IBM 3164 ASCII Manual page 142

Using the Create Partition/Page command to create the partition/page
Each viewport that you saw in the previous section has an independent
character buffer called a
partition.
A partition is made by the Create
Partition/Page command in the application program. You can organize the
data in a partition into fields having different attributes, such as protected,
unprotected, display, non-display, etc. A partition containing fields is a
formatted partition; a partition containing no fields is an unformatted partition.
You can create up to three partitions. Each partition identifier (PI D) has a
correspond ing viewport identifier (VI D) and all data in that partition are
displayed in the corresponding viewport.
Each partition can have up to four blocks of data called pages, with each page
having a unique page identifier (GID) from 1 to 4. All pages with the same
partition must have the same dimensions (rows and columns). The buffer
addresses for each page are also controlled independen.tly (in the same way as
the partition). If the partition contains only a single page, the partition can be
called a page and vice versa.
An area of the page equivalent in size to the viewport is called a
window
and
only one window exists for a page. You can select the window to be
displayed on the viewport either from the keyboard or from the host system.
The following figure shows the relationship between the partition, page,
viewport, and window.
Screen
Page 3
I
2'r------.
Partition-1
2 ,
Partition-2
4
I
3 ,
Partition-3
I-
5-55