Romboot; Romboot Sequence - Motorola MVME187 Installation Manual

4. Following this message there is a delay to allow you an
5. Then the actual I/O begins: the program pointed to within
Autoboot 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 in Appendix A for more details.

ROMboot

There are two spare EPROM sockets, XU3 and XU4, available to
carry user-programmed EPROMs. Therefore, you do not have to
reprogram the 187Bug EPROMs in order to implement the
ROMboot feature.
One use of ROMboot might be resetting SYSFAIL* on an
unintelligent controller module. The NORB command disables the
function.

ROMboot Sequence

1. ROMboot is configured/enabled and executed at powerup
2. If ROMboot code is installed, a user-written routine is given
opportunity to abort the Autoboot process if you wish. To
gain control without Autoboot, you can press the
or the software
ABORT
the volume ID of the media specified is loaded into RAM and
control passed to it.
(optionally also at reset) in one of two ways:
a. By the Environment (ENV) command (refer to
Appendix A)
b. By the RB command assuming there is valid code in the
EPROMs (or optionally elsewhere on the module or
VMEbus) to support it.
control (if the routine meets the format requirements).
Booting and Restarting 187Bug
or switches.
RESET
key
BREAK
4
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