To use an NCP unformatted (raw) dump, you need to allocate it to NCPView, so that NCPView can access information in the dump as though it is a real NCP.
To access the NCP Dump Menu
The NCP : NCP Dump Menu appears.
From this menu, you can allocate (option AL) or unallocate (option UN) an unformatted NCP Dump file. For more information about the fields, press F1 (Help).
Note: The DD Name that is specified must not conflict with DDs already allocated and also cannot conflict with an existing NCP name.
When the process is complete, the following message appears:
ZNC0702 FUNCTION COMPLETED SUCCESSFULLY
For example, if a dump file was allocated using the option AL on the NCPView Control Functions menu with a DD name of PRODDUMP specified, then the NCP selection list includes an NCP with the name PRODDUMP with all the information that a real NCP has displayed. This line on the list appears in blue to distinguish it from real NCPs.
The first record in the unformatted dump file is a control record. The device type that produced the dump is indicated in the first word of the control record.
The format of the first word is XXXXXXTT. The following are possible values of the TT byte:
In a valid 3725/3720/3745 NCP dump, the actual NCP storage begins in the second record. The first word of the second record must contain X'714C01AA'.
The LRECL of the dump must be equal to 512 or 2048.
When a dump is accessed, only the required amount of storage is read into memory. For example, if you browse storage that is in the middle of the dump, then only half of the dump is read into memory. If the dump is not accessed for 30 minutes, the dump stored in memory is released, thus freeing memory; therefore, further access to the dump causes the dump to be read into memory again.
Most dumps are 4 or 8 Mb in size, although they can be up to 16 MB in size.
When considering how much virtual storage a dump may consume, the general rule is as follows:
storage_required = size _of _dump + 300K
Ensure that the size of your region is set to an appropriate value.
Note: All storage is above the 16 MB line.