8085 Program: Convert Block to 1's Complement | D200H to D300H | HSC Board CS-II 2026

Master memory block manipulation in 8085! 💻 In this tutorial, we solve a popular board exam problem: Converting a block of fifteen memory locations into their 1's Complement.
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The Program Task:

Source Block: 15 bytes starting from D200H.

Operation: Convert each byte into its 1's complement (invert all bits).

Destination Block: Store the results starting from D300H.
The Logic:
How do we find the 1's complement in 8085? We use the CMA (Complement Accumulator) instruction. I will show you how to set up two pointers (HL for source and DE for destination) and a counter to process the entire block of fifteen (0FH) bytes accurately.
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Видео 8085 Program: Convert Block to 1's Complement | D200H to D300H | HSC Board CS-II 2026 канала Edu 4 Maharashtra