# FIFO Buffer Settings

If you are using a standard serial port connection (not a USB port with a USB to serial adapter) and the Run/Identify Test shows no Device Type, but a "Yes" in the Echo column, or a "Yes" in both the Loopback and Echo columns, like this:

...you may need to adjust the port's FIFO buffer setting.

- Make note of the COM port number in the row where it displays a "Yes" for Echo. (In this example it is COM5).
- Find that COM port in Device Manager.

Finding your Ports List in your computer's Device Manager

- Windows 2K : Start Menu > Settings > Control Panel > System > click Hardware Tab > Device Manager... > expand Ports (COM & LPT)
- Windows XP : Start Menu > right-click My Computer > Properties > click Hardware Tab > Device Manager > expand Ports (COM & LPT)
- Windows Vista or Windows 7 : Start Menu (Windows icon) > right-click Computer > Properties > Device Manager (left pane) > expand Ports (COM & LPT)

- Right-click on the COM port, and select Properties

- On the Port Settings tab, click the Advanced button.
- In the Advanced Settings window, un-check the "Use FIFO buffers" box, then click OK.

- Now try the Run/Identify Test again, or try downloading a program to your BASIC Stamp.
- If this didn't help, Contact Parallax Tech Support for assistance.

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BASIC Stamp Help Version 2.5.4

Copyright © Parallax Inc.

8/8/2012