The firmware and VMS commands written to the Avanti log file support OpenVMS 7.1 and higher without modification.  OpenVMS 7.1 and higher uses the SYS$SYSTEM:SYS$USER_CONFIG.DAT to define ISA devices.

1.Per the commands provided, add the following lines to SYS$SYSTEM:SYS$USER_CONFIG.DAT to enable serial card recognition by VMS.  If the SYS$SYSTEM:SYS$USER_CONFIG.DAT does not exist, create it.

device = "Digiboard Serial Port"
 name = TX
 driver = SYS$YSDRIVER
 adapter = ISA
 id = DIGI
end_device

2.Reboot VMS.

3.After the reboot is complete, a TXA0 device will be present, which corresponds to serial0 on the Digiboard card.  TXA1 thru TXA4 can be added using the SYSMAN IO CONNECT command.  Place the following commands into a VMS startup file such as SYS$MANAGER:SYSTARTUP_VMS.COM:

$! Set up system serial ports.
$!
$ MCR SYSMAN
IO CONNECT /VECTOR=60 /DRIVER=SYS$YSDRIVER TXA1:
IO CONNECT /VECTOR=60 /DRIVER=SYS$YSDRIVER TXA2:
IO CONNECT /VECTOR=60 /DRIVER=SYS$YSDRIVER TXA3:
IO CONNECT /VECTOR=60 /DRIVER=SYS$YSDRIVER TXA4:
EXIT
$!

 

Similar commands are required to define TXB0 thru TXB4, TXC0 thru TXC4, TXD0 thru TXD4, and TXE0 thru TXE4.  If additional serial cards are defined, the appropriate commands will be written to the emulator log file.

With the firmware and VMS configuration changes completed, the additional serial ports are available for use.

Note:Errors in SYS$USER_CONFIG.DAT or in the SYSMAN commands could crash OpenVMS. Be very careful in applying these settings. If VMS will not boot after modifying SYS$USER_CONFIG.DAT, use a conversational boot with STARTUP_P1 set to "MIN" to regain access to the system and remove the offending SYS$USER_CONFIG.DAT file.