OSDev.org

I am attempting to put the prompt letter into a local variable. The only problem is, I need to know HOW to DEFINE a variable and HOW to move a text value, like 'A>', into it using it in a mov statement. Every single possible combination of syntax and code that I could come up with doesn't work, so I'm hoping someone will atleast throw out an innertube so I won't drown in code in my sleep.

EDIT: reading over your previous topic, I've shaved some stuff off.

Write a callable function called, say, strcpy, that copies a null-terminated string byte-by-byte from a string pointed to by SI to an array of bytes (another string, hehe) in DI. Voila.

You can't move/copy strings with the MOV instruction.

You can use "movsX", "cmpsX" assembly command for string operations.

You don't need a string if the prompt is just one letter. Maybe you'd better show us your code and tell us what assembler you are using (the above example is in NASM syntax).

Ok. In order to add '>' I would just call a separate string, like ...assuming that [prompt_letter] doesn't do a char return and puts '>' on the next line, which it shouldn't.

In NASM syntax, "lea si, prompt_arrow" should be "lea si, [prompt_arrow]" or a plain "mov si, prompt_arrow". And "print_string" should be printing a character, not a string.

Again, you'd better show us your code and tell us what assembler you are using.