Previously, only manual creation of the device file with mknod permitted the administrator to turn on buffering. The driver major numbers have now changed for the Series 800 Business Servers and serial drivers now have a major number of 1 as for the Series 700s. The drivers for the systems have been modified to take advantage of multiprocessor systems. The changes for SAM include the previously mentioned security features. The only other significant change is in the default gettydefs entry for direct connect ports.
Modems still default to that value.
At 9.X, when SAM created the cua device file for Series 700s, it was made a callout type device. For Series 800s, it was made a hardwired one. Now both are consistent. While this was available at later 9.X releases of the Series 700s, this feature is new for the Series 800. Summary Numerous minor datacomm features make 10.X a big improvement over 9.X HP-UX for serial data communications.