186 Sun Fire 280R Server Owner’s Guide • January 2001
■/dev/ttyb is inaccessible.
Sometimes, a program will have changed the protectionof /dev/ttyb (or the serial
port you are using) so that it is no longer accessible. Make sure that /dev/ttyb has
the mode set to crw-rw-rw-.
■The serial line is in tandem mode.
If the tip connection is in tandem mode, the operating system sometimes sends
XON (^S) characters (particularly when programs in other windows are generating
lots of output). The XON characters are detected by the Forth word key?, and can
cause confusion. The solution is to turn off tandem mode with the ~s !tandem
tip command.
■The .cshrc file generates text.
The tip connection opens a sub-shell to run cat, thus causing text to be attached to
the beginning of your loaded file. If you use dl and see any unexpected output,
check your .cshrc file.
How to Configure a Local Graphics Console
●For information about how to configurea local graphics console, see “How to
Configurea Local Graphics Console” on page 36.
How to Set the Diagnostics Level

Before YouBegin

Make sure that the power to the system is on and the keyswitch is in the Power-
On/Off position. Access your server’s system console either through a remotely
connected workstation or by an alphanumeric terminal or graphics console
connected to the server’s serial port. See:
■“How to Attach an Alphanumeric (ASCII) Terminal”on page 34
■“How to Configure a Local Graphics Console” on page36
■“How to Set Up a tip Connection” on page 183
For background information about the available levels of testing, see:
■“About Diagnostic Levels” on page167