> Anyone have any luck getting it working with a USB PowerMac ?
> I have a G4 so no serial just USB. I'm using VPC 3.03 with Windows 98
> and a Keyspan USB to Serial adapter. No luck, it says Com port open
> but pronto not responding

While I can't answer your questions specifically, I can offer some places to look that might help you figure out the specific quirks of your Keyspan/G4 combo.

Do a keyword search on the following web sites:

MacFixIt web site http://www.macfixit
Accelerate Your Mac! http://www.xlr8yourmac.com
MacInTouch site http://www.macintouch

One of those sites will most likely give you a definitive answer and/or workaround, not addressing the Pronto specifically, but with using other serial devices with your specific hardware combo.