At 03:24 PM 6/1/2009, Gordon JC Pearce wrote:
Okay, let's try again. I have a circa-70s 300-baud
modem, that will
generate incorrect tones when it's plugged into a USB-to-serial
converter, but not when it's plugged into a real serial port.
Why might this happen?
USB only guarantees to supply 100 milliamps. Up to 500 mA can be
negotiated with the controller, depending. Might your older device
depend on more amps than the USB adapter can supply?
- John