Exar 16C850 utilities: Usage: 850util -i -> install driver 850util -r -> remove driver 850util -s -> start driver 850util -t -> stop driver 850util -ar base rxtrigger -> set rxtrigger registry setting 850util -at base txtrigger -> set txtrigger registry setting 850util -aa base auto485 -> set enable/disable auto485 registry setting 850util -d base -> delete port settings from registry 850util -ir base rxtrigger -> immediate set rx trigger 850util -it base txtrigger -> immediate set tx trigger 850util -ia base auto485 -> immediate enable/disable auto 485 Note that if you change the triggers via ir or it that it does not enable those trigger values until you call the -ia function. The correlary to this is that if you set the registry entries to specify the triggers on startup, you must also add the auto485 registry entry to activate those trigger levels. In fact it is probably a good idea to have all of the entries in the registry, for example if you have a single channel board that has its address switch set to 0x280 hex (positions 5 and 7 OFF and 1,2,3,4,6,8 ON the following sequence should setup the system to, on subsequent reboots initialze the card to take advantage of the 850 features. 850util -i (this installs the driver) 850util -ar 280 64 (this sets the receive trigger level to 64 bytes) 850util -at 280 64 (this sets the transmit trigger level to 64 bytes) 850util -aa 280 1 (this sets the card to use automatic RS-485 transmitter control) reboot the system here and the new settings will take effect.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.