Boundless Technologies ADDS 3153 ASCII - Manual (Page 46)

36 Setup
Columns: [80, 132, 80-Only]
Choose the number of columns that the screen can display. 80-Only provides more
pages in memory for a given page length by disallowing changes to 132-column
display.
Width Change Clear: [On, Off]
Select whether the screen is to be cleared when the number of columns on the screen is
changed from 80 to 132 or vice versa.
Changing columns from/to 80-only forces the screen to clear independent of Width
Change Clear.
Speed: [Fast, Normal]
Selecting “fast” improves the speed at which screen display occurs at the expense of
minor, temporary distortion of text called “tearing.”
Scroll: [ Smooth 1, Smooth 2, Smooth 4, Smooth 8, Jump]
Choose whether the data on the screen scrolls smoothly or “jumps” to accommodate
data at the rate it is received. Select the number of scan lines per second the page scrolls
up when smooth scroll is selected. Smooth 1 is the slowest rate and Smooth 8 is the
fastest.
Refresh Rate: [60 Hz, 71 Hz, 82 Hz, 100 Hz]
Select the rate (number of times per second) at which the image on your terminal’s
display is updated. This selection is only available in 26 line display mode.
Overscan Borders: [On, Off]
Choose whether the overscan borders are active. The borders extend video from one
edge of the screen to the next. (To see the borders, select
reverse for Screen Video.)
Viewports: [1 2 3 ]
Select number of viewports (up to 3 viewports can be selected on a page).
Viewport 1 Bottom Row [ 10 ]
1 through page length minus 1. This specifies the last row number of the first
viewport.
This parameter displays in Setup when number of viewports is greater than 1.