System Configuration and Setup 6-5
6.1.2 Selecting the Console and Display Device
The SRM os_type environment variable determines which user
interface (SRM or AlphaBIOS) is the final console loaded on a power-up
or reset. The SRM console environment variable determines to which
display device (VT-type terminal or VGA monitor) the console display is
sent.
Selecting the Console
The os_type variable selects the console. Os_type is factory configured as
follows:
•
For Windows NT, os_type is set to nt.
•
For UNIX or OpenVMS, os_type is set to unix or vms, respectively.
If os_type is set to unix or vms, the SRM console is loaded on a power-up or
reset. If os_type is set to nt, the SRM console is loaded and then SRM starts
the AlphaBIOS console from system flash ROM.
Selecting the Display Device
The console terminal that displays the SRM user interface can be either a serial
terminal (VT320 or higher, or equivalent) or a VGA monitor. A VGA monitor is
required to run Windows NT.
The SRM console environment variable determines the display device.
•
If console is set to serial, and a VT-type device is connected, the SRM
console powers on in serial mode and sends power-up information to the VT
device. The VT device can be connected to the MMJ port or to COM2.
•
If console is set to graphics, the SRM console expects to find a VGA card
connected to PCI 0 and, if so, displays power-up information on the VGA
monitor after VGA initialization has been completed.
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