fix and tune to NP21kai 3
@@ -175,18 +175,22 @@ $ make install
### GCW Zero (GCW0)
##### Build
-1. Change directory to sdl2.
+1. Change directory into sdl2.
```
$ cd NP2kai/sdl2
```
2. Make.
```
-$ make -f Makefile21.gcw0 buildopk
+$ make -f Makefile.gcw0
+```
+or
+```
+$ make -f Makefile21.gcw0
```
##### Install binary
-1. Transfer np2kai.opk to /media/apps/ .
-2. BIOS files should locate in ~/.config/np2kai .
+1. Transfer np2kai.opk or np21kai.opk to /media/apps/ .
+2. BIOS files should locate in ~/.config/np2kai (or np21kai).
#### libretro port (Windows/Linux/macOS)
