Well, I wouldn't call this a bug, but it migh appear as one ...
Enter a short program:
Code: Select all
01 LBL 01
02 "ABCDEFGHIJKLMNO" (ie a full text-string)
03 +
04 END
Now, step through the program using "arrow up", and when line 02 is shown, step again while the line is still scrolling.
Depending on timing, how quick or for how long you press and the alignment of the planets, three things can happen:
- You end up on line 01 (expected - this is what we wanted)
- You are still on line 02 (normally no stepping is allowed while line is scrolling)
- And sometimes you end up on line 03 (ie [SST] was executed instead of [BST])
If you press [SHIFT] on a HP41 while the display is scrolling - the shift is ignored and the scrolling aborted and the text is rightaligned. And if not handled correctly on the DM41X, "arrow up" would always lead to a [SST], but there is some glitch that somtimes allows this to happen.
So if you time this right, pressing "arrow up" at the right time, you will never be able to backstep up to the beginning of the program - you will just jump between line 03 and 02 ... not likely but possible
Cheers,
Thomas