
          .def	YH	=r29
          .def	ZL	=r30
          .def	ZH	=r31
         
          .equ 	RAMEND  =$25F	;Last On-Chip SRAM location
          .equ	XRAMEND =$25F
          .equ	E2END	=$1FF
          .equ	FLASHEND=$FFF
         
          .equ	INT0addr=$001	;External Interrupt0 Vector Address
          .equ	INT1addr=$002	;External Interrupt1 Vector Address
          .equ	OC2addr =$003	;Timer2 compare match Vector Address
          .equ	OVF2addr=$004	;Timer2 overflow Vector Address
          .equ	ICP1addr=$005	;Timer1 Input Capture Vector Address
          .equ	OC1Aaddr=$006	;Timer1 Output Compare A Interrupt Vector Address
          .equ	OC1Baddr=$007	;Timer1 Output Compare B Interrupt Vector Address
          .equ	OVF1addr=$008	;Overflow1 Interrupt Vector Address
          .equ	OVF0addr=$009	;Overflow0 Interrupt Vector Address
          .equ	SPIaddr =$00A	;SPI Interrupt Vector Address
          .equ	URXCaddr=$00B	;UART Receive Complete Interrupt Vector Address
          .equ	UDREaddr=$00C	;UART Data Register Empty Interrupt Vector Address
          .equ	UTXCaddr=$00D	;UART Transmit Complete Interrupt Vector Address
          .equ	ADCCaddr=$00E	;ADC Conversion Complete Interrupt Vector Address
          .equ	ERDYaddr=$00F	;EEPROM Write Complete Interrupt Vector Address
          .equ	ACIaddr =$010	;Analog Comparator Interrupt Vector Address           .def   TEMP  =r16
           .def   TEMP1 =r17
           .def   temp2 =r18 
           .def   temp3 =r19
           .def   CNT   =r20
           .def   SCNN  =r21
           .def   KSNI  =r22
           .def   SCNDP =r23
           .def   KEYN  =r24
           .def   cnt1 =r25
           .def   hour=r24
           .def   minute=r22
           .def   second=r21
           .equ label=$0f00	;字形表首址
          .org $0000
000000 c02f      	rjmp reset
          .org $007
000007 e608      intt0:	ldi temp,104 	;因25ms內差40us故補上40/(1/8)即320個CK。
000008 950a      bu:	dec temp	;因中斷需4CK這樣:4+104*(1+2)+1+1+1+1=320。
000009 f7f1      	brne bu
00000a 0000      	nop
00000b 9593      	inc cnt1 		;cnt1計數40次為1秒鐘。
00000c e30d      	ldi temp,256-195	;計數(256-195)次才產生1次中斷。
00000d bf02      	out tcnt0,temp		;CK/1024分頻,這樣一次中斷需25ms。
00000e c074      	rjmp recog
          .org $030
          reset:	
000030 e50f      	ldi temp,low(ramend)	;設置堆棧指針。
000031 bf0d      	out spl,temp
000032 e002      	ldi temp,high(ramend)
000033 bf0e      	out sph,temp
000034 2422      	clr r2			;清工作寄存器。
000035 2433      	clr r3
000036 2444      	clr r4
000037 2455      	clr r5
000038 2466      	clr r6
000039 2477      	clr r7
00003a 27ff      	clr zh
00003b 27bb      	clr xh
00003c 27dd      	clr yh
00003d 2788      	clr keyn
00003e 2755      	clr second
00003f 2766      	clr minute
000040 2788      	clr hour
000041 2744      	clr cnt
000042 27dd      	clr yh
000043 e800      	ldi temp,$80
000044 2e80      	mov r8,temp		;R8=$80
000045 e6c0      	ldi yl,$60		;設置顯示內存地址指針Y為$0060.
000046 d06b      	rcall disram		;調用DISRAM。
000047 8108      	ld temp,y
000048 e810      	ldi temp1,$80		
000049 0f01      	add temp,temp1
00004a 8308      	st y,temp		
00004b e007      scanad: ldi temp,$07
00004c e6c0      	ldi yl,$60
00004d d090       scann:	rcall scan1		;調用鍵掃顯示子程序SCAN1。
00004e f3f6      	brts scann		
00004f d08e       scank:	rcall scan1		
000050 f7f6      	brtc scank		
000051 d08c      	rcall scan1
000052 0000       scans: nop			
000053 3180             	cpi keyn,$10		;KEYN=$10轉EXEC。
000054 f428       	brcc exec    
000055 d06f       	rcall wraddram		;調用WRADDRAM。
000056 950a      	dec temp		;TEMP減1。	
000057 3001      	cpi temp,$01	
000058 f7a1      	brne scann		;TEMP=1則轉SCANN
000059 cff1      	rjmp scanad
00005a 2d17      exec:	mov temp1,r7	;把r7,r6的兩個十進制換成一個十六進制入hour中
00005b 2d06      	mov temp,r6		
00005c d04a      	rcall dechex		
00005d 2f80      	mov hour,temp           
00005e 2d15      	mov temp1,r5	;把r5,r4的兩個十進制換成一個十六進制入minute中	
00005f 2d04      	mov temp,r4
000060 d046      	rcall dechex
000061 2f60      	mov minute,temp
000062 2d13      	mov temp1,r3	;把r3,r2的兩個十進制換成一個十六進制入second中
000063 2d02      	mov temp,r2
000064 d042      	rcall dechex
000065 2f50      	mov second,temp
000066 e005      	ldi temp,$05		;T0設置為CK/1024分頻。	
000067 bf03      	out tccr0,temp
000068 e30d      	ldi temp,256-195
000069 bf02      	out tcnt0,temp		;裝載T0時間常數。
00006a ef0f      	ldi temp,$ff		;設置b口,d口為輸出
00006b bb07      	out ddrb,temp
00006c bb01      	out ddrd,temp
00006d 9478      	sei			;開中斷總開關
00006e e002      	ldi temp,$02		
00006f bf09      	out timsk,temp		;允許t0中斷。
000070 d041      display:rcall disram		;調用disram
000071 27dd      	clr yh			;設置顯示內存地址指針Y為$0060
000072 e6c0      	ldi yl,$60
000073 ed7f      	ldi scndp,$df		;設置掃描顯示碼SCNDP起址0B11011111.
