Maverickmax,
Its becoming a habit
When I wanted to test out my MIDI controller (basically a UART) I used 'hyperterimal'
once set to the correct baud, its doesn't show you the wave form, but it does display what the packet is in ASCII. After all, it was designed for text. There are some progs on the net (free ones) that are similar but display HEX and binary, and sometimes decimal.
Also, search the board for 'soundcard oscilloscope'. Its a free bit of software that displays signals you put into the 'line in' on your sound card. All you need is a voltage divider 5:1 to get 5v to 1v. Since Line in is generally 1v p-p.