User`s guide

80 DC 900-1516D
ICP2432 User’s Guide for OpenVMS Alpha (DLITE Interface)
Follow these steps to use the node auto-assignment:
1. Download the protocol software with set the flag of IO$_STARTMPROC function.
(When the icpload utility is used, set the /DLITE qualifier on the START com-
mand. See Section 6.4.3.4 on page 97 for more information about the
START
command.)
2. The application assigns the device and gets the channel number.
3. The application issues IO$_STARTDATA to assign the node number and get it.
(See Section 4.2.4.4 on page 68 for more information about IO$_STARTDATA.)
4. The application issues IO$_READxBLK and IO$_WRITExBLK.
4.5 Compatibility with Older ICP Protocols
Protogate’s BSC and FMP protocol software for the ICP2432 now has the capability of
emulating the interface used by older ICP products such as the ICP1622, ICP3222, and
DEC Commserver. If you already have a VMS program using BSC or FMP on one of
these devices, your interface does not have to change. When you send the
Set Buffer Size
command to node 1 (port 0), the BSC or FMP software automatically detects (from the
size of the packet) that you are using the older style of interface. The protocol software
then posts reads on all nodes associated with port numbers in addition to the data ack,
control, and trace nodes.
When using this method of interface, each read or write must contain the 8-byte proto-
col header and commands as described in your original BSC or FMP programmer’s
guide.
4.6 Protocol Toolkit
If you have purchased Protogate’s Protocol Toolkit for the ICP2432, the Sample Proto-
col Software (SPS) example uses the DLI session interface. The toolkit allows you to
change this to whatever style of interface you want to use, however, Protogate recom-
12/3/98 Leslie:
Ginni had the
first part of
the first bullet
underlined,
but no note.