JoyMon, the Joystick Monitor for DOSBox is a tiny application that displays the Joystick axes and button behavior in a text screen, along with actual values. This works excellently to purpose in DOSBox, though it does not handle all the situations a real DOS computer would throw at it.
I needed a way to test joysticks and gamepads in DOSBox but I couldn't find a simple tool. The best I could find is the excellent JoyCalib from www.oldskool.org which tests a single joystick's two axis and two buttons with various options. I wanted to test a modern gamepad, with up to all 4 axes and 4 buttons as available in DOSBox .74 (latest version when JoyMon was written).
So I wrote this one.
Written in assembly and built using Borland Turbo Assembler 5.0 (TASM5), source code included.