The Amstrad notepad NC100 was out in 1992 with the protext word processing (already on Amstrad CPC and Amstrad PCW). But it's also possible to use it with ZCN by Mark Russel wich is a native CP/M, or use the all new Fuzix (fuzix announced on google+), this time an unix (system 5) by Alan Cox. You can emulate an Amstrad NC100 (and also NC150 and NC200) with nc100em (still by Mark Russel) for linux or ms-dos, and since start of 2014 as I just discovered for windows (port by Stefano Bodrato). The MESS emulator also supports the 3 Amstrad notepad NC. If you dont have the original NC100 ROM, you will need the ZCN.BIN file included in ZCN v1.3. You will find more informations about the Amstrad Notepad NC on the excellent Tim's Amstrad NC users site (see ZCN page).