VTech Alphabert s Magic Readport User Manual download pdf (Page 13)

BM Dept., Govt. Engg. College, Gandhinagar Page 13

EXPERIMENT NO. 3

AIM: Write programs to ….

• To add two sixteen bit numbers stored in DPTR and at memory location 40h,41h.Store

result in DPTR.

• Multiply two 16 bit numbers. Assume that first 16 bit number is stored in register R6 and

R7, Second 16 bit number is stored in register R4 and R5. Store answer in register

R0,R1,R2 and R3.Load first value in R6 and R7

Program 1: To add two sixteen bit numbers stored in DPTR and at memory location 40h,

41h. Store result in DPTR.

ORG 00h

MOV DPTR,#2233h ;Transfer 16 bit data to DPTR

MOV 40h,#11h ;Transfer LSB of 16 bit data to location 40h

MOV 41h,#22h ;Transfer MSB of 16 bit data to location 41h

MOV A,40h ; Get LSB of 16 bit data in accumulator

ADD A,DPL ;Add with LSB of second data which is stored in

;DPTR

MOV DPL,A ;Save result back in DPL

MOV A,41h ;Get MSB of first data in accumulator

ADC A,DPH ;Add with MSB of second data consider previous

;carry.

MOV A,DPH ;Save result back in DPH

END

Program 2:

;Load first 16 bit value in R6 and R7

MOV R6,#11h

MOV R7,#22h

;Load second 16 bit value in R4 and R5

MOV R4,#11h

MOV R5,#22h

;Multiply R5 by R7

MOV A,R5 ;Move the R5 into the Accumulator

MOV B,R7 ;Move R7 into B

MUL AB ;Multiply the two values

MOV R2,B ;Move B (the high-byte) into R2

MOV R3,A ;Move A (the low-byte) into R3

;Multiply R5 by R6

MOV A,R5 ;Move R5 back into the Accumulator

MOV B,R6 ;Move R6 into B

MUL AB ;Multiply the two values

ADD A,R2 ;Add the low-byte into the value already in R2

MOV R2,A ;Move the resulting value back into R2

MOV A,B ;Move the high-byte into the accumulator

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 79 80

Comments to this Manuals

No comments

VTech Alphabert s Magic Readport User Manual Page 13

Comments to this Manuals

Related products and manuals for Toys & accessories VTech Alphabert s Magic Readport