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Added support for switching between 40/80 columns. As the Apple //e 80 column firmware features converting the current screen content on switching if was already active before the idea is to keep the 80 column firmware active and initialize it (which clears the screen) only if necessary.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4140 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
ol.sc
2009-09-10 09:04:05 +00:00
parent 079358c3c1
commit 648a1b5427
4 changed files with 84 additions and 5 deletions
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10
doc/funcref.sgml
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@@ -77,6 +77,7 @@ function.
<item>_textframe
<item>_textframexy
<item><ref id="get_ostype" name="get_ostype">
<item><ref id="videomode" name="videomode">
</itemize>
@@ -5031,19 +5032,20 @@ used in presence of a prototype.
<quote>
<descrip>
<tag/Function/Switch to either 40 or 80 column mode.
<tag/Header/<tt/<ref id="c128.h" name="c128.h">/
<tag/Header/<tt/<ref id="apple2enh.h" name="apple2enh.h">,
<ref id="c128.h" name="c128.h">/
<tag/Declaration/<tt/unsigned __fastcall__ videomode (unsigned Mode);/
<tag/Description/Switch to 40 or 80 column mode depending on the argument. If
the requested mode is already active, nothing happens. The old mode is returned
from the call.
<tag/Limits/<itemize>
<item>The function is specific to the C128.
<item>This function is replaces <ref id="toggle_videomode"
<item>The function is specific to the C128 and enhanced Apple //e.
<item>This function replaces <ref id="toggle_videomode"
name="toggle_videomode">.
<item>The function is only available as fastcall function, so it may only be
used in presence of a prototype.
</itemize>
<tag/Availability/C128
<tag/Availability/C128 and enhanced Apple //e
<tag/See also/
<ref id="fast" name="fast">,
<ref id="slow" name="slow">,