update README.md

README.md

@@ -1,12 +1,19 @@
-# µSTL 2.3 sources for Casio Graph 90+E
+# Simple DirectMedia Layer SDL 1.2.15 sources for Casio Graph 90+E and Prizm CG10/20
 
 Need to have a fully working gcc toolchain for SH3/SH4 architecture.
 
 Compilation is done by using the adhoc Makefile :
-`make` in the main directory
+`make -f Makefile.prizm` in the main directory
 
-It should produce the library libustl.a
+It should produce the library libSDL_prizm.a
 
 The following steps are not automatically done, so please proceed with the following manipulations :
-* copy the library libustl.a into your SH3/SH4 compiler lib folder
-* copy all header files contained in the include foler into the include folder of the SH3/SH4 compiler
+* copy the library libSDL_prizm.a into your SH3/SH4 compiler lib folder
+* copy all header files contained in the include/SDL folder into the include folder of the SH3/SH4 compiler
+
+You can also use the `gitea install Slyvtt/cSDL1_2_15` command to get an automatic install
+
+when you compile a program for use with SDL, do not forget to add a `-lSDL_prizm` option in your compilator command line.
+
+and then a `#include <SDL/SDL.h>` in your C/C++ sources
+