Boundless Technologies ADDS 3153 ASCII manual Width Change Clear On, Off

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.