A small USB techtool from Apple's Developer Tools, provided here in
popular versions for OS X and OS 9.

dL1 - USB Prober v2.5.0 (date 20060912) Universal Binary taken from OS
X 10.4.10 Developer Tools, works in at least OS 10.2.6 through 10.11.6
tested.

dL2 - a fuller USB Developer Kit for OS 9, which the kit contains USB
Prober v1.5.1f1 (date 20010312) will say v1.3 in its About box.

Compatibility
Architecture: PPC x86 (Intel:Mac)