Describe the bug
The machine "Quadtel 286 clone" throws the error "80287 internal register error" during POST if an FPU is added to it.

To Reproduce
Steps to reproduce the behavior:

1. Click on Tools-Settings
2. On "Machine type" select 286, and on "Machine" select the before-mentioned machine.
3. On "FPU" select either 287 or 287XL (both behave the same)
4. Click "Ok"
5. See error

Expected behavior
The non-existance of this message.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• 86Box version: 3.3 (build 3722)
• Build information: Old Dynarec, 32-bit

Additional info
Figured out that this occurs in real hardware with the 287XL, but is not supposed to happen on the regular 287, so fix that ig?