97 lines
4.7 KiB
HTML
97 lines
4.7 KiB
HTML
|
<HTML>
|
||
|
|
<HEAD><TITLE>QuickBASIC 3.0 - Long Entry</TITLE></HEAD>
|
||
|
|
<BODY>
|
||
|
|
|
||
|
|
<A HREF="ng2c52c.html">[<<Previous Entry]</A>
|
||
|
|
<A HREF="ng320.html">[^^Up^^]</A>
|
||
|
|
<A HREF="ng2d400.html">[Next Entry>>]</A>
|
||
|
|
<A HREF="menu.html" >[Menu]</A>
|
||
|
|
<A HREF="info.html">[About The Guide]</A>
|
||
|
|
<HR>
|
||
|
|
<PRE>
|
||
|
|
<B>SCREEN Set Screen Attributes Statement</B>
|
||
|
|
|
||
|
|
<B>SCREEN</B> [<U>mode</U>][,[<U>colorflag</U>]][,[<U>apage</U>]][,[<U>vpage</U>]]
|
||
|
|
|
||
|
|
Sets screen parameters for use by subsequent statements.
|
||
|
|
|
||
|
|
<U>mode</U> A numeric expression. Must be 0, 1, 2, 7, 8, 9, or 10. See
|
||
|
|
table below.
|
||
|
|
|
||
|
|
<U>colorflag</U> A numeric expression. Turns color on or off for composite
|
||
|
|
monitors (color is always on for RGB monitors). In text
|
||
|
|
mode, a zero value turns color off; a nonzero value turns
|
||
|
|
color on. Works the opposite way in medium-resolution
|
||
|
|
graphics mode: A zero value turns color on, while a
|
||
|
|
nonzero value turns color off. In screen mode 2, <U>colorflag</U>
|
||
|
|
is irrelevant.
|
||
|
|
|
||
|
|
<U>apage</U> An integer expression specifying the active screen page
|
||
|
|
(the page written to by statements that output to the
|
||
|
|
screen). Valid only in screen modes 0, 7, 8, 9, and 10.
|
||
|
|
Legal values depend on screen mode (see table below).
|
||
|
|
|
||
|
|
<U>vpage</U> An integer expression specifying the visual screen page
|
||
|
|
(the page displayed on screen; may be different from the
|
||
|
|
active page). Valid only in screen modes 0, 7, 8, 9, and
|
||
|
|
10. Legal values depend on screen mode (see table below).
|
||
|
|
|
||
|
|
<B>Screen modes:</B>
|
||
|
|
|
||
|
|
------------------------------------------------------------------------
|
||
|
|
SCREEN 0 | 40 x 25 text | 16 colors, 2 attributes (CGA) | MDA, CGA, EGA
|
||
|
|
| 80 x 25 text | 16 colors, 16 attributes (EGA |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 1 | 320 x 200 | 16 colors, 4 attributes | CGA, EGA
|
||
|
|
| 40 x 25 text | |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 2 | 640 x 200 | 16 colors, 2 attributes | CGA, EGA
|
||
|
|
| 80 x 25 text | |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 7 | 320 x 200 | 16 colors, 16 attributes | EGA only
|
||
|
|
| 40 x 25 text | 2 pages if 64K on EGA |
|
||
|
|
| | 4 pages if 128K on EGA |
|
||
|
|
| | 8 pages if 256K on EGA |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 8 | 640 x 200 | 16 colors, 16 attributes | EGA only
|
||
|
|
| 80 x 25 text | 1 page if 64K on EGA |
|
||
|
|
| | 2 pages if 128K on EGA |
|
||
|
|
| | 4 pages if 256K on EGA |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 9 | 640 x 350 | 16 colors, 16 attributes | EGA only
|
||
|
|
| 80 x 25 text | if >64K on EGA; |
|
||
|
|
| in 8 x 14 | 16 colors, 4 attributes |
|
||
|
|
| matrix | if 64K on EGA; |
|
||
|
|
| | 2 pages if 256K on EGA |
|
||
|
|
----------+--------------+-------------------------------+--------------
|
||
|
|
SCREEN 10 | 640 x 350 | 9 pseudo colors, 4 attributes | EGA only
|
||
|
|
| 80 x 25 text | 2 pages if 256K on EGA |
|
||
|
|
| in 8 x 14 | |
|
||
|
|
| matrix | |
|
||
|
|
------------------------------------------------------------------------
|
||
|
|
|
||
|
|
<B>Notes:</B> All arguments are optional; omitted parameters retain
|
||
|
|
former values.
|
||
|
|
|
||
|
|
All display pages share a single cursor. Therefore, it's
|
||
|
|
advisable to save cursor position (with POS and CSRLIN)
|
||
|
|
when switching pages.
|
||
|
|
|
||
|
|
If a valid SCREEN statement results in a new display mode,
|
||
|
|
BASIC erases the screen and sets colors to white
|
||
|
|
(foreground) on black (background and border). If a SCREEN
|
||
|
|
statement does not produce a new display mode, BASIC does
|
||
|
|
not erase the screen.
|
||
|
|
</PRE>
|
||
|
|
<HR>
|
||
|
|
<B>See Also:</B>
|
||
|
|
<A HREF="ng86fb.html">COLOR</A>
|
||
|
|
<A HREF="ng23171.html">PALETTE</A>
|
||
|
|
<A HREF="ng23637.html">PALETTE USING</A>
|
||
|
|
<HR>
|
||
|
|
This page created by ng2html v1.05, the Norton guide to HTML conversion utility.
|
||
|
|
Written by <A HREF="http://www.acemake.com/hagbard">Dave Pearson</A>
|
||
|
|
<HR>
|
||
|
|
</BODY>
|
||
|
|
</HTML>
|