IUCV External Interrupt Formats
The following figures represent the content and format of the data presented on
each of the lUCY external interrupts.
External Interrupt for Pending Connection
o
8 10 18 20 o 1 IPPATHID 2
When a virtual machine or CP system service invokes the CONNECT function, an
external interrupt is reflected to the target virtual machine or passed by the lUCY communications processor to the CONNECT entry point of the requested CP sys­
tem service.
The format and content of the external interrupt data is:
3 4 5 6 7 IIPFLAGSI !IPTYPE I IPMSGLIM IIPFCNCD ! ////// IPvtlID IPUSER IPUSER ///////////////////////////////////////////////////////////////
Figure 19. Pending Connection External Interrupt Format
External Interrupt for Complete Connection
o
8 10 18 20 o 1 IPPATHID 2
When CONNECT invoked by a virtual machine or CP system service has been
responded to by the target virtual machine or CP system service, the external inter­
rupt data has the following format:
3 4 5 6 7 IIPFLAGSI !IPTYPE ! IPMSGLIM I ////////////
//////////////////////////////////////////////////////////////// IPUSER IPUSER ////////////////////////////////////////////////////////////////
Figure 20. Connection Complete External Interrupt Format
External Interrupt for Pending Messages
When a message is pending for a communicator, the external interrupt data has the
following format. Note that the format of this data is the same as the output of the
DESCRIBE function. Inter-User Communications Vehicle 159

o 8 10 18 20 o 1 2 3 4 5 6 7 IPPATHID IIPFLAGSI I IPTYPE IPMSGID IPTRGCLS I IPBFLN1F / IPRMMSG2 //////////////////////////////
//////////////////////////////////////////////////////////////// IPBFLN2F //////////////////////////////
Figure 21. Incoming Message External Interrupt Format
External Interrupt for Complete Messages
o 8 10 18 20 o 1 IPPATHID IPAUDIT 2
When a message is complete for a communicator, the external interrupt data has
the following format. Note that the format of this data is the same as the output of
the TEST COMPLETION function.
3 4 5 6 7 IPFLAGSI I IPTYPE IPMSGID ///////////////// IPRMMSGI IpRr1MSG2 IPSRCCLS IPi'1SGTAG ///////////////////////////// IPBFLN2F /////////////////////////////
Figure 22. Message Complete External Interrupt Format
External Interrupt from SEVER, QUIESCE, RESUME o 8 10 18 20 o 1 IPPATHID 2
When a SEVER, QUIESCE, or RESUME function has been invoked for a path to
a virtual machine or CP system service, an external interrupt is generated. No
action need be taken by a virtual machine or CP system service on a QUIESCE or
RESUME. The interrupt is reflected so that the status of the path can be recorded.
When the SEVER function has been invoked by the communicating partner, this
communicator must also invoke SEVER.
3 4 5 6 7 I /////// \IPTYPE I //////////////////////////////
//////////////////////////////////////////////////////////////// IPUSER IPUSER ////////////////////////////////////////////////////////////////
Figure 23. SEVER, QUIESCE, RESUME External Interrupt Format 160 VM/SP System Programmer's Guide .