BDM-610000083
Rev L
Chapter 1: Introduction
17
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Of all single and dual-port modes, only the single RS-232 pinout is compatible with previous
generations of RTD cpuModules.
–
Dual-mode COM port pinouts permit dual RS-232, dual RS-422, and dual RS-485 modes. Unlike
some previous generations of RTD cpuModules, a dual “combined” mode with RS-232 and
RS-422/458 is not supported.
–
Unlike some previous cpuModule generations, the single-mode RS-422/485 pinouts of the
CMA34CR do not include the DCD, DSR, DTR, and RI signals.
–
When a COM port connector is configured for dual-port mode, enabling/disabling COM port
termination enables/disables the termination for both ports on that connector. (Some previous
generations of cpuModules have the ability to independently enable/disable termination on
both ports when configured for dual-mode.)
Software Differences
The newer Intel Core i7 cpuModules have several software-related differences, which are summarized below.
Complete information about these CMA34CR features can be found in Chapter 4,
aDIO
While the 16-pin aDIO connector is pin-for-pin compatible with previous generations of RTD cpuModules (such
as the Core 2 Duo series), the hardware is slightly different, and requires that writes and reads to/from the aDIO
ports happen no more than once per millisecond. Migrating legacy software to the CMA34CR that utilizes RTD’s
Advanced Digital I/O may require that you add this delay prior to all reads and writes.
UEFI Shell
Previous generations of RTD cpuModules contained a Fail-safe Boot ROM image, which permitted the
cpuModule to boot to a DOS prompt even when no disk drives were connected to the system. The RTD Intel
Core i7 cpuModules provide a similar prompt, called the Unified Extensible Firmware Interface (UEFI) Shell,
which provides an environment to execute simple commands. To boot this environment, the UEFI shell must be
configured as the first boot device in the BIOS setup.
•
64 Bit OS Installation using UEFI
–
To use the UEFI boot option you first need to enter the BIOS Setup and set the
Boot Type
to
UEFI Boot Type
or set
Boot EFI Device First
to enable.
–
Windows: The BIOS can detect some boot loaders such as the loader for Windows 7. The BIOS
will create a boot option just for Windows, this will replace the
Drive Boot Option
.
–
Linux: openSuse will install itself into the Boot Order list. Linux systems usually require the
GRUB-EFI boot loader to be re-installed when moving from system to system.
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