MessagePad
100 (1994-1995)

CPU: ARM 610
Speed: 20 Mhz
Display: 336x240
BACKLIGHT: no
ROM: 4 MB
SRAM: 490 KB System
             150 KB Storage
BATTERY: 4 AAA alkaline
PCMCIA: 1 PC Card Type II
HEIGHT: 184.75 mm
WIDTH: 114.3 mm
DEPTH: 19.5 mm
Newton OS: 1.2 - 1.3

The 100 is identicial to the OMP, but with a newer OS.