rtd cpuModule CMX147786HX, Руководство пользователя

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CMX147786HX RTD Embedded Technologies, Inc.
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Booting to Boot Block Flash with Fail Safe Boot ROM
The Fail Safe Boot ROM is a special build of ROM-DOS™ located inside a surface mounted Boot
Block Flash chip that is memory mapped to the SSD window. Boot Block Flash is a write protected
flash device that contains the BIOS and extra room where the Fail Safe Boot ROM is stored in the
ROM DISK. The build is special because it can understand the ROM DISK format on the flash chip.
Additionally, Fail Safe Boot ROM is an emergency interface accessible by an external computer.
The ROM DISK contains REMDISK and REMSERVE for remote access to the system’s disk
drives. Due to the size of the flash chip, Fail Safe Boot ROM contains an abbreviated selection of
the ROM-DOS™ utilities, however, the complete ROM-DOS™ is contained on a CD shipped with
the board.
The purpose of the Fail Safe Boot ROM is to make the board bootable when the customer receives
the cpuModule. Fail Safe Boot ROM can be used as an indicator of the board’s functionality when
booting problems arise with another operating system. This test can be accomplished by installing
JP5. Installing JP5 forces the cpuModule to boot to Fail Safe Boot ROM, as well as load the default
BIOS settings. The ROM DISK that contains the Fail Safe Boot ROM acts as an example of what
can be programmed into the flash chip. Last, Fail Safe Boot ROM allows files to be transferred on
or off the storage devices in the system by use of REMSERV and REMDISK, two ROM-DOS™
utilities.
If the user would need remote access to the system run REMSERV on the target system and REM-
DISK on the host system. The end result would be that the storage devices on the target system
would appear as additional drives on the host system. Information could then be transferred between
hard disks by using a standard NULL Modem cable over a serial port. REMSERV makes the con-
nection appear as an additional drive to the user. For details concerning this type of access, please
refer to the ROM-DOS™ user’s guide shipped with your board
The first time, your system will boot to the DOS prompt at the first available drive letter. If you do
not intend to use REMSERV or REMDISK or you intend to boot from another device, you will need
to disable Fail Safe Boot ROM. See the steps below for the method to disable it.
• Reset the system by either shutting it off and turning it on or by using the reset button.
• while the system is booting repeatedly press the DEL key to enter the BIOS setup.
• Choose INTEGRATED PERIPHERALS using the arrow keys and enter.
• Once in INTEGRATED PERIPHERALS set Fail Safe Boot ROM: Disabled
NOTE! By default, boards are shipped with fail safe boot ROM en-
able.
When Fail Safe Boot ROM is enabled the system will boot
to it exclusively.