Homework Answers
The program that adds the data stored at 0x10..0x12 and 0x13. . . 0x15, respectively, and stores the sum at 0x20...0x22 is as follows :
**********************************************************************************************************************************************
#include<p18F8720.inc>
org 0x00
goto start
org 0x08
retfie
org 0x18
retfie
start movf 0x10,W,A ;copy the
value of location at 0x10 to WREG
addwf 0x13,W,A ;add and leave the sum in
WREG
movwf 0x20,A ;save the
sum at memory location 0x20
movf 0x11,W,A ;copy the value of location
at 0x11 to WREG
addwfc 0x14,W,A ;add with carry and leave
the sum in WREG
movwf 0x21,A ;save the
sum at memory location 0x21
movf 0x12,W,A ;copy the value of location
at 0x12 to WREG
addwfc 0x15,W,A ;add with carry and leave
the sum in WREG
movwf 0x22,A ;save the
sum at memory location 0x22
end
**********************************************************************************************************************************************
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