Version of VMS prior to V7.1 use the SYS$SPECIFIC:[SYSMGR]ISA_CONFIG.DAT to define ISA devices.  If the file does not already exist, it can be created from the SYS$COMMON[SYSMGR]:ISA_CONFIG.TEMPLATE.

1.The commands written to the Avanti log file are for VMS 7.1 and higher.  However, the information provided in these commands can be used to configure earlier versions of VMS.  Using the data written to the Avanti log file, adding the following lines to SYS$SPECIFIC:[SYSMGR]ISA_CONFIG.DAT will enable serial card recognition by OpenVMS 6.2.

[TXA0]
NAME=TX
DRIVER=SYS$YSDRIVER
IRQ=15                                                ß irq0
NODE=1                                                ß slot
PORT=(100:8,108:8,110:8,118:8,120:8,128:8)        ß iobase0..iobase5

2.If more than one Digiboard is defined in the configuration file, add similar sections for [TXB0], [TXC0], [TXD0] and [TXE0] as needed.  For these sections, replace the text highlighted in red with the data for that card obtained from the Avanti log file.

3.Once ISA_CONFIG.DAT has been updated, reboot VMS.

4.After the reboot is complete, a TXA0 device will be present that corresponds to serial0 on the Digiboard card.  If additional cards are defined, the first port on each of these will be present as well (TXB0, TXC0, TXD0, TXE0).  TXu1 thru TXu4 can be added using the SYSMAN IO CONNECT command.  For example, placing the following commands into a VMS startup file such as SYS$MANAGER:SYSTARTUP_VMS.COM will enable devices TXA1 – TXA4.

$! Define additional serial ports.
$!
$ MCR SYSMAN
IO CONNECT/NOADAP/DRIVER=SYS$YSDRIVER TXA1:
IO CONNECT/NOADAP/DRIVER=SYS$YSDRIVER TXA2:
IO CONNECT/NOADAP/DRIVER=SYS$YSDRIVER TXA3:
IO CONNECT/NOADAP/DRIVER=SYS$YSDRIVER TXA4:
EXIT
$!

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

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