Hi folks! Is anyone experienced in MS DOS?

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I've been struggling with the following prompt for hours:
In MS DOS, Write an assembly language program that will accept a single character from the keyboard, and then output the next character in the ASCII sequence. For example, if the character 'A' is entered, the character 'B' will be typed out.

What I have tried:

I don't really know how to add to the input value. Any advice would be greatly appreciated!

INCLUDE Irvine32.inc
.data
msg1 db "Enter a key ",0
msg2 db "You typed in ",0
.code
main PROC

mov edx, OFFSET msg1
call WriteString
call ReadChar


mov edx, OFFSET msg2
call WriteString
call WriteChar 

exit
main ENDP
END main

Posted 18-Feb-18 6:53am

Member 13684076

Updated 10-May-21 23:33pm

RickZeeland

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Comments

Patrice T 18-Feb-18 13:02pm

What have you done so far?

Member 13684076 18-Feb-18 13:10pm

I have a program that accepts one input value and outputs that same value.

Patrice T 18-Feb-18 13:18pm

Show your code.

Member 13684076 18-Feb-18 13:29pm

INCLUDE Irvine32.inc
.data
msg1 db "Enter a key ",0
msg2 db "You typed in ",0
.code
main PROC

mov edx, OFFSET msg1
call WriteString
call ReadChar

mov edx, OFFSET msg2
call WriteString
call WriteChar

exit
main ENDP
END main

Patrice T 18-Feb-18 13:39pm

Use Improve question to update your question.
So that everyone can pay attention to this information.

Member 13684076 18-Feb-18 14:04pm

Thanks!!!

Richard MacCutchan 18-Feb-18 14:17pm

After you call ReadChar you need to save the character so that you can write out the updated value.

Member 13684076 21-Feb-18 21:46pm

That does help. Thank you! :)

Member 13684076 21-Feb-18 21:45pm

Thank you for the great advice!

CHill60 18-Feb-18 16:04pm

You also need to understand that MS-DOS is an (old) operating system and "assembler" is any one of several "programming languages" that target an operating system. You can't write anything "in" MS-DOS

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2018-02-18T07:12:00

Solution 1

In any computer language adding 1 to 'A' will produce 'B'. If you do not understand that basic concept then you need to get hold of an introductory book on computers.

Posted 18-Feb-18 7:12am

Richard MacCutchan

Hi folks! Is anyone experienced in MS DOS?

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Solution 1

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Hi folks! Is anyone experienced in MS DOS?

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Solution 1

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