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📄 intf.asm

📁 用于将两个两字节十六进制数据转为浮点数后进行乘除加法运算
💻 ASM
字号:
INTF:MOV A,30H
         MOV R2,A
         MOV A,31H
         MOV R3,A
         MOV R1,#36H
         LCALL INF
         MOV A,32H
         MOV R2,A
         MOV A,33H
         MOV R3,A
         MOV R1,#39H
         LCALL INF
         MOV R0,#36H
         MOV R1,#39H
         CALL FMUL      ;@R0(3031)*@R1(3233)----R4R2R3
         MOV R1,#3CH    ;R4R2R3----@R1(3C-3E)
         CALL FSTR
ITF:MOV A,40H     ;ITF-INT:4041/4243送入4C-4E
        MOV R2,A
        MOV A,41H
        MOV R3,A
        MOV R1,#46H
        LCALL INF
        MOV A,42H
        MOV R2,A
        MOV A,43H
        MOV R3,A
        MOV R1,#49H
        LCALL INF
NF:MOV R0,#46H
       MOV R1,#49H
       CALL FDIV
       MOV R1,#4CH
       CALL FSTR
INT:MOV R0,#49H
MOV R1,#4CH
LCALL FADD
MOV R1,#4CH
LCALL FSTR
EE:MOV R0,#4CH
        LCALL FINT
ED:SJMP $
INF:MOV R6,#16
SETB C
CLR F0
CALL FSDT
MOV A,R6
MOV R4,A
CALL FSTR
RET
FINT:MOV R6,#00H
MOV R7,#00H
CLR F0
INC R0
MOV A,@R0
MOV R2,A
INC R0
MOV A,@R0
MOV R3,A
DEC R0
DEC R0
MOV A,@R0
MOV C,ACC.7
MOV 3CH,C
CLR ACC.7
JNB ACC.6,FIN1
MOV R2,#00H
MOV R3,#00H
RET
FIN1:CJNE A,#11H,$+3
JC FIN3
SETB F0
MOV R2,#00H
MOV R3,#00H
RET
FIN3:CJNE A,#10H,FIN4
MOV A,R6
ANL A,#80H
JZ FIN5
CLR C
MOV A,R3
ADDC A,#01H
MOV R3,A
MOV A,R2
ADDC A,#00H
MOV R2,A
FIN5:RET
FIN4:CLR C
XCH A,R2
RRC A
XCH A,R2
XCH A,R3
RRC A
XCH A,R3
MOV B,A
MOV A,R6
RRC A
MOV R6,A
MOV A,R7
RRC A
MOV R7,A
MOV A,B
INC A
SJMP FIN3
ORG 0900H
DMUL:MOV   A,R3
MOV   B,R5
MUL   AB
MOV   R7,B
MOV   A,R3
MOV   B,R4
MUL   AB
ADD   A,R7
MOV   R7,A
CLR   A
ADDC  A,B
MOV   R3,A
MOV   A,R2
MOV   B,R5
MUL   AB
ADD   A,R7
MOV   R7,A
MOV   A,R3
ADDC  A,B
MOV   R3,A
MOV   0D5H,C
MOV   A,R2
MOV   B,R4
MUL   AB
ADD   A,R3
MOV   R3,A
CLR   A
ADDC  A,B
MOV   C,0D5H
ADDC  A,#00H
MOV   R2,A
RET
DDIV:MOV   A,R1
PUSH  ACC
MOV   B,#10H
DV0:CLR   C
MOV   A,R6
RLC   A
MOV   R6,A
MOV   A,R7
RLC   A
MOV   R7,A
MOV   A,R3
RLC   A
MOV   R3,A
XCH   A,R2
RLC   A
XCH   A,R2
MOV   0D5H,C
CLR   C
SUBB  A,R5
MOV   R1,A
MOV   A,R2
SUBB  A,R4
JB    0D5H,DV1
JC    DV2
DV1:MOV   R2,A
MOV   A,R1
MOV   R3,A
INC   R6
DV2:DJNZ  B,DV0
