East Coast USA

I was at the thrift shop today and stumbled upon one of these things for $1 complete with the accompanying mouse. It works fine with the exception of a few sometimes unresponsive keys. My aim in buying it is to do some light circuit bending (prolly just a pitch knob and an audio out) and use it to make music. One of the built in programs is a musical keyboard that allows you to play two octaves of the C major scale on the bottom two rows of the keyboard using the crappiest PCM instruments you've ever heard. It has the potential to sound really cool through some guitar pedals.
If anyone has any helpfull information on these computers or any ideas I'd greatly appreciate it