6800 Details

[joewing]

I'm using my own core. I've developed a fairly large test for it, though
there are still several instructions that need to be exercised more.
I got it to finally display the proper amount of free memory, though
it still doesn't want to work right... More testing
Of course the problem for a few things is that I don't know what the proper
behavior should be. The two 6800 instruction set listings I have been
using disagree on a few details:
ftp://ftp.comlab.ox.ac.uk/pub/Cards/txt/6800.txt
and
http://www.electronics.dit.ie/staff/...structions.htm

For example, one says CPX sets the carry flag, the other says it doesn't
(of course one also gives the same opcode for TAB and TBA).
Once I get everything working with the VT-320, PS/2 and VGA capabilities
certainly would be fun

Anyway, that System09 project looks pretty cool, I may have to load that
up and give it a try.