diff -Naur linux-0.01-rm-3.3/fs/exec.c linux-0.01-rm-3.5/fs/exec.c
--- linux-0.01-rm-3.3/fs/exec.c	2007-12-29 23:50:39.000000000 +0100
+++ linux-0.01-rm-3.5/fs/exec.c	2008-01-24 16:08:45.000000000 +0100
@@ -269,19 +269,20 @@
 	bh=read_file_block(inode,block_num);
 	if (!bh) return -1;
 	cp_size=(size<BLOCK_SIZE-block_offset)?size:BLOCK_SIZE-block_offset;
-	cp_block(bh->b_data+block_offset,(void*)dest,cp_size);
+	//note we add 3 to size to get it aligned to word boundary
+	cp_block(bh->b_data+block_offset,(void*)dest,cp_size+3);
 	brelse(bh);
 	dest+=cp_size;
 	size-=cp_size;
 	block_num++;
 
-	//read other block
+	//read others blocks
 	while(size)
 	{
 		bh=read_file_block(inode,block_num);
 		if (!bh) return -1;
 		cp_size=(size<BLOCK_SIZE)?size:BLOCK_SIZE;
-		cp_block(bh->b_data,(void*)dest,cp_size);
+		cp_block(bh->b_data,(void*)dest,cp_size+3);
 		block_num++;
 		size-=cp_size;
 		dest+=cp_size;
diff -Naur linux-0.01-rm-3.3/include/unistd.h linux-0.01-rm-3.5/include/unistd.h
--- linux-0.01-rm-3.3/include/unistd.h	2007-12-29 12:46:02.000000000 +0100
+++ linux-0.01-rm-3.5/include/unistd.h	2008-01-24 14:31:48.000000000 +0100
@@ -54,6 +54,7 @@
 #include <sys/times.h>
 #include <sys/utsname.h>
 #include <utime.h>
+#include <dirent.h>
 
 #ifdef __LIBRARY__
 
diff -Naur linux-0.01-rm-3.3/kernel/hd.c linux-0.01-rm-3.5/kernel/hd.c
--- linux-0.01-rm-3.3/kernel/hd.c	2007-12-26 12:00:08.000000000 +0100
+++ linux-0.01-rm-3.5/kernel/hd.c	2008-01-24 16:21:02.000000000 +0100
@@ -192,6 +192,7 @@
 	outb_p(sect,++port);
 	outb_p(cyl,++port);
 	outb_p(cyl>>8,++port);
+	/*0xB0 for slave, 0xA0 for master*/
 	outb_p(0xB0|(drive<<4)|head,++port);
 	outb(cmd,++port);
 }
diff -Naur linux-0.01-rm-3.3/Makefile linux-0.01-rm-3.5/Makefile
--- linux-0.01-rm-3.3/Makefile	2007-12-26 13:01:59.000000000 +0100
+++ linux-0.01-rm-3.5/Makefile	2008-01-24 14:17:39.000000000 +0100
@@ -61,8 +61,8 @@
 	(cd lib; make)
 
 boot/boot:	boot/boot.s tools/system
-	(echo -n "SYSSIZE = (";ls -l tools/system | grep system \
-		| cut -c31-37 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s
+	(echo -n "SYSSIZE = (";stat -c%s tools/system \
+		| tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s	
 	cat boot/boot.s >> tmp.s
 	$(AS86) -o boot/boot.o tmp.s
 	rm -f tmp.s