Simple calculator for windows completely programmed in x86 assembly!
I have just found this little calculator I did a while back in my old backup folder. It is all written in x86 assembly and it uses plain Windows APIs to create and manage a window.
You need to have masm32 to build this (build script is included).
Math is limited to -65535 to +65535 because I used 16 bit division to perform number to string conversion but 32 bit registers are used everywhere else, that is why such an unconventional range :)