Windows Vista
5 Tips for running Windows Vista 5270 as a Virtual PC on a Tecra M4:
http://blogs.msdn.com/smguest/archive/2006/02/24/538821.aspx
Vista 5803 tweaks:
http://digitalfive.org/windows-vista-february-ctp-tips-and-tricks/
A freeware utility to rotate the screen.
http://www.softpedia.com/get/Tweak/Video-Tweak/iRotate.shtml
Toshiba Vista Support for Tecra M4
Includes Bios update etc...
Windows Vista RC1 Drivers for Tecra M4