Instruction manual

Hardware Updates
1-6 AlphaServer 1000/1000A Supplement
Environment Variables
Three new environment variables for modems used with serial ports
COM1 and COM2 have been added. Use the SRM console commands,
set and show
,
to set and examine these variables. Use the init
command to put the new settings into effect after using the set
command. The new environment variables are shown in Table 1-2.
Table 1-1 Environment Variables
Variable Function
com1_baud,
com2_baud
Sets the baud rate of the COM1 or COM2 port. The default
baud rate is 9600.
com1_flow,
com2_flow
The com1_flow and com2_flow environment variables
indicate the flow control on the serial ports. Defined values
are:
NONE—No flow control
SOFTWARE—Use XON/XOFF (default value)
HARDWARE—Use modem signals CTS/RTS.
BOTH—Use SOFTWARE and HARDWARE
com1_modem,
com2_modem
The com1_modem and com2_modem environment variables
are used by the operating system to determine if a modem is
present:
ON—Modem is present
OFF—Modem is not present (default value)
No Onboard Video Controller
The latest system board revision does not contain the onboard CIRRUS
VGA controller.
The AlphaServer 1000/1000A configuration file provided in release 1.10
of the EISA Configuration Utility (ECU) provides a default setting of
DISABLED for the CIRRUS VGA controller. If you run ECU version
1.10 on a system that contains and uses the onboard VGA, you may have
to manually set the controller to ENABLED while running the ECU.