Date   : Mon, 25 Mar 1996 20:05:27 +0000 (GMT)
From   : Chris Rae <clr1@...>
Subject: BBC: Debugging info needed - can anyone help?

I now have a fair proportion of the BBC instruction set implemented, tho 
how much of it is working is anyone's guess. The way I've done it is just 
to get the emulator to boot into the O/S and implemented any instructions 
it came across that I haven't done yet.

Well, I've got 1400 instructions into the OS and now it's trying to 
execute opcode 3 - which doesn't exist. From this I could guess that 
something's gone wrong somewhere!

What I'd like, if anyone has it or could easily generate it, would really 
help me. I'm after the state of the BBC flags after, say, ever 10 
instructions executed by the O/S. This would give me a fantastic idea of 
where I've gone wrong.

If anyone has these or could make them, I'd be your biggest fan. :-) 
Other than that it's a case of going through every instructions trying to 
see if it was working.

Here's hoping,

Chris

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The Free Press: http://www.st-and.ac.uk/~www_sa/personal/clr1/freepres
TOL (a BBC Master emulator for UNIX which... err... doesn't work yet):
http://www.st-and.ac.uk/~www_sa/personal/clr1/tol