HP 50g Binary Number Formatting

[Gil]

It seems that, with the program suggested by John Keith, the 4 digits-block starts from the left.
So that we get with his program:
1234 5678
1234 5678 9
1234 5678 91
1234 5678 912

But I understood that we should get:
123 4567 8912
12 3456 7891
1 2345 6789
1234 5678

Besides, John Keith's program seems to cut off the first and last digits.

But really a great idea to play with the stack, not using — at all — intermediary variables.

Regards,
Gil