Added short documentation of the recently added ioctl for mixing graphics with 4...

[cc65] / doc / apple2.sgml

diff --git a/doc/apple2.sgml b/doc/apple2.sgml
index 6656041130f72ab24a54113ccb49716d75f02c2d..df578981b77f81c40f9ddee708c882cbd629ccc0 100644 (file)
--- a/doc/apple2.sgml
+++ b/doc/apple2.sgml
@@ -315,6 +315,9 @@ you cannot do it, it just means that there's no help.
 
   <tag><tt/a2.lo.tgi/</tag>
   This driver features a resolution of 40&times;48 with 16 colors.
+       
+       The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
+       function clears the corresponding area at the bottom of the screen.
 
   <tag><tt/a2.hi.tgi/</tag>
   This driver features a resolution of 280&times;192 with 8 colors and two
@@ -322,6 +325,9 @@ you cannot do it, it just means that there's no help.
   with <tt/--start-addr $4000/ to reserve the first hires page or with
   <tt/--start-addr $6000/ to reserve both hires pages.
   
+       The function <tt/tgi_apple2_mix()/ allows to activate 4 lines of text. The
+       function doesn't clear the corresponding area at the bottom of the screen.
+
   In memory constrained situations the memory from &dollar;803 to &dollar;1FFF
   can be made available to a program by calling <tt/_heapadd ((void *) 0x0803, 0x17FD);/
   at the beginning of <tt/main()/. Doing so is beneficial even if the program