000074 9019      agdis:	ld r1,y+
000075 36c2      	cpi yl,$62
000076 f409      	brne npoint
000077 0c18      	add r1,r8
000078 36c4      npoint:	cpi yl,$64
000079 f409      	brne next
00007a 0c18      	add r1,r8
00007b ba18      next:	out portb,r1		;把R1送B口顯示
00007c bb72      	out portd,scndp		;掃亮某個數碼管
00007d 9408      	sec			;C=1
00007e 9577      	ror scndp 		;右移SCNDP
00007f d056      	rcall delay		;延時
000080 36c6      	cpi yl,$66
000081 f791      	brne agdis		;未掃亮最后一位繼續
000082 cfed      	rjmp display
000083 3298      recog:	cpi cnt1,40		;40次中斷為40*25ms=1秒
000084 f4d1      	brne inthome		;40次中斷未到轉inthome
000085 2799      	clr cnt1		;40次中斷到則清cnt1
000086 9553      	inc second		;秒寄存器加1
000087 335c      	cpi second,60		
000088 f451      	brne change		;秒寄存器未滿轉change
000089 2755      	clr second		;否則清秒寄存器
00008a 9563      	inc minute		;分寄存器加1
00008b 336c      	cpi minute,60
00008c f431      	brne change		;分寄存器未滿轉change
00008d 2766      	clr minute		;否則清分寄存器
00008e 9583      	inc hour		;時寄存器加1	
00008f 3188      	cpi hour,24
000090 f411      	brne change		;時寄存器未滿轉change
000091 2788      	clr hour		;否則清時寄存器
000092 9518      	reti			;中斷返回
000093 2f05      change: mov temp,second	;把second中的十六進制轉換成二個十進制數存入r3,r2中
000094 d00b      	rcall hexdec
000095 2e31      	mov r3,temp1
000096 2e20      	mov r2,temp
000097 2f06      	mov temp,minute ;把minute中的十六進制轉換成二個十進制數存入r5,r4中
000098 d007      	rcall hexdec
000099 2e51      	mov r5,temp1
00009a 2e40      	mov r4,temp	
00009b 2f08      	mov temp,hour   ;把hour中的十六進制轉換成二個十進制數存入r7,r6中
00009c d003      	rcall hexdec
00009d 2e71      	mov r7,temp1
00009e 2e60      	mov r6,temp
00009f 9518      inthome:reti		;中斷返回
0000a0 2711      hexdec: clr temp1     ;把temp中的十六進制轉成二個十進制入temp1,temp中的子程序
0000a1 500a      hexdec1:subi temp,10	
0000a2 f010      	brcs negs
0000a3 9513      	inc temp1
0000a4 cffc      	rjmp hexdec1
0000a5 5f06      negs:   subi temp,$f6
0000a6 9508      	ret  			;子程序返回
0000a7 930f      dechex: push temp	;把temp1,temp的兩個十進制數轉換成一個十六進制入temp中
0000a8 e02a      	ldi temp2,$0a
0000a9 2700      	clr temp
0000aa 3010      dechex1:cpi temp1,$00
0000ab f019      	breq dh
0000ac 951a      	dec temp1
0000ad 0f02      	add temp,temp2
0000ae cffb      	rjmp dechex1
0000af 911f      dh:	pop temp1
0000b0 0f01      	add temp,temp1
0000b1 9508      	ret			;子程序返回
0000b2 93cf      disram: push yl		;壓棧保護	
0000b3 93ef      	push zl
0000b4 93af      	push xl
0000b5 e1fe      	ldi zh,high(label*2)	;Z指針指向字形表首址label*2
0000b6 e0e0      	ldi zl,low(label*2)
0000b7 27bb      	clr xh
0000b8 e6a0      	ldi xl,$60
0000b9 e0c7      	ldi yl,$07
0000ba 8128      ramag:	ld temp2,y		;y為間址的內容送temp2
0000bb 95ca      	dec yl			
0000bc 2fe2      	mov zl,temp2		
0000bd 95c8      	lpm 			
0000be 920d      	st x+,r0		;把r0的內容送到$0060-$0065中
0000bf 36a6      	cpi xl,$66
0000c0 f7c9      	brne ramag
0000c1 91af      	pop xl
0000c2 91ef      	pop zl
0000c3 91cf      	pop yl			;退棧
0000c4 9508      	ret		;子程序返回	
0000c5 930f      wraddram:push temp		;讀鍵存入顯示內存及寄存器中。
0000c6 27ff      	clr zh			
0000c7 2fe0      	mov zl,temp
0000c8 8380      	st z,keyn
