Section 8.7.2 of the standard (1.1) says:
There are two “windows”, called “upper” and “lower”: at any given time one of these two is selected.
for versions 4 and later, except 6. However, on a txd output of A Mind Forever Voyaging, I see
ERASE_WINDOW #ffff at address
How should this be interpreted?
Thanks for any pointers.