DECnet usage.
In case DECnet is used it is important
to understand that a DECnet address change forces a change of the MAC-address
of your Ethernet adapter. On an Alpha computer OpenVMS takes care of this
immediately, but in the case of the Alpha Emulator this task is performed by
the operating system of the host platform. This creates a difference between
the Alpha operating system expectations and the actual situation.
Therefore a reboot of the emulator is required after a DECnet address
change has been applied. If you do not reboot unpredictable problems can
occur.
Configuring a VT-terminal
emulator
Mentioned products may not reside on your standard Windows system, please
check and install before trying to invoke them in the Alpha Emulator setup.
To use Hyperterm (comes standard with Windows)
#OPA0.type="telnet"
#OPA0.port=":20003"
#OPA0.command='"C:\Program Files\Windows NT\hypertrm.exe"/t
localhost :20003'
To use Powerterm (with default
Setup=VT100, Auto Connect, TELNET localhost :10000)
OPA0.type = "telnet"
OPA0.port = ":10000"
OPA0.command = "C:\PTW525\PT525.EXE"
Configuring a different VT-terminal emulator
You may prefer to use another terminal emulator than the one that is
standard incorporated in the installation process of the emulator. here you
find configuration instructions for a series of VT-emulators that can be
used:
To use Hyperterm (comes standard with Windows)
- Open HyperTerm: Start / All Programs / Accessories /
Communications / Hyper Terminal
- Enter name of the connection (e.g. alpha) in
<Name>
- Select <TCP/IP (Winsock)> from the <Connect
using> pull down menu
- Enter <localhost> or host name (TCP/IP address)
in <Host address>
- Enter port number in <Port number> (equal to
TCP/IP port number you have specified in the Alpha Emulator
Configuration File
- Click <OK>, ignore the message that follows and
click <OK> again
- Select <Properties> from the <File> menu
and select the <Settings> tab
- Set <Backspace key sends> to <Del> and
<Emulation> to VT100, then click <OK>
- Click <Save As..> and select the directory you
want to save these settings into
To use KEA!
- Open KEA!: Start / All Programs / KEA! VT/ KEA!
- Select VMS and click <Next>
- Select <Telnet> and click <Next>
- Enter <localhost> or host name (TCP/IP address)
in <Host name or Ip address>
- Enter the port number you specified in the Alpha Emulator
Configuration File into the <Telnet port> box
- Click <Advanced> and set <Pair carriage
return CR with> to <null (NUL)>
- Click the <Next> button
- Set <VT100> as terminal type and click
<Next>
- Select <FTP> as file transfer ptotocol and
click <Next>
- Click <Finish>
- Click <Save Session as..> and select the
directory you want to save these settings into
To use Powerterm
- Open Powerterm: Start / All Programs / Pathworks
Powerterm 525 / Powerterm
- Select <Telnet> in <Session type>
- Enter <localhost> or host name (TCP/IP address)
in <Host Name>
- Enter the port number you specified in the Alpha
Emulator Configuration File into the <Port Number> box.
- Save session in <save Terminal setup> from the
<File> menu item
To use Reflection
- Start Reflection: Start / All Programs / Reflection /
Host UNIX & Digital
- Enter <localhost> or host name (TCP/IP address)
in <Connection> <Connection Setup>
- Select <More Settings> and enter the port
number you specified in the Alpha Emulator Configuration File into the
<TCP Port> box.
- Enter <VT100> in <Terminal type>
- Select <OK>
- Select <Setup> <Terminal setup>
- Enter desired terminal (VT102) in <Terminal
type>
- Enter desired terminal (VT102) in <Emulation>
<Terminal ID>
- Enter <OK>
- Save session in <File> <Save Settings>
Setting up a Virtual Network inside the Emulator
Host system
This section describes how to create an Ethernet connection within 1
computer system without using physical Ethernet adapters. This capability is
useful when you want to setup a network link between two software entities
within 1 computer (but it is only effective on Windows XP and Windows 2003).
For example when linking an X-Windows emulator with the Alpha Emulator.

Host connection without using a physical network card
Instead of using 2 NIC's to create a connection between VMS and the host
system you can install 2 Microsoft loopback adapters and bridge these
together:
- Install the Microsoft Loopback Adapters
- Go to ‘Start” / “Control Panel” / “Add Hardware”.
- In the introductory dialog box, click “Next”.
- Select “Yes, I Have Already Connected the Hardware”,
and click “Next”.
- Scroll to the bottom of the Installed Hardware list
box, select “Add a New Hardware Device”, and click “Next.
- Select the “Install The Hardware That I Manually
Select From A List (Advanced)” option and click “Next”.
- Under “Hardware Types”, select “Network Adapters”,
and click “Next”.
- Under “Manufacturer”, select “Microsoft”.
- Under Network Adapter, select Microsoft Loopback
Adapter.
- Click Next twice, and click Finish.
- Set up the Bridge connections
- Open Network Connections (Go to “Start” / “Settings”
/ “Network Connections”).
- Under “LAN or High-Speed Internet”, hold down the
CTRL key, and then click 2 adapters to include in the bridge (one of
them should be Loopback adapter, the 2nd adapter can be removed from the
bridge after it has been created).
- Right-click one of the connections that you have
selected, and then click “Bridge Connections”.
If you do not see the Bridge Connection option, it’s means what network
bridging is disabled in the Administrative Templates in Group Policy.
So, open the Group Policy Management, then select "Small Business
server client computer", and disabled the policy "Prohibit
installation and configuration of Network Bridge on your DNS domain
network".
- Configure the Bridge
- Configure the IP address of the Mac Bridge and set it
up with a different IP and subnet than your physical network card. E.g.
192.168.2.100 (setup VMS with something like 192.168.2.x).
Configure the configfile
- Configure in the configuration file "MAC Bridge
Miniport" as network adapter and add the parameter mapping mode
with "shared"
- In the configuration file this will look like this :
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EWA0.iface="MAC
Bridge Miniport"
EWA0.mapping_mode="shared"
EWA0.macaddr="00-04-00-00-10-12" (just a mac address to start
with, you need to specify one)
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Test the system
- Install on the host computer X-Server product
(Exceed, eXcursion or something else) and start X-server application.
- Start the Alpha Emulator and load the OpenVMS
environment.
- In VMS configure the (dummy) Ethernet adapter with an
IP address in the same subnet as the Mac Bridge.
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Create/set DISPLAY
(in the example below the host computer IP address used):
SET DISPLAY/CREATE/TRANSPORT=TCPIP/NODE=192.168.2.100
Start TCP/IP (if not started automatically):
@SYS$STARTUP:TCPIP$STARTUP
Check that networking connection established properly:
UCX PING 192.168.2.100
Run any X-Windows application (should be visible on the host computer
screen):
RUN DECW$CLOCK
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