HP 3000 Manuals HP 3000 Manuals
NetIPC Between MPE-XL and MPE-V Systems
NetIPC applications can be written to communicate between MPE-V and MPE
XL-based HP 3000s with the following considerations:
* In addition to the X.25 features supported on MPE-V, NetIPC on MPE XL
systems supports the following:
* Fast select facility
* Ability to append, generate and examine the facility field in
call packets
* Directly specifying the remote host X.25 address or PVC number.
* There are additional differences between the MPE-V and MPE XL X.25
implementations that can affect NetIPC programming:
* On MPE XL, IPCCONTROL request 12, reason for error or event only
returns 10 (clear), 11 (reset), or 12 (interrupt). On MPE-V, in
addition to returning 10, 11, 12, IPCCONTROL returns 14 (network
shutdown), 15 (restart sent by local network), 16 (level 2
failure), 17(restart sent by local protocol module), and 18
(restart packet received).
* On MPE XL, IPCSHUTDOWN completes immediately, while on MPE-V it
does not complete until a clear confirmation arrives.
* On MPE XL, PAD calls are sent to the catch-all socket while on
MPE-V PAD calls are sent to socket #2563.
* On MPE XL a reset is not sent to initialize or clear a PVC, while
on MPE-V a reset is sent.
* MPE-V has a timeout for interrupt collisions, MPE XL does not.
* On MPE XL, the IPCCREATE parameter network name must be padded
with blanks while on MPE-V, the network name is padded with
nulls.