Hardware reference guide

7535 Hardware Reference Guide 55
Chapter 5: Reinstalling The OS
Overview
Displaying The Datecode Of The Operating System
5.1 Overview
This section describes what you need to do to replace the operating system on your
7535.
The OS software image on a 7535 contains the Windows CE .NET operating system
(OS), the .NET runtime engine, and all the software included with the 7535. It may
also include Open TekTerm (Psion Teklogix’ terminal emulator program), or the
Jeode Java Virtual Machine (JVM).
OS images are available from Psion Teklogix in several slightly-different variants:
• with the .NET runtime engine (part number 1000891x)
• with the .NET runtime engine and TekTerm (part number 1000973x)
• with the .NET runtime engine and the Jeode JVM (part number 1000892x)
where x indicates the revision level, starting with A.
These variants may be distinguished as follows:
• The variant with TekTerm has the TekTerm icon on the desktop.
• The variant with the Java Virtual Machine has Jeode EVM in its Programs
menu. (Press Blue + 0, then select Programs, to reach this menu.)
A Windows registry key is set corresponding to these variants. The key
HKEY_LOCAL_MACHINE\SOFTWARE\Teklogix\CurrentVersion\ImageContents
is set to ‘SDK Image’, ‘TekTerm Image’ or ‘Java Image’, depending on the variant.
On rare occasions, it may be necessary to replace the 7535’s bootloader software or
the software in its peripheral controller. Contact Psion Teklogix support for assis-
tance (see Appendix A: Support Services And Worldwide Offices for details).
5.1.1 Displaying The Datecode Of The Operating System
There are a few ways to display the datecode of the operating-system software in the
7535. The version of this software is reported as a date code from the day the soft-
ware was built. The date code of the software image can be found using any of the
following methods:
• When running the TekTerm program, press Ctrl + Alt + 0 to show Tek-
Term’s Display Menu. TekTerm displays the date code of the software.