Date   : Fri, 13 Mar 1998 21:45:22 +0100
From   : "Mark Usher" <marku@...>
Subject: Re: Master OS

Thanks to David, Tom and Rich

DG>Its still c000-ffff; with a whole at sheila/jim/fred which can
DG>be closed (i.e. you can read the ROM if you are clever).

That was my next question. If you remember I was having problems reading it
directly out of the chip, so what would be the easiest way to read it out of
memory. I bet you can guess the use it will then be put to :-)

R>Also I seem to remember that most of the time, the bit of OS between &C000
R>and &DFFF was usually mapped out and replaced by 8k of RAM.  To get at it
R>(I think it contained all the graphics routines) you had to do some weird
R>fiddling with the paging register at &FE34, though I can't remember which
R>bit controlled it for the life of me.

Saving the other built in ROMs is easy and then I'll just have to copy
together the images.

Mark