POP   ACC
MOV   R1,A
MOV   A,R7
MOV   R2,A
MOV   A,R6
MOV   R3,A
RET
FMLD:MOV   A,@R0
MOV   R6,A
INC   R0
MOV   A,@R0
MOV   R2,A
INC   R0
MOV   A,@R0
MOV   R3,A
DEC   R0
DEC   R0
MOV   A,@R1
MOV   R7,A
INC   R1
MOV   A,@R1
MOV   R4,A
INC   R1
MOV   A,@R1
MOV   R5,A
DEC   R1
DEC   R1
RET
FABP:MOV   A,R6
MOV   C,0E7H
MOV   38H,C
XRL   A,R7
JNB   0E7H,ABP0
CPL   3AH
ABP0:MOV   A,R6
MOV   C,0E6H
MOV   0E7H,C
MOV   R6,A
MOV   A,R7
MOV   C,0E6H
MOV   0E7H,C
MOV   R7,A
CLR   C
MOV   A,R6
SUBB  A,R7
JZ    ABP1
CLR   0D5H
CLR   39H
JB    0E7H,ABP5
CJNE  R4,#00H,ABP6
CJNE  R5,#00H,ABP6
ABP1:JB    3AH,ABP8
MOV   A,R3
ADD   A,R5
MOV   R3,A
MOV   A,R2
ADDC  A,R4
MOV   R2,A
JNC   ABP3
SETB  39H
CLR   C
ABP2:CLR   0D5H
LCALL FSDT
ABP3:CJNE  R2,#00H,ABP4
CJNE  R3,#00H,ABP4
MOV   R4,#41H
RET
ABP4:MOV   A,R6
MOV   C,38H
MOV   0E7H,C
XCH   A,R4
MOV   R6,A
RET
ABP5:CJNE  R2,#00H,ABP7
CJNE  R3,#00H,ABP7
MOV   A,R7
MOV   R6,A
SJMP  ABP1
ABP6:CPL   0D5H
ABP7:CLR   C
LCALL FSDT
SJMP  ABP0
ABP8:MOV   A,R3
CLR   C
SUBB  A,R5
MOV   R3,A
MOV   A,R2
SUBB  A,R4
MOV   R2,A
JNC   ABP9
CLR   A
CLR   C
SUBB  A,R3
MOV   R3,A
CLR   A
SUBB  A,R2
MOV   R2,A
CPL   38H
ABP9:SETB  C
SJMP  ABP2
FADD:CLR   3AH
LCALL FMLD
LCALL FABP
RET
FSUB:SETB  3AH
LCALL FMLD
LCALL FABP
RET
FMUL: LCALL FMLD
MOV   A,R6
XRL   A,R7
MOV   C,0E7H
MOV   38H,C
LCALL DMUL
MOV   A,R7
MOV   C,0E7H
MOV   0D5H,C
MOV   A,@R0
ADD   A,@R1
MOV   R6,A
SETB  C
LCALL FSDT
MOV   A,R6
MOV   C,38H
MOV   0E7H,C
MOV   R4,A
RET
FDIV:LCALL FMLD
MOV   A,R6
XRL   A,R7
MOV   C,0E7H
MOV   38H,C
CLR   A
MOV   R6,A
MOV   R7,A
CJNE  R4,#00H,FDV0
CJNE  R5,#00H,FDV0
SETB  C
RET
FDV0:MOV   A,R3
SUBB  A,R5
MOV   A,R2
SUBB  A,R4
JC    FDV1
CLR   0D5H
CLR   39H
LCALL FSDT
MOV   A,R7
RRC   A
MOV   R7,A
CLR   C
SJMP  FDV0
FDV1:CLR   A
XCH   A,R6
PUSH  ACC
LCALL DDIV
POP   ACC
ADD   A,@R0
CLR   C
SUBB  A,@R1
MOV   C,38H
MOV   0E7H,C
MOV   R4,A
CLR   C
RET
FSTR:MOV   A,R4
MOV   @R1,A
INC   R1
MOV   A,R2
MOV   @R1,A
INC   R1
MOV   A,R3
MOV   @R1,A
DEC   R1
DEC   R1
RET
FSQR:MOV   A,@R0
JB    0E7H,FQR2
MOV   @R1,A
INC   R0
INC   R1
MOV   A,@R0
MOV   @R1,A
INC   R0
INC   R1
MOV   A,@R0
MOV   @R1,A
DEC   R0
DEC   R0
DEC   R1
DEC   R1
