using the bootstrap loader

CONFIGURING THE FIRST STAGE
3.4.11 User-Supplied Drivers
If you want to bootstrap load your system from a device other than one for which Intel
supplies a first stage device driver, you must write your own device initialization and device
read device driver procedures that the first stage will call. Chapter 5 describes how to do
this. In addition, take the following actions to add the procedures to the Bootstrap Loader:
• Specify the names of the device initialization and device read procedures in a
%DEVICE macro in the BS1.A86 or BSIMB2.A86 file.
• If there are configurable parameters associated with your device (such as base
addresses or wakeup ports), you might want to create your own configuration macro
and include it in a special configuration file, just like the Intel devices do. Chapter 5
describes how to set up such a macro.
• Assemble your device initialization procedure, your device read procedure, and your
configuration file (if you have one), and link the resulting object code to the rest of the
Bootstrap Loader object files and libraries.
3-44 Bootstrap Loader