From 2e5f99a9969123cf8e22f440a6342a55e0719247 Mon Sep 17 00:00:00 2001
From: Slyvtt <pillot.sylvain@gmail.com>
Date: Thu, 23 Mar 2023 21:07:15 +0100
Subject: [PATCH] update of README.md

---
 README.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/README.md b/README.md
index f5dda44..16e17e6 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,22 @@ The available options are:
 % fxsdk build-cg install
 ```
 
+**"Cross-Building" a fx-9860G II project for fx-CG 50**
+
+fx-9860G II sources can be automatically converted to run on fx-CG 50, provided no
+low level function/specific hardware manipulation/or syscall is used by the program.
+
+The command is very similar to fx-9860G II one, except it is `fxsdk build-fx-as-cg`
+instead of `fxsdk build-fx`.
+
+The available options are:
+
+```
+% fxsdk build-fx-as-cg
+% fxsdk build-fx-as-cg install
+```
+
+
 ## Using in CMake-based add-ins
 
 Find the `Gint` module and link against `Gint::Gint`. gint declares the include
@@ -125,6 +141,10 @@ using the fxSDK, you will need to:
 * Link with `-T fx9860g.ld -lgint-fx -lopenlibm -lc` on fx-9860G;
 * Link with `-T fxcg50.ld -lgint-cg -lopenlibm -lc` on fx-CG 50.
 
+Manually building a fx-9860G project to run on a fx-CG50 can be done :
+* Build with `-m4-nofpu -mb -DFXCG50 -DFX9860G_AS_CG`;
+* Link with `-T fxcg50.ld -lgint-fxascg -lopenlibm -lc`.
+
 If you don't have a standard library such as
 [Memallox's port of newlib](/PlaneteCasio/libc), you also need `-nostdlib`. I
 typically use `-m3 -mb` or `-m4-nofpu -mb` to specify the platform, but that