V22.0201 (sec. 1) - Computer Systems Organization (Honors)

Assignment 1

Write an 8086 assembly language program which modifies the (10-byte) character string in bytes 500H to 509H as follows: all capital letters should be changed to the corresponding lower-case letter; all digits should be changed to an asterisk (*); all other characters should be left unchanged.

Write two versions of the program:  one version which uses indexing, and a second version which does not use indexing (it does instruction modification instead).  Be sure to include comments in your program, and in particular include a line with your name and which version this is.

This assignment is due on September 29th. There is a penalty of 1/2 point (out of a total of 8 points) for each day late.

Email your assignment (the listing files produced by the Dewar assembler) to the e-tutor/grader, Michael Kim, mtk218@nyu.edu. Include your name and "Asgn 1" in the subject line.