Developers guide

Chapter 11: Permanent Storage
Permanent Storage
Psion Teklogix Mobile Devices SDK Developers Guide 71
11.1 Permanent Storage
A small amount of permanent storage is provided on some Psion Teklogix computers. This
storage is accessible through the Mobile Devices SDK, but is not accessible through the Control
Panel. Data stored in permanent storage persists across power failure, all types of reset, and
through clean starts.
There is only one permanent memory location in each device; multiple applications on the same
device will not be able to use this memory for application-specific data.Typically, the permanent
storage is used for assigning customized serial numbers to each device or for asset tracking
purposes.
The following table shows what Psion Teklogix computers have permanent memory storage, and
how much is available.
11.2 Locking Permanent Storage
The Mobile Devices SDK provides an application with the ability to lock the permanent storage
area. There is no unlock ability.
11.3 Permanent Storage API Elements
C++: Permanent storage on all Psion Teklogix Windows computers is controlled using the
PsionTeklogix::System::SystemInformation namespace.
Java: Permanent storage on all Psion Teklogix Windows computers is controlled using the Sys-
temInformation class in the com.teklogix.system package.
.NET: Permanent storage on all Psion Teklogix Windows computers is controlled using the Sys-
temInformation class in the PsionTeklogix.SystemPTX namespace.
Important: The hardware used for permanent storage typically has a limited cycle life.
Repeated write operations may cause the memory to become corrupt and unrelia-
ble. It is therefore recommended that this memory storage not be used for data that
is expected to change frequently.
Computer Permanent Memory Available
WORKABOUTPRO 28 bytes
NEO 32 bytes
Warning: To unlock the permanent storage, the computer must be returned to the
Psion Teklogix repair depot. This cannot be a warranty repair.