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-rw-r--r--baremetal/boot.hex2
1 files changed, 1 insertions, 1 deletions
diff --git a/baremetal/boot.hex b/baremetal/boot.hex
index d40f7d45..b1163d0a 100644
--- a/baremetal/boot.hex
+++ b/baremetal/boot.hex
@@ -64,7 +64,7 @@
   b5 00  # ch <- 0  # cylinder 0
   b6 00  # dh <- 0  # track 0
   b1 02  # cl <- 2  # second sector, 1-based
-  b0 04  # al <- 4  # number of sectors to read
+  b0 04  # al <- 4  # number of sectors to read; all sectors must be in a single track
   # address to write sectors to = es:bx = 0x7e00, contiguous with boot segment
   bb 00 00  # bx <- 0
   8e c3  # es <- bx