Reduce size of hex file to fit into on chip memory

Hex files are in a text format: you can read them with any editor like Windows Notepad. Each couple of bytes in the files, encodes one single byte in memory.

Then, your 240kB hex files describes a maximum of 120kB of memory bytes. But since every line of hex file also contains information about memory address, line length and check sum, I think you'll get exactly 100kb.

Go here for detailed information:

http://en.wikipedia.org/wiki/intel_hex