rmhennin@watserv1.waterloo.edu (Roland M. Henning) (07/20/90)
Hi there,
I have a question concerning some AppleSoft Basic code.
The code runs on an Apple II+.
I would like to know exactly what the following code does:
vtab 9 : htab 1 : call -868
I am unfamiliar with this code but from the context I'm guessing that it
has to do with cursor postioning on the screen. If possible I would like
to know exactly what call -868 does. I understand that it is a machine
subroutine call but I don't know exactly what for.
Any comments are welcome.
I don't normally read this newsgroup but I will follow it for a while.
Email: rmhennin@watserv1.waterloo.edu or post if you feel it necessary.
Sorry to use up bandwidth.
Thanks.rond@pro-grouch.cts.com (Ron Dippold) (07/21/90)
In-Reply-To: message from rmhennin@watserv1.waterloo.edu
> vtab 9 : htab 1 : call -868
Wow! Does THAT bring back memories... That line clears line. The vtab 9
goes to line 9, htab 1 goes to line 1 (you probably knew that part!) If
memory doesn't fail me, call -868 clears to the end of the line from the
current position.
UUCP: crash!pro-grouch!rond
ARPA: crash!pro-grouch!rond@nosc.mil
INET: rond@pro-grouch.cts.comtiburon@mcshh.hanse.de (Tim Berndt) (07/24/90)
rmhennin@watserv1.waterloo.edu (Roland M. Henning) writes: >I would like to know exactly what the following code does: > vtab 9 : htab 1 : call -868 Well - the Cursor is set to (1,9) where (1,1) is the upper-left corner; then the Rest of that Line (Cursor and right of it) is ereased. Greatings Tim