Hi.......

If you can see your output hexfile with your favourite text editor something like these:

:0128340923480238472
:042094827501923482023
:0243823745ABCDEF
.....and so on

then you do have an intel-hex-formatted output/object file.

To get the binary (rom image) object file (in WIN9x/DOS) from your hex-file, you need a converter such as hexbin.exe, a utility which comes with ASEM-51 package by W.W. Heinz. Google Up!
It tells you how big the size of your rom code.

Selamat berjuang!