Oops, bad of me, I’ve been so very slow to respond!
Did we consider the possibility of swapping of the two co-ordinate bytes, and the effect that might have? I’ve forgotten what I learnt about the item table data format yet again, so I’ll have to learn it for the umpteenth time! :-)
Edit: have just checked the item table in the SkoolKit disassembly and it seems all 65,536 pairs of co-ordinate bytes would have a valid meaning, so I think I really had just failed to consider that possibility! We shall have to find out where the dodgy items would end up if their co-ordinate bytes were swapped. :-)
Not as slow as this response has been, Stuart!
Now that I've got my head around how the Item Table works, I think I can respond to the above query: if you were to swap round the two 'item definition bytes' of one of the double-items on The Beach, it would end up in Room 54 (West Wing), at coordinate (13, 26) - which would leave it imbedded in an Earth cell near the bottom-right corner of that room. So we can rule that out!
Did you see whether it would fit well in any particular rooms if the object is moved eight squares up? (It can be moved to a different room and moved eight squares up with only a single poke.)
I remember I looked a while ago for a suitable location for the beach 'double' (using the same co-ordinates) but there were not that many suitable places surprisingly. As you've just re-mentioned I think the Y is likely off one block.
I'm assuming by this one 'square' ie 8x8 pixels rather than 8 blocks (that would probably leave very few choices)
Responding to Andy's point (again, rather late in the day!), I think Stuart was meaning 8 blocks above rather than 8 pixels/1 block - because the same ('upper') byte that stores the item's room number, also tells you which half of the room it is located in (i.e. top half or bottom half). So there are two locations on the screen which share the same 'lower byte', and they are separated vertically by eight cell-rows.
Therefore, to complete the exercise (if anyone's still bothered!?), you'd have to go around the layout trying to place an item at coordinates (5,22) - the sixth cell-row down from the top, and the 23rd cell-column in from the left (because coordinates are counted starting from 0) - and see if anywhere looks sensible?
(I wonder if it would give Dr Jones' elephant a second tusk?)
Edited by IRF, 31 October 2016 - 11:40 AM.