Hi I have a Furuno GP32 on a boat I have bought a new lap top with no serial ports I want to run cmap. Actually it works ok but only for a while,30 seconds to 4 hours!! With out opening the cmap I can see on the hyperterminal the nmea stop. The page stay but the info just stops. The only way to re-start is to disconnect and reconnect the usb then close and re-open the hyperterminal, the screen will fill up and away it goes again--- for a while!!
Any help would be appreciated

I'm not sure I fully understand your setup from your description.
What is cmap?
Are you using a USB to serial adapter?

Kenneth

Hi , Well cmap is the marine system that has every chart in the world accessable. When connected to a gps it will put your position on the chart and up dates that position constantly. Yes I have a BAFO 810 USB serial adapter, I have updated drivers from the internet. What do you ya think???

Ok...well some googling turned up a few things.
First, the Furuno units appear to not do a fully compliant NMEA exchange.
I'd make sure c-map works with your model Furuno.

But you said it stops transmitting even if cmap isn't running, so that doesn't sould like an incombatibility issue with the software.

I'd look at a few things.
First, depending on your laptop software, you should check the serial port setup.
Check the flow control setting. Try Hardware, Software (xon/xoff), and none.
You might also want to want to disable Windows auto-detecting whether it thinks there is a serial mouse on the port.
WAIT...scratch all that since you don't have a serial port.
Or does hyperterm think it is a serial port? I've never tried USB->serial.
If hyperterm thinks it is a serial port, then I'd check the things I mention above.

I'm not sure how much we can help with marine type issues.
There are a few boaters here, but I don't know if they have marine type GPSr systems or just use their handhelds.
Trailerman is/has left for a trip around the loop.

Maybe some folks in these forums can help you:
boating-forum
c-map forum

Kenneth