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diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 3a255591c3..728233a8ff 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -164,6 +164,40 @@ previously available ``-tb-size`` option.
 Use ``-display sdl,show-cursor=on`` or
  ``-display gtk,show-cursor=on`` instead.
 
+``Configuring floppies with ``-global``
+'''''''''''''''''''''''''''''''''''''''
+
+Use ``-device floppy,...`` instead:
+::
+
+    -global isa-fdc.driveA=...
+    -global sysbus-fdc.driveA=...
+    -global SUNW,fdtwo.drive=...
+
+become
+::
+
+    -device floppy,unit=0,drive=...
+
+and
+::
+
+    -global isa-fdc.driveB=...
+    -global sysbus-fdc.driveB=...
+
+become
+::
+
+    -device floppy,unit=1,drive=...
+
+``-drive`` with bogus interface type
+''''''''''''''''''''''''''''''''''''
+
+Drives with interface types other than ``if=none`` are for onboard
+devices.  It is possible to use drives the board doesn't pick up with
+-device.  This usage is now deprecated.  Use ``if=none`` instead.
+
+
 QEMU Machine Protocol (QMP) commands
 ------------------------------------