Write a program to send the following listed data stored at

Write a program to send the following listed data stored at memory locations $2100-$210F to a subroutine that adds them up. Store the result at memory location $21FF. Use \"md\" to see the result and include in your report. Data (numbers are in decimal): 10,15,34,4,5,6,9,23,38,2,11,14,15,9,7. using Assembly language for 68HC11 microcontroller. (using assembly language)

Solution

Assembly language program for 68HC11 microcontroller

ORG $2100
x_dat FCB 10   
FCB 15   
FCB 34
FCB 4
FCB 5   
FCB 6
FCB 9   
FCB 23
   FCB 38
   FCB 2
   FCB 11,14,15,9,7

ORG $2100 program starts here (location $2100)
CLRA clear acc A
LDX #x_dat X points to first number (immediate)
LDAA 0,X first number in acc A (indexed)
INX X points to next number
again ADDA 0,X add next number to acc A (indexed)
INX increment pointer
CPX $21FF
BNE again if not, add next number (relative)
STAA $21FF store acc A in $21FF (extended)

md 21FF

END

Thanks