--- a/include/fs.h	Sat Apr 09 01:28:06 2011 -0400
+++ b/include/fs.h	Sat Apr 09 11:18:57 2011 -0400
@@ -32,6 +32,7 @@
 u32 lookupFile(char *fname);
 int getFSize(u32 fid, u32 *size);
 int getFData(u32 fid, void *ptr);
+short isBlockAt(u32 block);
 void printFname(char *name);
 void getFname(char *fname);
 int fnameCmp(const char *a, const char *b);

--- a/src/fs.c	Sat Apr 09 01:28:06 2011 -0400
+++ b/src/fs.c	Sat Apr 09 11:18:57 2011 -0400
@@ -56,7 +56,6 @@
 	return 0;
 }
 
-
 //REQUIRES:   ptr is large enough to hold everything
 int getFData(u32 fid, void *ptr)
 {
@@ -82,6 +81,15 @@
 	return 0;
 }
 
+short isBlockAt(u32 block)
+{ //TODO reconsider return value
+	u32 inBlock = block/0x2000 + 2; //which block the bit is in
+	u32 blockSpot = (block%0x2000)/8; //which u8 the bit is in
+	u32 spotSpot = 7 - block%8; //which bit the bit is
+	u8 buffer[1024];
+	if(readFSBlock(DevID, inBlock, buffer)) return -1; //TODO should this be optimized and only read one block?
+	return (buffer[blockSpot] >> spotSpot) & 1;
+}
 
 void printFname(char *name)
 {