x86 assembler. Keyboard input from a string, first showed it again and then as one of the lowercase letters converted to uppercase show, and then one of the uppercase letters converted to lowercase display, the last of which shows the exchange of upper and lower case letters. Show string function calls the use of macros, uppercase conversion, lowercase conversion and exchange of written subroutines case.

ex7
...\ex7_1.asm
...\ex7_2.asm
...\ex7_3.asm
...\ex7_4.asm
...\MASM 6.11.zip
...\subp2.asm
...\subp3.asm
...\subp41.asm
...\subp42.asm
...\subp43.asm

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