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D i s p l a y
The printer has an 8-row display. The printers can display
characters in either reverse or normal video. A display
backlight is also available.
Several functions that manipulate the display use a coordinate
system to access a certain point on the display. Coordinate
(0,0) (row , column) is the display's upper-left corner.
The display is not compatible with any
standard IBM PC display adapter. There is
no program-accessible video memory.
Display Pages
The printer has two display pages (numbered 0-1).
An application can manipulate any display page, regardless of
the current page. To manipulate the display, use the functions
with the vid prefix (see Chapter 4, "Function Reference").
Each display page has its own cursor. Only one page appears
on the display at a time. To ensure the
application begins on the same display page every time, use
vidSetPage to set the display page at the application's
beginning.
display pages are empty at the application's beginning, use
vidScroll to clear the pages at the application's beginning
and end.
2-2 Programmer's Manual
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