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int 21h/ah=09h string output
Thread Solved |
im using fasm (flat assembler 1.68), and im trying to output a string with int21h/ah=09h
this code outputs "hello world", but it outputs some control characters before it ([SOME WEIRD CONTROL CHARACTERS]hello world)
so how can i fix this?
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this code outputs "hello world", but it outputs some control characters before it ([SOME WEIRD CONTROL CHARACTERS]hello world)
so how can i fix this?
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#2 17 Days Ago
Strange.
Presumably DOS, or you'd get nothing.
I notice the lack of a return statement. The control chars may appear at the beginning of the line, but that doesn't mean they were printed before your message. You might be running past the end of your program, and hitting something that moves the cursor, then prints who-knows-what.
Also, I don't see any segment setup, so this is a com program?
Presumably DOS, or you'd get nothing.
I notice the lack of a return statement. The control chars may appear at the beginning of the line, but that doesn't mean they were printed before your message. You might be running past the end of your program, and hitting something that moves the cursor, then prints who-knows-what.
Also, I don't see any segment setup, so this is a com program?
0
#3 17 Days Ago
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Originally Posted by dan63043 
Strange.
Presumably DOS, or you'd get nothing.
I notice the lack of a return statement. The control chars may appear at the beginning of the line, but that doesn't mean they were printed before your message. You might be running past the end of your program, and hitting something that moves the cursor, then prints who-knows-what.
Also, I don't see any segment setup, so this is a com program?
even if i put
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i still see control characters before my message
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#4 17 Days Ago
Hmmm... not a fasm user, so just some other observations. No org statement, or use 16 statement. Thought fasm syntax was a dollar symbol before hex numbers, but that may be optional. Some assemblers need exe2bin to fix linkage of programs. Maybe give us the whole program and the process you follow and it could attract a solution.
Actually, it's so short, a dir listing of executable (so we see file size) and use debug to dump the contents, and post it here.
Actually, it's so short, a dir listing of executable (so we see file size) and use debug to dump the contents, and post it here.
Last edited by dan63043; 17 Days Ago at 2:54 am. Reason: Add request for debug output
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#5 16 Days Ago
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Originally Posted by dan63043
Hmmm... not a fasm user, so just some other observations. No org statement, or use 16 statement. Thought fasm syntax was a dollar symbol before hex numbers, but that may be optional. Some assemblers need exe2bin to fix linkage of programs. Maybe give us the whole program and the process you follow and it could attract a solution.
Actually, it's so short, a dir listing of executable (so we see file size) and use debug to dump the contents, and post it here.
Assembly Syntax (Toggle Plain Text)
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#6 16 Days Ago
Ha! Isn't funny how we overlook the obvious? When you pointed DX at 0002, you forgot that your program actually loads at 0100. Just change
to
BTW, here's how to use debug to get a decent listing (ok, pathetic listing, but we're using "debug")
Assembly Syntax (Toggle Plain Text)
Assembly Syntax (Toggle Plain Text)
BTW, here's how to use debug to get a decent listing (ok, pathetic listing, but we're using "debug")
Assembly Syntax (Toggle Plain Text)
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