Replaced em_mapclean by em_commit

git-svn-id: svn://svn.cc65.org/cc65/trunk@1682 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/c64/c64-georam.s

@@ -29,7 +29,7 @@
         .word   DEINSTALL
         .word   PAGECOUNT
         .word   MAP
-        .word   MAPCLEAN
+        .word   COMMIT
 	.word	COPYFROM
         .word   COPYTO
 
@@ -81,8 +81,8 @@ PAGECOUNT:
 
 ; ------------------------------------------------------------------------
 ; 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) are assumed to be
-; dirty and must be saved into secondary storage if this is necessary.
+; a/x. The contents of the currently mapped page (if any) may be discarded
+; by the driver.
 ;
 
 MAP:    sta     tmp1
@@ -100,16 +100,13 @@ MAP:    sta     tmp1
 
         lda     #<GR_WINDOW
         ldx     #>GR_WINDOW
-        rts
+
+; Use the RTS from COMMIT below to save a precious byte of storage
 
 ; ------------------------------------------------------------------------
-; MAPCLEAN: 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) are assumed to
-; be clean, so if this is an advantage for the driver, the current contents
-; may be discarded.
-
-MAPCLEAN        = MAP           ; Identical for GEORAM
+; COMMIT: Commit changes in the memory window to extended storage.
 
+COMMIT: rts
 
 ; ------------------------------------------------------------------------
 ; COPYFROM: Copy from extended into linear memory. A pointer to a structure

libsrc/em/Makefile

@@ -14,10 +14,10 @@
 C_OBJS =        em_load.o
 
 S_OBJS =       	em-kernel.o	\
+                em_commit.o     \
 		em_copyto.o	\
 		em_copyfrom.o	\
 		em_map.o	\
-		em_mapclean.o 	\
 		em_pagecount.o	\
 		em_unload.o	\
 

libsrc/em/em-kernel.s

@@ -27,7 +27,7 @@ emd_install:   	jmp     $0000
 emd_deinstall: 	jmp     $0000
 emd_pagecount:  jmp     $0000
 emd_map:        jmp     $0000
-emd_mapclean:   jmp     $0000
+emd_commit:     jmp     $0000
 emd_copyfrom:	jmp     $0000
 emd_copyto:     jmp     $0000
 

libsrc/em/em_commit.s

@@ -0,0 +1,16 @@
+;
+; Ullrich von Bassewitz, 2002-12-01
+;
+; void __fastcall__ em_commit (void);
+; /* Commit changes in the memory window to extended storage. If the contents
+;  * of the memory window have been changed, these changes may be lost if
+;  * em_map, em_copyfrom or em_copyto are called without calling em_commit
+;  * first. Note: Not calling em_commit does not mean that the changes are
+;  * discarded, it does just mean that some drivers will discard the changes.
+;  */
+
+        .include        "em-kernel.inc"
+
+       	_em_commit      = emd_commit            ; Use driver entry
+
+                                   

libsrc/em/em_mapclean.s

@@ -1,17 +0,0 @@
-;
-; Ullrich von Bassewitz, 2002-11-29
-;
-; void* __fastcall__ em_mapclean (unsigned page);
-; /* Unmap the current page from memory and map a new one. The function returns
-;  * a pointer to the location of the page in memory. This function differs from
-;  * em_map_page() in that it will discard the contents of the currently mapped
-;  * page, assuming that the page has not been modified or that the modifications
-;  * are no longer needed, if this leads to better performance. NOTE: This does
-;  * NOT mean that the contents of currently mapped page are always discarded!
-;  */
-
-
-        .include        "em-kernel.inc"
-
-       	_em_mapclean    = emd_mapclean         ; Use driver entry
-