Service manual
3-2 Sun Ultra 2 Series Service Manual • July 1996
level switch determines the POST function. The following table lists the diag-level
switch settings for disabling POST (off), enabling POST Maximum (max), or
enabling POST Minimum (min).
3.2 Pre-POST Preparation
Pre-POST preparation includes:
■ Setting up a tip connection to another workstation or terminal to view POST
progress and error messages. See Section 3.2.1 “Setting Up a Tip Connection” on
page 3-2.
■ Verifying baud rates between a workstation and a monitor or a workstation and a
terminal. See Section 3.2.2 “Verifying the Baud Rate” on page 3-4.
If a terminal or a monitor is not connected to serial port B (default port) of a
workstation or server to be tested, the keyboard LEDs are used to determine error
conditions. See Section 3.8 “System and Keyboard LEDs” on page 3-15.
3.2.1 Setting Up a Tip Connection
Using a tip connection enables a remote shell window to be used as a terminal to
display test data of a system being tested. Serial port A or serial port B of a tested
system unit is used to establish the tip connection between the system unit being
tested and another Sun workstation monitor or TTY-type terminal. The tip
connection is used in a SunOS™ window and provides features to help with the
OBP.
To set up a tip connection:
TABLE 3-1 diag-level switch? and diag-level Flag Settings
diag-level Setting diag-switch? Setting POST Initialization Serial Port A Output
Off N/A No Disabled
N/A False No Disabled
Max True Yes (power-on) Enabled
Min True Yes (power-on) Enabled