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4-46 Agilent 87130A Operating and Service Manual
Remote Operation
:FREE?
:FREE?
Syntax
MEMory:Free?
Description
This is a query which returns the number of bytes that remain in RAM for
storing configuration data, followed by the number of bytes initially
available. The two quantities are separated by commas. For a brand new
system there are around 13,000 bytes initially available.
The group names and titles, power fail, verify and drive lists, and device
switching times are saved in a fixed size area of memory, and available RAM
is unaffected by changing this data.
For the rest of the data, it is allocated as needed. For any given
PATH, one
or more of the eight cards in the 87130A will be represented. It takes nine
bytes to store the complete state of a card and only those cards actually
referenced in a given path are saved.
Path titles take up the number of characters in title, and path names take up
the number of characters in the name. Every path added to a group takes up
one byte. It is up to the user to allocate this memory as appropriate; for
example, if a lot of path data is going to be used, path names and titles can be
kept short to conserve space.