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Compatibility vs. Native Mode
Compatibility mode allows you to run application programs compiled on an MPE V
computer system on an MPE XL computer system without change. Native mode
refers to application programs compiled and executed on an MPE XL computer
system.
NetIPC applications written for MPE V based HP 3000s can be migrated to MPE XL
HP 3000s (series 900s) and run in compatibility mode as follows. On the MPE-V
system, use the MPE STORE command to save your program's object code.
On the MPE XL system, use the MPE RESTORE command on your object code.
To take advantage of the optimizing compilers and improved performance on the
XL, you must recompile your application program on the MPE XL system that will
execute in native mode (NM). Some applications contain code that must be
altered before migrating to native mode.
Application migration considerations are documented in the Application
Migration Guide.
Example 2 in Chapter 4 "NetIPC Examples" shows the
differences in declarations required for compiling a NetIPC program in
compatibility mode and in native mode.
Option Variable
Many of the NetIPC intrinsics are option variable meaning they can be called
with a variable number of parameters. Required parameters are listed in the
discussion of each intrinsic. If you omit an optional parameter, the comma
delimiter (,) is required to preserve parameter position.
For example, a call using IPCCONNECT could be entered as follows:
IPCCONNECT ( CALLDESC, DEST, , , VCDESC, RESULT )
In this example, note that following the parameter DEST, commas
delimit the omitted optional parameters flags and
opt.
Syntax
The syntax description provided for each NetIPC intrinsic is the syntax
required for Pascal programs. Differences in parameter declarations for other
languages (if any) are documented in Appendix E "C Program
Language Considerations"
Capabilities
Some NetIPC intrinsics require special capabilities if you use the functions
described below.
User-specified Protocol Addressing
NetIPC intrinsics IPCCONNECT, IPCCREATE, and
IPCDEST allow you to specify protocol relative addresses. Addresses
in the range 30767 to 32767 decimal (%74057 to %77777) can be used without
special capabilities. In privileged programs you can specify protocol relative
addresses between 1 and 30766 decimal (%1 and %74056).
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NOTE: The protocol relative address range 1 to 30766 decimal, (%1 to
%74056) is administered by HP. Contact your HP representative before using
an address within this reserved range.
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X.25 Catch-all Socket
Using access to X.25 (level 3), network administrator (NA) capability is
required to create a catch-all socket for an X.25 network. NA capability is
required to run a program that creates a catch-all socket.
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