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From: inb300campbe@qut.edu.au
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga
Subject: New A1000 kickstart question
Message-ID: <14138.26d4fefc@qut.edu.au>
Date: 24 Aug 90 10:18:36 GMT
Organization: Queensland University of Technology
Lines: 22

Hello,

I have been developing a debugger that I plan to install as a debugger
in my boot-rom on my A1000 (only 8k out of 64k is used at the moment).
In the process I have attempted to test it by booting it as a kickstart.

It is now successfully running as a kickstart, but it took me a long
time to figure out that sector $201 on the kickstart disk must
remain identical to the normal kickstart disk.  Sector $201 maps
to location $ffff00.

If I boot my debugger with sector $201 all zeros, then custom chip
interrupts refuse to occur, but if I copy the sector from the 1.3
kickstart, the debugger runs fine.

What is the significance of the page of memory at $ffff00?  Are there
some sort of control locations there?  It isn't code anyway!

Thanks.
David Campbell

inb300campbe@redgum.qut.edu.au