Is your feature request related to a problem? Please describe.
No problems that went with this feature, I was asking for some few 80286 machines in 86Box.

Describe the solution you'd like

Since I've been using 86Box for months, I just wanted to add some few 80286 machines in 86Box.

There are 3 BIOS files in the zip file. Some 3 BIOS files include a readme file before you check at the BIOS files.
List of machines that needs to be added:

1. Sanyo MBC-25 PLUS
   Uses (Chips & Technologies 82C230 (Single Chip Model 30)) chipset,
   Internal video controller was an Western Digital WD90C00-JK.
   It has included an internal HDD controller BIOS.
   Maximum RAM of the Sanyo MBC-25 PLUS is 8MB.
   PS/2 mouse was supported
   Only has 3x 8-bit ISA slots, I think you can have support for 16-bit ISA cards.
   BIOS type: Phoenix Technologies
2. Schneider System 240
   Uses (Headland GC101,GC102 (12/16MHz PC/AT Compatible Chip Set)) chipset,
   It has an included internal video controller (low/high)
   Maximum RAM of the Schneider System 240 is 4MB.
   PS/2 mouse not supported
   BIOS type: Phoenix Technologies
3. Zenith Data Systems Z-248
   Uses (ZyMOS/Appian POACH) chipset,
   No internal video controller
   Maximum RAM of the Zenith Data Systems Z-248 is 6MB.
   PS/2 mouse not supported
   BIOS type: Zenith Data Systems
   NOTE: BIOS files are found on TheRetroWeb.

BIOS files are here:
80286 BIOS images (or files).zip
Before using the zip file, don't forget to use the readme file.
(If the BIOS files can be emulated, please let me know.)

Additional context
No additional context.