Randomly, I just found a USB-Serial cable I thought I'd lost, and it turns out to be a PL2303. So all I need is some connectors, and I can test that. Might still be three weeks, since I'm travelling. On 17/03/2012, at 11:11 PM, Eric S. Raymond wrote: > Andrew McGregor : >> I probably can, but it might be three weeks or so given my schedule. > > Please do. > > I've been watching the market for USB GPS mice since 2005. The PL2303 > is about 80% likely to be the adapter in one of these chosen at random > (allowing for sales volume of GPS types). The FTDI SIO you tested is > the next most common type. After that, in really small percentages, > you get the Cypress M8/CY7C64013 and the Cygnal Integrated Products, > Inc. CP210x. > -- > Eric S. Raymond