Memory; Disk Compression; Peripheral Power - Husky MP2500 Manual

Memory

FS/2 can only address 1MB of memory directly and can only execute real
mode code due to its 8088-class processor.
Unlike FS/2 which contains SRAM, the DRAM memory in MP2500 and FS3
is not used for disk purposes but for program execution. MP2500 and FS3
use CompactFlash for disk storage.
MP2500 and FS3 can address 64MB directly and execute both real mode
and protect mode code, due to their 80386sx-class processor; 128K of
Upper Memory Block (UMB) is accessible.
Note that DOS extenders, and expanded memory (EMS) using
EMM386.EXE are not supported.

Disk compression

FS/2 does not support disk compression via DRVSPACE.
MP2500 and FS3 do support disk compression via the DRVSPACE utility
supplied with MSDOS 6.22.

Peripheral power

The standard MP2500 does not provide 5V out.
FS3 and FS/2 provide power (5V out) for external peripherals via their serial
port connectors.
348 H MP2500 System Developer's Guide
USKY