FQR0:LCALL FDIV
MOV   R6,A
MOV   A,@R1
MOV   R7,A
INC   R1
MOV   A,@R1
MOV   R4,A
INC   R1
MOV   A,@R1
MOV   R5,A
DEC   R1
DEC   R1
CLR   3AH
LCALL FABP
CLR   0D5H
MOV   A,R4
DEC   A
CLR   0E7H
MOV   R4,A
MOV   B,R7
CLR   0F7H
CJNE  A,B,FQR1
MOV   A,R5
SUBB  A,R3
ANL   A,#0FCH
MOV   R7,A
MOV   A,R6
SUBB  A,R2
JNZ   FQR1
CJNE  R7,#00H,FQR1
SETB  0D5H
FQR1:LCALL FSTR
JNB   0D5H,FQR0
RET
FQR2:CLR   0D5H
RET
FSDT:JC    FDT1
MOV   C,39H
JB    0D5H,FDT0
MOV   A,R2
RRC   A
MOV   R2,A
MOV   A,R3
RRC   A
MOV   R3,A
INC   R6
RET
FDT0:MOV   A,R4
RRC   A
MOV   R4,A
MOV   A,R5
RRC   A
MOV   R5,A
INC   R7
RET
FDT1:MOV   A,R2
JNZ   FDT3
CJNE  R3,#00H,FDT4
MOV   R6,#42H
FDT2:RET
FDT3:JB    0E7H,FDT2
FDT4:MOV   C,0D5H
MOV   A,R3
RLC   A
MOV   R3,A
MOV   A,R2
RLC   A
MOV   R2,A
CLR   0D5H
DEC   R6
SJMP  FDT1
FPLN: POP   DPH
POP   DPL
CLR   A
MOVC  A,@A+DPTR
MOV   R6,A
INC   DPTR
CLR   A
MOVC  A,@A+DPTR
MOV   R2,A
INC   DPTR
CLR   A
MOVC  A,@A+DPTR
MOV   R3,A
INC   DPTR
FPL2: MOV   A,@R0
XRL   A,R6
MOV   C,0E7H
MOV   38H,C
INC   R0
MOV   A,@R0
MOV   R4,A
INC   R0
MOV   A,@R0
MOV   R5,A
DEC   R0
DEC   R0
LCALL DMUL
MOV   A,R2
JB    0E7H,FPL1
MOV   A,R7
RLC   A
MOV   A,R3
RLC   A
MOV   R3,A
MOV   A,R2
RLC   A
MOV   R2,A
DEC   R6
FPL1: MOV   A,R6
ADD  A,@R0
MOV   C,38H
MOV   0E7H,C
MOV   R6,A
CLR   A
MOVC  A,@A+DPTR
MOV   R7,A
INC   DPTR
CLR   A
MOVC  A,@A+DPTR
MOV   R4,A
INC   DPTR
CLR   A
MOVC  A,@A+DPTR
MOV   R5,A
INC   DPTR
CLR   3AH
LCALL FABP
MOV   A,R4
MOV   R6,A
CLR   A
MOVC  A,@A+DPTR
CJNE  A,#40H,FPL2
LCALL FSTR
INC   DPTR
CLR   A
JMP   @A+DPTR
FBTD: MOV   A,@R0
MOV   C,0E7H
MOV   3CH,C
MOV   C,0E6H
MOV   0E7H,C
MOV   R6,A
INC   R0
MOV   A,@R0
MOV   R2,A
INC   R0
MOV   A,@R0
MOV   R3,A
DEC   R0
DEC   R0
CJNE  R2,#00H,FBT1
CJNE  R3,#00H,FBT1
CLR   A
MOV   @R1,A
INC   R1
MOV   @R1,A
INC   R1
MOV   @R1,A
INC   R1
MOV   @R1,A
INC   R1
MOV   @R1,A
INC   R1
MOV   @R1,A
FB13: DEC   R1
DEC   R1
DEC   R1
DEC   R1
DEC   R1
RET
FBT1: MOV   @R1,#00H
JB    3EH,FBT2
DEC   @R1
FBT2: INC   R1
 MOV   @R1,#01H
 JNB   3EH,FBT3
 INC   @R1
 JNB   3FH,FBT3
 INC   @R1
FBT3: MOV   A,R6
CLR   C
SUBB  A,@R1
JZ    FBT4
JNB   0E6H,FBT5
FBT0:DEC   @R1
DEC   @R1
DEC   @R1
DEC   @R1
