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added note about conio stuff

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1092 b7a2c559-68d2-44c3-8de9-860c34a00d81
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izydorst 2001-10-27 17:09:02 +00:00
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doc/geos.sgml
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@ -6,7 +6,7 @@
<title>GEOSLib docs
<author>Maciej Witkowiak, <htmlurl url="mailto:ytm@elysium.pl" name="ytm@elysium.pl">
<date>v1.2, 26.12.1999, 16.03.2000, 19-22.03.2000, 11,29.07.2000, 3-4,15.07.2001
<date>v1.3, 26.12.1999, 16.03.2000, 19-22.03.2000, 11,29.07.2000, 3-4,15.07.2001, 27.10.2001
<abstract>
This is the documentation of cc65's GEOSLib, but information contained here may be also
useful for writting GEOS applications in general.
@ -37,8 +37,18 @@ resulting code will be smaller.
<tt/dio/ - direct disk access is available, but you might have problems with devices other
than 1541, 1571 or 1581. RAM drives emulating these should work.
<p>
It is safe to use these includes: <tt/dio.h, errno.h, geos.h, joystick.h, mouse.h, stdlib.h,
string.h/
<tt/conio/ - simple console input-output is available for command line applications. Note that
unlikely other platforms this implementation does not provide fullscreen capabilities, e.g.
you are on your own with checking last row and scrolling screen up etc. Color, line drawing and
clearing functions are disabled because color is not supported and line drawing art can be
easily done with graphics functions. Please note that a variable width font (to be specific:
current font, so you can load any font you like) is used so <tt/wherex, gotox/ family functions
will not always return the same values. In fact <tt/gotoxy/ sets current position to the place
you would expect on a normal 40x25 screen, not a position that would regard current font's
height. Both 40 and 80 columns modes are supported.
<p>
It is safe to use these standard includes: <tt/conio.h, dio.h, errno.h, geos.h, joystick.h,
mouse.h, stdlib.h, string.h/
<p>
I am an assembler programmer and GEOSLib was designed in such way that cc65 could emit the best
available code (well, the best as for machine :). Many of the <tt/void foo (void)/ functions are
@ -103,8 +113,8 @@ This chapter describes some rules you ought to obey, and how to use GEOSLib.
<sect1>General rules
<p>
Think twice before you use standard C library function. In current implementation almost always
you will get better code using only <tt/geos.h/. This will change in next releases as standard
functions will become wrappers to native GEOS Kernal.
you will get better code using only <tt/geos.h/. This is constantly changing as standard
functions are becoming wrappers to native GEOS Kernal with the new releases.
<p>
Apart from this file, which merely describes only standard GEOS library functions, you should read
<tt/grc/ (GEOS resource compiler) documentation. There are informations about necessary resource