CODEWITHSUNDEEP
fileassemblyx86
geekybedouin
geekybedouin

Reputation: 559

Reading File Error.. Microsoft Assembly

I am workin on a pretty big program in Assembly

I have a bit of a problem in this specific piece of code

ToArray proc _FH:word ; _FH File Handler ;non-void function returns -1 if error 
LOCALS
push AX BX CX
MOV BX, _FH
MOV CX, 400
MOV DX, offset FileBuffer
MOV AH, 3FH
INT 21H
JC ErrorReading
call puts, offset Read_Success
JMP DONE
ErrorReading:
call puts, offset Read_Error
MOV DX,-1
DONE:
pop CX BX AX
ret
ToArray endp

I have { 1 2 5 6 } in the opened file but after callin INT 21H it just fills the array with 80241 80241..

Why is this happening :?

Upvotes: 0

Views: 76

Answers (1)

Michael
Michael

Reputation: 58427

from having 1 3 5 6 I have 8241 8243 8245...

That looks like correct data to me.
The decimal numbers 8241 8243 8245 when viewed as hexadecimal would be 0x2031 0x2033 0x2035. 0x20 is the ascii code for the space character, 0x31 is the ascii code for '1', and so on. So you're looking at the string "1 3 5 ". It's just that you picked a representation of the data that makes this hard to see.
Unless the file is using Unicode or some other multi-byte character encoding you're better off viewing the characters as bytes rather than words.

Upvotes: 2

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