Tryng to programm 27C256 chip in proteus
The file name extension already gives it away: Your software expects the contents of the ROM in raw binary format. It just takes whatever you wrote in that &quot;bin&quot; file and dumps it right into the ROM without any kind of conversion. If you tell it to load a file containing text, you will get a ROM that contains text - and not the binary functions you wanted.
You will most likely have to create the file using a hex editor. The file should only be 16 bytes large (since 4 binary inputs can produce 16 different combinations).