8ae0 instead of 8e00, thanks yandong

bio.c

@@ -109,6 +109,7 @@ bread(uint dev, uint sector)
 void
 bwrite(struct buf *b)
 {
+  cprintf("bwrite sector %d\n", b->sector);
   if((b->flags & B_BUSY) == 0)
     panic("bwrite");
   b->flags |= B_DIRTY;

bootasm.S

@@ -75,7 +75,7 @@ start32:
   movw    $0x8a00, %ax            # 0x8a00 -> port 0x8a00
   movw    %ax, %dx
   outw    %ax, %dx
-  movw    $0x8e00, %ax            # 0x8e00 -> port 0x8a00
+  movw    $0x8ae0, %ax            # 0x8ae0 -> port 0x8a00
   outw    %ax, %dx
 spin:
   jmp     spin

bootother.S

@@ -69,7 +69,7 @@ start32:
   movw    $0x8a00, %ax            # 0x8a00 -> port 0x8a00
   movw    %ax, %dx
   outw    %ax, %dx
-  movw    $0x8e00, %ax            # 0x8e00 -> port 0x8a00
+  movw    $0x8ae0, %ax            # 0x8ae0 -> port 0x8a00
   outw    %ax, %dx
 spin:
   jmp     spin

file.c

@@ -116,6 +116,7 @@ filewrite(struct file *f, char *addr, int n)
     return pipewrite(f->pipe, addr, n);
   if(f->type == FD_INODE){
     ilock(f->ip);
+    cprintf("filewrite: %d\n", n);
     if((r = writei(f->ip, addr, f->off, n)) > 0)
       f->off += r;
     iunlock(f->ip);