How would you find the size of a given file without opening it up? I'm trying to find the size of the .exe file that is being run so that I can reallocate memory (can't just do size from .asm file because it's two .asm's linked together... or is there a way to do that?). Thanks.
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Finding File Size
- Thread starter storm1899
- Start date
earthandfire
Programmer
Int 21h Function 4eh (Find First function).
Offsets 1ah (low word) and 1ch (high word) of the returned DTA have the file size
Use function 2fh to get the address of the DTA into ES:BX
Hope this helps
Offsets 1ah (low word) and 1ch (high word) of the returned DTA have the file size
Use function 2fh to get the address of the DTA into ES:BX
Hope this helps
lionelhill
Technical User
but remember that
(1) the size of an exe file
(2) the amount of memory filled by that file when loaded as an executable ready to be run, and
(3) the amount of memory the exe file asked to be allocated to its program on loading
are three potentially very different things.
(1) the size of an exe file
(2) the amount of memory filled by that file when loaded as an executable ready to be run, and
(3) the amount of memory the exe file asked to be allocated to its program on loading
are three potentially very different things.
TessaBonting
Technical User
Or try this:
define a segment some where in your source:
ZZZZZZZZ segment public "TEXT"
ZZZZZZZZ ends
you don't have to put any info into it.
Then the most linkers will put this segment
as the last one in your exe file.
So that the following will tell you the real amount
of memory the running exe takes.
Main .startup
mov Temp,es
mov ax,seg ZZZZZZZZ
sub ax,Temp
....
AX now contains the size in paragraphs (16 bytes).
Just afther starting the program es contains the
starting segment of the program
succes,
Tessa
define a segment some where in your source:
ZZZZZZZZ segment public "TEXT"
ZZZZZZZZ ends
you don't have to put any info into it.
Then the most linkers will put this segment
as the last one in your exe file.
So that the following will tell you the real amount
of memory the running exe takes.
Main .startup
mov Temp,es
mov ax,seg ZZZZZZZZ
sub ax,Temp
....
AX now contains the size in paragraphs (16 bytes).
Just afther starting the program es contains the
starting segment of the program
succes,
Tessa
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