Worth Data TriCoder t53, Руководство пользователя

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11-1
Chapter 11
Partitioning memory for data files and
tables
Storage memory in the TriCoder can be divided and used for different purposes.
Some memory can be allocated to store collected data while the remaining
memory might be set aside to store table data (see
Chapter 12, Tables and Pick
Lists for details). Memory is allocated or “partitioned” using the Partitions
setup parameter.
Up to 3 data files and 3 tables can be defined in the Partitions parameter. The
512K of memory in the TriCoder is divided into eight 64K blocks called
"pages". The TriCoder can have a maximum of 3 data files and 3 tables which
can be of varying memory sizes, as long as they add up to 512K.
Partitioning Memory
Each 64K block of memory is called a “page”. The TriCoder has 8 pages of
memory available. Memory is partitioned by assigning a number of pages
to a particular data file or table. Once you are in the
Partitions setup
parameter, you will see the following information on your TriCoder screen:
PARTITIONS?
abcdef_
where: a is the allocation for data file #1
b is the allocation for data file #2
c is the allocation for data file #3
d is the allocation for table #1
e is the allocation for table #2
f is the allocation for table #3
PARTITIONS?
700100_
The total number of pages must equal 8. In this example above, data file #1
is allotted 7 pages (448k), data files #2 and #3 none, table #1 is allotted 1
page (64K) and tables #2 and #3 are given none (0k). The size of a table
will determine how much memory needs to be set aside for it. In our
example, the largest table allowed would be 64K.
Using Multiple Data Files
Creating multiple data files in the TriCoder makes it easier to use different
programs in the TriCoder concurrently. If you have your memory
partitioned for only 1 data file, you can collect data for 1 program only –
you cannot collect data for another program until you have uploaded and
deleted the current data file. A good example might be that you have
created separate programs for shipping and receiving and need to be able to