initial commit!

libs/libgccvb/mem.c

@@ -0,0 +1,37 @@
+#include "types.h"
+#include "mem.h"
+
+
+u8* const	EXPANSION =	(u8*)0x04000000;	// Expansion bus area
+u8* const	WORKRAM =	(u8*)0x05000000;	// Scratchpad RAM; USE WITH CAUTION! (In fact, just leave it alone!)
+u16* const	SAVERAM =	(u16*)0x06000000;	// Cartridge's Battery-backed SRAM
+
+
+/***** Ancillary Functions *****/
+
+// Copy a block of data from one area in memory to another.
+void copymem (u8* dest, const u8* src, u16 num)
+{
+	u16 i;
+	for (i = 0; i < num; i++) {
+		*dest++ = *src++;
+	}
+}
+
+// Set each byte in a block of data to a given value.
+void setmem (u8* dest, u8 src, u16 num)
+{
+	u16 i;
+	for (i = 0; i < num; i++) {
+		*dest++ = src;
+	}
+}
+
+// Copy a block of data from one area in memory to another, adding a given value to each byte, first.
+void addmem (u8* dest, const u8* src, u16 num, u8 offset) 
+{
+	u16 i;
+	for (i = 0; i < num; i++) {
+		*dest++ = (*src++ + offset);
+	}
+}