FB15: MOV   A,R6
CLR   C
SUBB  A,@R1
JZ    FBT6
JB    0E6H,FBT7
FB16: JNB   3EH,FBT8
DEC   R6
JNB   3FH,FBT8
DEC   R6
FBT8: CJNE  R6,#00H,FBT9
MOV   R6,#05H
JNB   3EH,FB10
MOV   R7,#01H
JNB   3FH,FB11
INC   R7
FB11: CLR   A
CLR   C
FB12: XCH   A,R3
RLC   A
XCH   A,R3
XCH   A,R2
RLC   A
XCH   A,R2
RLC   A
DJNZ  R7,FB12
DEC   R6
MOV   @R1,A
INC   R1
FB10: MOV   A,R3
MOV   B,#0AH
MUL   AB
MOV   R3,A
MOV   R7,B
MOV   A,R2
MOV   B,#0AH
MUL   AB
ADD   A,R7
MOV   R2,A
CLR   A
ADDC  A,B
MOV   @R1,A
INC   R1
DJNZ  R6,FB10
DEC   R1
SJMP  FB13
FBT4: MOV   A,R2
SUBB  A,#80H
JC    FBT0
FBT5: MOV   R5,#0CDH
MOV   R4,#0CCH
LCALL DMUL
MOV   A,R2
JB    0E7H,FB14
MOV   A,R7
MOV   C,0E7H
ORL   C,0E6H
MOV   A,R3
RLC   A
MOV   R3,A
MOV   A,R2
RLC   A
MOV   R2,A
DEC   R6
FB19: MOV   A,R6
ADD   A,#0FDH
MOV   R6,A
DEC   R1
INC   @R1
INC   R1
SJMP  FBT3
FB18: SJMP  FB15
FBT9: MOV   A,R2
RRC   A
MOV   R2,A
MOV   A,R3
RRC   A
MOV   R3,A
INC   R6
SJMP  FBT8
FBT6: MOV   A,#0CBH
CLR   C
SUBB  A,R3
MOV   A,#0CCH
SUBB  A,R2
JC    FB16
FBT7: MOV   R4,#0A0H
MOV   R5,#00H
LCALL DMUL
MOV   A,R2
JB    0E7H,FB17
MOV   A,R7
MOV   C,0E7H
ORL   C,0E6H
MOV   A,R3
RLC   A
MOV   R3,A
MOV   A,R2
RLC   A
MOV   R2,A
DEC   R6
FB20: MOV   A,R6
ADD   A,#04H
MOV   R6,A
DEC   R1
DEC   @R1
INC  R1
SJMP  FB18
FB14: MOV   A,R7
JNB   0E7H,FB19
MOV   A,R3
ORL   A,#01H
MOV   R3,A
SJMP  FB19
FB17: MOV   A,R7
JNB   0E7H,FB20
MOV   A,R3
ORL   A,#01H
MOV   R3,A
SJMP  FB20
FSIN:   MOV   @R1,#7FH
INC   R1
MOV   @R1,#0A2H
INC   R1
MOV   @R1,#0FAH
DEC   R1
DEC   R1
LCALL FMUL
MOV   A,R0
PUSH  ACC
INC   SP
MOV   A,SP
INC   SP
INC   SP
XCH   A,R1
MOV   R0,A
MOV   A,R4
CLR   0E7H
MOV   R4,A
JZ    FSN1
JNB   0E6H,FSN2
FSN1: MOV   R4,#42H
MOV   R2,#00H
MOV   R3,#00H
SJMP  FSN3
FSN4: CLR   C
MOV   A,R2
RRC   A
MOV   R2,A
MOV   A,R3
RRC   A
MOV   R3,A
INC   R4
FSN2: CJNE  R4,#10H,FSN4
FSN3: MOV   A,R3
MOV   C,0E0H
MOV   3BH,C
JNB   38H,FSN5
CPL   3BH
FSN5: MOV   A,R4
MOV   R6,A
SETB  C
CLR   0D5H
LCALL FSDT
MOV   A,R6
MOV   C,38H
MOV   0E7H,C
MOV   R4,A
LCALL FSTR
MOV   @R0,#02H
INC   R0
MOV   @R0,#0C9H
INC   R0
MOV   @R0,#10H
DEC   R0
DEC   R0
LCALL FMUL
MOV   A,R0
XCH   A,R1
DEC   A
MOV   SP,A
LCALL FSTR
POP   ACC