0000c9 e1fe      	ldi zh,high(label*2)
0000ca 2fe8      	mov zl,keyn
0000cb 95c8      	lpm	
0000cc 9209      	st y+,r0
0000cd 36c6      	cpi yl,$66
0000ce f409      	brne pointc
0000cf e6c0      	ldi yl,$60
0000d0 8128      pointc:	ld temp2,y
0000d1 e830      	ldi temp3,$80
0000d2 0f23      	add temp2,temp3
0000d3 8328      	st y,temp2
0000d4 910f      	pop temp		
0000d5 9508      	ret		;子程序返回
0000d6 930f      delay:  push temp	;延時子程序
0000d7 e120      lp1:	ldi temp2,$10
0000d8 950a      lp2:	dec temp
0000d9 f7f1      	brne lp2
0000da 952a      	dec temp2
0000db f7e1      	brne lp2
0000dc 910f      	pop temp 	
0000dd 9508      	ret		;子程序返回
0000de 93bf       SCAN1:	        push xh			;鍵盤掃描顯示子程序。
0000df 93af      		PUSH XL
0000e0 931f      		PUSH TEMP1
0000e1 930f      		PUSH TEMP
0000e2 e6a0      	 	LDI XL,$60
0000e3 9468               	SET
0000e4 e050               	LDI  SCNN,$00
0000e5 ed7f                	LDI  SCNDP,0B11011111
0000e6 e046               	LDI  CNT,$06
0000e7 ef67               	LDI  KSNI,0B11110111
0000e8 ef0f      	  COL1:	LDI  TEMP,$FF
0000e9 bb07               	OUT  DDRb,TEMP
0000ea bb04               	OUT  DDRC,TEMP
0000eb bb05      		OUT  PORTC,TEMP 
0000ec bb01               	OUT  DDRd,TEMP
0000ed bb72      		OUT  PORTd,SCNDP
0000ee 901d               	LD   R1,X+
0000ef ba18               	OUT  PORTb,R1
0000f0 dfe5               	RCALL  DELAY
0000f1 2f04               	MOV  TEMP,CNT
0000f2 5003               	SUBI  TEMP,$03
0000f3 f0a0               	BRCS  NOSK
0000f4 e014               	LDI  TEMP1,$04
0000f5 e00f               	LDI  TEMP,0B00001111
0000f6 bb04               	OUT  DDRc,TEMP
0000f7 bb65      	        OUT  PORTc,KSNI
0000f8 d01b               	RCALL  DELYT
0000f9 b303               	IN   TEMP,PINc
0000fa 7f00               	ANDI  TEMP,0B11110000
0000fb 9502               	SWAP  TEMP
0000fc 9408                KROW: SEC 
0000fd 9507              	ROR  TEMP
0000fe f020               	BRCS  NOKEY
0000ff 94e8               	CLT
000100 2f85               	MOV   KEYN,SCNN
000101 9b87      	 	SBIS PINd,$07
000102 9640      	 	ADIW KEYN,$10	
000103 9553               NOKEY: INC  SCNN
000104 951a                	DEC  TEMP1
000105 f7b1                	BRNE  KROW
000106 9408                	SEC
000107 9567                	ROR  KSNI
000108 9408           	  NOSK: SEC
000109 9577                	ROR  SCNDP
00010a 954a                	DEC  CNT
00010b f6e1                	BRNE  COL1
00010c ef0f                	LDI   TEMP,$FF
00010d bb04                	OUT   DDRC,TEMP
00010e bb05      		OUT   PORTC,TEMP
00010f 910f      	 	POP TEMP
000110 911f      	  	POP TEMP1
000111 91af      		POP XL     
000112 91bf      		pop xh   
000113 9508      	  	RET
000114 e230               delyt:	ldi temp3,$20		
000115 953a      	   dt31:dec temp3
000116 f7f1      	 	brne dt31
000117 9508      	 	ret
         
           .cseg
           .org $0f00 
            .dw 0x063f,0x4f5b,0x6d66,0x077d
000f00 063f
000f01 4f5b
000f02 6d66
000f03 077d
            .dw 0x6f7f,0x7c77,0x5e39,0x7179		000f04 6f7f
000f05 7c77
000f06 5e39
000f07 7179

Assembly complete with no errors.