how to scroll back during boot

[Adam Myrow]

It's supposed to be shift plus page-up, but I don't think Speakup pays any
attention to this.  I know that Brltty does, however.  This doesn't help
in a kernel panic situation, though.  The good news is that the error that
caused the panic is usually still on screen as it doesn't take long from an
error condition to the panic.  What is the panic you're getting anyway?