VTech Alphabert s Magic Readport User Manual download pdf (Page 16)

Lab Manual of Microcontroller & Interfacing Page 16

B. Write assembly language program to add 4 digit BCD numbers. First 4 digit number

stored at 40h-41h (LSB at 41h), second 4 digit number stored at location 42h-43h

(LSB at 43h). Store result in DPTR and carry flag.

Memory

Location

HEX

code

Label Opcode Operands Comments

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 79 80

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VTech Alphabert s Magic Readport User Manual Page 16