IAR Information Center for 8051

Release notes

for IAR Embedded Workbench for 8051 version 10.40.1

Read about the latest features, new device support, and program corrections in the release notes.

• Highlights
• Important information
• Release notes for individual components
• Product packages
• Installation and license activation

Highlights

Version 10.40

• Support for changing the addresses for the B and IE registers
  When the compiler generates an instruction that would result in an opcode that uses
  the address of B or IE, it now uses the external labels ?B and ?IE instead. These labels are
  then resolved by the linker, by specifying the values of the labels on the command line,
  i.e. -D?B=0xF0.

  All linker configuration files have been updated to include these definitions. If you are
  upgrading from an earlier version of IAR Embedded Workbench for 8051 and your project uses a
  custom linker configuration file, you must add the definitions to your configuration file to
  avoid linking errors.

  Note: The assembler does not support changed addresses. If the device has a
  non-standard address for the B register, replace it with ?B and remember to add EXTERN ?B.
  Note: If the B register is located on an address which is not bit-addressable, the runtime libraries will no longer be compatible and will not function properly.

• New option to place all code above bank zero for extended2 devices
  A new command line option --no_bank_zero has been added, to be used together with
  extended2 cores to force the compiler to generate code that makes no assumption which
  code bank the library support routines are placed in. Normally, they are placed in bank zero, but
  bank zero might be reserved (for example by a bootloader). This option makes it possible to place
  all code outside of bank zero.

Important information

• Upgrade information
• Before you install
  

  To avoid any problems, do not install this release in a directory where you have previously installed any older version of IAR Embedded Workbench. It is recommended that you either uninstall an earlier product, or install this release in a separate directory. As before, however, it is possible to install different products, all using the same version of the main application, in the same root directory.

• License renewal
  

  The upgrade to this version requires a license renewal. This can be performed by starting the IAR License Manager and selecting License→Check for License Renewal, or by using the Light License Manager with the command LightLicenseManager renew YOUR_PROD.EW.

• Microsoft SCC interface no longer supported
  

  Microsoft SCC-compatible version control systems are no longer supported by IAR Embedded Workbench.

• Microsoft Windows
  

  Windows Vista and newer operating systems have a security mechanism called UAC (User Access Control). Disabling UAC will automatically grant you permission when a task requires administrative rights but this is not recommended because it will reduce the security of the computer. It is not necessary to run the IAR Embedded Workbench IDE as an administrator. However, if you are not, modifications to the installed product tree in C:\Program Files\IAR Systems might not work as intended and could give unexpected results. One example is opening and building projects directly from the installed product tree. The build will succeed, but the resulting files (object, list, ...) will not appear where expected. Instead all output files will be redirected by the OS to C:\Users\<user name>\AppData\Local\VirtualStore\Program Files\IAR Systems. To avoid this, the preferred way is to copy the examples to a location outside Program Files, either manually or automatically by opening them via the IAR Information Center.

• Network licenses
  

  For network licenses, this version of the IAR Embedded Workbench requires IAR License Server Tools version 2.17.1 or later. For more information see technical note TN21842. The latest IAR License Server Tools are backwards-compatible with previous IAR Embedded Workbench versions.

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