[stella] Severe Bug in PCAE discovered...

Subject: [stella] Severe Bug in PCAE discovered...
From: Manuel Polik <cybergoth@xxxxxxxx>
Date: Mon, 19 Nov 2001 23:53:12 +0100
Hi there!

When giving Gunfight its final touches, I stumbled 
across some very severe bug in PCAE, which I think 
everybody developing on this emulator should be aware 

There's a bug with SBC $$$$,X.
It is changing the ROM contents!
For example this simple loop:

                    LDX #$00
                    SBC $F000,X
			    BPL NextByte

Would not only change the accumulator as intended, but 
completely overwrite all F0XX bytes too!

There might occure other errors with other indirect 
addressing opcodes as well, I didn't test them all. 
(Just the one ruining Gunfight :-))


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