PUSH  ACC
MOV   R0,A
LCALL FSUB
MOV   A,R4
CLR   0E7H
MOV   R4,A
LCALL FSTR
MOV   A,R1
MOV   R0,A
LCALL FPLN
DB 0F7H
DB  0A8H,70H
DB  7AH,0C6H
DB  70H,0F9H
DB  0C5H,68H
DB  0FEH
DB  0A5H
DB  41H,0FAH
DB  26H
DB 0A0H,01
DB  80H,0EH
DB  0FBH
DB  00
DB  1CH
DB  40H
MOV   A,@R1
MOV   C,3BH
MOV   0E7H,C
MOV   @R1,A
POP   ACC
MOV   R0,A
RET
MOV   A,R1
PUSH  ACC
IMUL: MOV   A,R2
MOV   C,0E7H
MOV   0D5H,C
MOV   A,R5
MOV   C,0E7H
ORL   C,0D5H
MOV   0D5H,C
MOV   A,R3
MOV   B,R6
MUL   AB
MOV   R4,A
MOV   R7,B
MOV   A,R2
CLR   0E7H
MOV   B,A
MOV   A,R6
MUL   AB
ADD   A,R7
MOV   R7,A
MOV   A,R5
CLR   0E7H
MOV   B,R3
MUL   AB
ADD   A,R7
MOV   C,0D5H
MOV   0E7H,C
MOV   R2,A
MOV   A,R4
MOV   R3,A
RET
DSIN: MOV   A,R4
PUSH  ACC
MOV   R2,A
MOV   A,R5
PUSH  ACC
MOV   R3,A
LCALL DMUL
MOV   R4,A
MOV   A,R3
MOV   R5,A
MOV   R2,#12H
MOV   R3,#65H
LCALL DMUL
MOV   A,#64H
CLR   C
SUBB  A,R3
MOV   R3,A
MOV   A,#0A4H
SUBB  A,R2
MOV   R2,A
LCALL DMUL
MOV   A,#03H
CLR   C
SUBB  A,R3
MOV   R3,A
MOV   A,#92H
SUBB  A,R2
MOV   R2,A
POP   ACC
MOV   R5,A
POP   ACC
MOV   R4,A
LCALL DMUL
MOV   A,R3
ADD   A,R5
MOV   R3,A
MOV   A,R2
ADDC  A,R4
MOV   R2,A
JNC   DSN1
MOV   R2,#0FFH
MOV   R3,#0FFH
DSN1: RET
FEXP: MOV   @R1,#01H
INC   R1
MOV   @R1,#0B8H
INC   R1
MOV   @R1,#0ABH
DEC   R1
DEC   R1
LCALL FMUL
LCALL FSTR
MOV   C,38H
MOV   3BH,C
MOV   A,R4
CLR   0E7H
MOV   R4,A
JNB   0E6H,EXP1
MOV   R2,#00H
SJMP  EXP2
EXP1: CJNE  R4,#07H,EXP3
EXP3: JC    EXP4
SETB  0D5H
RET
EXP5: CLR   C
MOV   A,R2
RRC   A
MOV   R2,A
MOV  A,R3
RRC   A
MOV   R3,A
INC   R4
EXP4: CJNE  R4,#08H,EXP5
EXP2: MOV   A,R0
PUSH  ACC
INC   SP
MOV   A,SP
INC   SP
INC   SP
XCH   A,R1
MOV   R0,A
MOV   A,R2
PUSH  ACC
MOV   R3,#00H
MOV   R6,#08H
SETB  C
CLR   0D5H
LCALL FSDT
MOV   A,R6
MOV   C,3BH
MOV   0E7H,C
MOV   R4,A
LCALL FSTR
LCALL FSUB
LCALL FSTR
MOV   A,R0
XCH   A,R1
MOV   R0,A
LCALL FPLN
DB   77H,0B1H
DB  0C9H
DB 7AH,0A1H
DB  68H
DB 7CH,0E3H
DB  4FH
DB  7EH,0F5H
DB  0E7H
DB  00
DB  0B1H,72H
DB  01,80H
DB   00
DB     40H
POP ACC
JNB   3BH,EXP6
CPL   A
INC   A
EXP6: ADD   A,@R1
CLR  0E7H
MOV   @R1,A
DEC   R0
MOV   SP,R0
POP   ACC
MOV   R0,A
RET
FLNX: CLR   0D5H
MOV   A,@R0
JNB   0E7H,FLX1
SETB  0D5H
FLX2: RET
