Subject: Re: z50 lockup on screenblank
To: None <port-hpcmips@netbsd.org>
From: Carl Wilhelm Soderstrom <chrome@real-time.com>
List: port-hpcmips
Date: 09/26/2001 14:19:13
> : 	is the address that it calls, completely hard-wired in? is it
> : something sensible (like the last addressible piece of memory); or something
> : that needs to be changed every time you put a new wince ROM in? what
> : actually decides the address? is it on the ROM board itself, or some other
> : chip? 
> : 	any hope of hardware-hacking it?
> 
> I haven't disassembled the code that is at this location in the ROMs,
> so I don't know for sure what it does, or how hard it would be to
> hack.  Likely it is a jr into some fix address in RAM, but it could
> also be something much more elaberate...

if it's jumping to a fixed address in RAM, can NetBSD reserve that tiny bit
of memory somehow (somehow mark it as 'fixed') so some code there can
trap/redirect jumps to it? (sort of like a DOS TSR?)
	or is there another way to do it?
	am I way out of my league here? ;>

Carl Soderstrom
-- 
Network Engineer
Real-Time Enterprises
(952) 943-8700