RELIANCE 45C204A Redundant input card

A delay follows this message so that you can abort the Autoboot process if you wish. Then the actual I/O begins: the program pointed to within the volume ID of the media specified is loaded into RAM and control passed to it. If, however, during this time you want to gain control without Autoboot, you can press thekey or the software ABORT or RESET switches. The Autoboot process is controlled by parameters contained in the ENV command. These parameters allow the selection of specific boot devices and files, and allow programming of the Boot delay. Refer to the ENV command description in Chapter 3 for more details.  Although you can use streaming tape to autoboot, the same power supply must be connected to the tape drive, the controller, and the MVME172LX. At power-up, the tape controller will position the streaming tape to the load point where the volume ID can correctly be read and used.

As shipped from the factory

 172Bug occupies an EPROM installed in socket XU2. This leaves one socket (XU1) and the Flash memory available for your use. Note You may wish to contact your Motorola sales office for assistance in using these resources. The ROMboot function is configured/enabled via the ENV command (refer to Chapter 3) and is executed at power-up (optionally also at reset). You can also execute the ROMboot function via the RB command, assuming there is valid code in the memory devices (or optionally elsewhere on the board or VMEbus) to support it. If ROMboot code is installed, a user-written routine is given control (if the routine meets the format requirements). One use of ROMboot might be resetting the SYSFAIL∗ line on an unintelligent controller module. The NORB command disables the function.

For a user’s ROMboot module to gain 

control through the ROMboot linkage, four conditions must exist: ❏ Power has just been applied (but the ENV command can change this to also respond to any reset). ❏ Your routine is located within the MVME172LX Flash/PROM memory map (but the ENV command can change this to any other portion of the onboard memory, or even offboard VMEbus memory). ❏ The ASCII string "BOOT" is found in the specified memory range.However, if the MVME172LX loses power but the controller does not, and the tape happens to be at load point, the necessary command sequences (attach and rewind) cannot be given to the controller and the autoboot will not succeed.

Professional seller

Professional sales of major electrical brand products in the world

Overseas direct purchase of products, authentic inventory, price concessions

After sales warranty, complete models, same products, different prices and services