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Program to find the 2's complement of a number

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Statement: Find the 2's complement of the number stored at memory location 2000H and store the complemented number at memory location 2001H.

Example:

(2000H) = 34H
(2001H) = CBH + 01H = CCH

Program:

LDA 2000H                   ; Obtain the number from location 2000H
CMA                              ; Complement the number
ADI 01H                        ; Add one to the complemented number
STA 2001H                    ; Store the result at location 2001H
HLT                                ; Terminate program execution
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