why don't emulators such as the DM41X and V41 display the synthetic geese?

[dmh]

I've just tested this fix on the px41c and it works - I can see forward and backward geese now :-)

Thanks to Thomas for the quick and thorough analysis to find the issue and thanks to Alex for quickly applying the fix to test.

Hopefully this can now be replicated in all the emulators.

I wonder if this special case needs to support A through F and not just F. It may never actually occur in real life though. Thomas, would it be easy for you to test these as well?

(03-28-2024 12:03 AM)agarza Wrote:  

(03-27-2024 07:07 PM)ThomasF Wrote:  When A[MS] = F and we execute A=A-1 [MS], the carry is set and A[MS] is changed to 8.

If my assumption is correct, I thinbk this answers the original question ...

Thomas

Thomas, You are Correct!!!

I just did a quick and dirty patch for A=A-1, when A[MS] = F and in decimal arithmatic to force A[MS]=8.

Now I can see the goose (left and right).