Australia map for igo8 download. - - - - - - - - - - - - Windows CE 5.0 vs 6.0 by Ashok Babu.K Introduction There has been lot of queries regarding differences between 5.0 and 6.0 and we thought it would be useful to our customers and also people involved in Windows CE development to know more about it. This article will be the first in the series of articles about Windows CE 6.0. The major changes in 6.0 are • Process address space is increased from 32MB to 1 GB. • Number of processes has been increased to 32K from 32. • User mode and kernel mode device drivers are possible.

Windows Embedded CE 6.0 R3 provides innovative technologies that help device manufacturers create devices with rich user experiences and connections to Windows PCs, servers, and services. This download is an incremental release to Windows Embedded CE 6.0 R2.

• Device.exe, filesys.exe, GWES.exe has been moved to Kernel mode. • SetKMode and set process permissions not possible. Honda radio code generator. • System call performance will improve. Process address space The existing implementation of Windows CE 5.0 supports only 32 MB per process and is based on the Slot implementation. Every process apart from its native slot ( Slot 2 – 33) used Slot 0 while running. As mentioned in the figure 1 if filesys.exe running from Slot 2 has to run then it has to run from Slot 0.

So if a.exe belonging to Slot 24 is running from Slot 0 apart from its native slot 24 all other processes also occupy the respective virtual address space. This actually leads to wastage in Virtual address space. A quick question would be why then such architecture was arrived at when it was known that it is not scalable. The answer to this is beyond the scope of this article and shall be discussed separately in later articles to come. Figure 1 Windows CE 6.0 has moved towards the desktop OS format. Each process can now occupy up to 1 GB of address space and the number of processes can be up to 32K. Microsoft confirms that it has tested up to 2600 processes running simultaneously.

The process switching is more like desktop like process switching like every time a process switch happens the entire TLB is flushed, data and instruction cache is invalidated and fresh page tables are created(if the process is new). Compared to Windows CE 5.0 this should take more time to switch a process. Figure 2 illustrates the architecture in Windows CE 6.0. Figure 2 You can see Windows CE allows a user process to go up to 1 GB. The other 1 GB is towards DLLs, shared memory and Kernel shared heap.

The shared memory is for backward compatibility with Windows CE 5.0 for sharing of files across processes. The DLLs which were earlier restricted to 32MB of space(Slot 1) are now allowed to have 512MB of virtual address space starting from 0x40000000. The important part is one process cannot view another process data directly like Windows CE 5.0. It has to go through kernel API to get data from other processes. Device driver architecture changes developers should know that the Windows CE 6.0 allows kernel mode device drivers and user mode device drivers. The idea of kernel mode drivers is for more security and robustness. OEMs can prevent drivers from getting accesses to kernel resources by third party drivers and hence can offer more security to his installation.