Added em_use

git-svn-id: svn://svn.cc65.org/cc65/trunk@1719 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/c128/c128-georam.s

@@ -29,6 +29,7 @@
         .word   DEINSTALL
         .word   PAGECOUNT
         .word   MAP
+        .word   USE
         .word   COMMIT
 	.word	COPYFROM
         .word   COPYTO
@@ -79,6 +80,13 @@ PAGECOUNT:
         ldx     pagecount+1
         rts
 
+; ------------------------------------------------------------------------
+; USE: Tell the driver that the window is now associated with a given page.
+; The GeoRAM cartridge does not copy but actually map the window, so USE is
+; identical to MAP.
+
+USE     = MAP
+
 ; ------------------------------------------------------------------------
 ; MAP: Map the page in a/x into memory and return a pointer to the page in
 ; a/x. The contents of the currently mapped page (if any) may be discarded