Progress? Who knows....

Here's another little test app and this one's pretty simple, but it does show up the flaw.

58C9  CE 15 FF      dec $FF15
58CC  EA            nop   
58CD  EA            nop   
58D0  00            brk   
58D1  EA            nop   
58D4  EA            nop   
58D5  4C C9 58      jmp $58C9

Now on entry to the debugger I adjust the stack to point to the BRK instruction so that we know exactly where its stopped. This works fine. But on exit I expect it to re-execute the BRK and not do anything, however this one does not. When I run it again the screen colour changes, and its not supposed to. I suspect this is the problem, BRK's are not being restarted properly, but at least now I have a test case, I should manage to fix it easily enough - I think.