FLX1: LCALL NORM
JB    0D5H,FLX2
MOV   A,R0
PUSH  ACC
MOV   A,@R0
PUSH  ACC
CLR   A
PUSH  ACC
INC  R0
MOV   A,@R0
MOV   R2,A
INC   R0
MOV   A,@R0
MOV   R0,SP
CLR   C
RLC   A
XCH   A,R2
RLC   A
PUSH  ACC
MOV   A,R2
PUSH  ACC
LCALL FPLN
DB 7BH,0F4H
DB 30H,0FEH,85H
DB 13H
DB 7FH,91H
DB 51H,0FFH
DB 0FAH
DB 0BAH,00,0FFH
DB 0CAH
DB 7BH,00
DB 18H
DB 40H
DEC   R0
MOV   A,@R0
DEC   A
JZ    FLX3
MOV   C,0E6H
MOV   3BH,C
MOV   0E7H,C
JNC   FLX4
CPL   A
INC   A
FLX4: MOV   R5,A
MOV   B,#72H
MUL   AB
XCH   A,R5
MOV   R3,B
MOV   B,#0B1H
MUL   AB
ADD   A,R3
MOV   R3,A
CLR   A
ADDC  A,B
MOV   R2,A
MOV   R4,#08H
MOV   A,R2
FLX6: JB    0E7H,FLX5
MOV   A,R5
RLC   A
MOV   R5,A
MOV   A,R3
RLC   A
MOV   R3,A
MOV   A,R2
RLC   A
MOV   R2,A
DEC   R4
SJMP  FLX6
FLX5: MOV   A,R4
MOV   C,3BH
MOV   0E7H,C
MOV   R4,A
MOV   A,R0
XCH   A,R1
MOV   R0,A
LCALL FSTR
MOV   A,R0
XCH   A,R1
MOV   R0,A
LCALL FADD
LCALL FSTR
FLX3: DEC   R0
MOV   SP,R0
POP   ACC
MOV   R0,A
RET
NORM: MOV   A,@R0
MOV   C,0E7H
MOV   0D5H,C
INC   R0
MOV   C,0E6H
MOV   0E7H,C
MOV   R2,A
MOV   A,@R0
INC   R0
JNZ   NOM1
MOV   A,@R0
JNZ   NOM2
DEC   R0
DEC   R0
MOV   A,#45H
NOM4: MOV   C,0D5H
MOV   0E7H,C
MOV   @R0,A
RET
NOM1: JB    0E7H,NOM3
NOM2: CLR   C
MOV   A,@R0
RLC   A
MOV   @R0,A
DEC   R0
MOV   A,@R0
RLC   A
MOV   @R0,A
INC   R0
DEC   R2
CJNE  R2,#0C0H,NOM1
NOM3: DEC   R0
DEC   R0
MOV   A,R2
SJMP  NOM4
FATN: CLR   3BH
MOV   A,R0
PUSH  ACC
MOV   A,@R0
MOV   C,0E7H
MOV   3DH,C
CLR   0E7H
PUSH  ACC
INC   R0
MOV   A,@R0
PUSH  ACC
INC   R0
MOV   A,@R0
PUSH ACC
MOV   R0,SP
DEC   R0
DEC   R0
MOV   A,@R0
DEC   A
JB    0E6H,FAT1
MOV   A,R0
XCH   A,R1
MOV   R0,A
MOV   @R0,#01H
INC   R0
MOV   @R0,#80H
INC   R0
MOV   @R0,#00H
DEC   R0
DEC   R0
LCALL FDIV
LCALL FSTR
SETB  3BH
MOV   A,R0
XCH   A,R1
MOV   R0,A
FAT1: LCALL FPLN
DB 82H,0CCH
DB 0A0H,05
DB 80H,38H
DB  85H,0D4H,0F4H
DB  01,0D0H
DB  16H
DB  06H
DB  0E4H
DB  0A7H,77H
DB  0EFH
DB  0C9H
DB  40H
JNB 3BH,FAT2
MOV @R0,#07H
INC   R0
MOV   @R0,#0B4H
INC   R0
MOV   @R0,#00H
DEC   R0
DEC   R0
LCALL FSUB
LCALL FSTR
FAT2: MOV   A,@R1
MOV   C,3DH
MOV   0E7H,C
MOV   @R1,A
DEC   R0
MOV   SP,R0
POP   ACC
MOV   R0,A
RET
END

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