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Manually Assemble

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Write and manually assemble the following programs. All memory addresses include the starting and ending addresses. Show comments and identified source codes.

1. Clear (place 0s) in all memory locations from 2000h to 200Ah.
2. Make every odd bit in memory addresses C000h and D000h a 0. Do not change any other bit at each address.

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Solution Summary

The solution writes and manually assembles the following programs.

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The response is attached in MS WORD file named solution.doc.


Mem. Mnemonics comments
1000 MOV CX,000A(h) ; put total number of memory locations in CX

1002 MOV BX, 2000h ;put address of first memory location in BX

1004 MOV AX, DS:[BX] ; put contents of memory location specified by

1005 AND AX,0000h ; logically AND contents of memory location with
0000h i.e. clear memory location

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