[Bug 1895602] [NEW] older OS's do not detect CD change

[Michael Slade]

Public bug reported:

There are at least two older operating systems, being FreeBSD 2.2 and
FreeDOS 1.2, that misbehave when the change command is used on the IDE
CD drive, and work fine on a real machine.  In both cases, changing the
CD causes the guest to either refuse to read the disc or appear to read
bad data, and in both cases the guest read the disc without issue after
a system_reset.

A HD image that demonstrates this behavior can be produced if necessary,
however the FreeDOS 1.2 CD can be booted directly and used to test:

http://freedos.org/download/download/FD12CD.iso

(choose install then abort and you get a prompt in which you can type
"dir D:", say)

note, running eject before the change command does nothing to help.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1895602

Title:
  older OS's do not detect CD change

Status in QEMU:
  New

Bug description:
  There are at least two older operating systems, being FreeBSD 2.2 and
  FreeDOS 1.2, that misbehave when the change command is used on the IDE
  CD drive, and work fine on a real machine.  In both cases, changing
  the CD causes the guest to either refuse to read the disc or appear to
  read bad data, and in both cases the guest read the disc without issue
  after a system_reset.

  A HD image that demonstrates this behavior can be produced if
  necessary, however the FreeDOS 1.2 CD can be booted directly and used
  to test:

  http://freedos.org/download/download/FD12CD.iso

  (choose install then abort and you get a prompt in which you can type
  "dir D:", say)

  note, running eject before the change command does nothing to help.

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