Big Woes, Little VI

[Frederique Vernhes]

I need some assistance with vi and SunOS4.1: I found that on my
workstation, ever since I installed 4.1, vi has been misbehaving in the
following manner:

1) Suppose I am down in the middle of a file and I use ^U to go back
   towards the top. Instead of scrolling the whole file up, it only updates
   the top line.

2) I try to Open a line above the first one, and it just writes over it on
   the screen, without scrolling stuff down. In reality, however, it does the
   correct thing, and a ^L will show that.

3) When I login over the phone with a modem, I use an IBM/PC running
   Xenix. In the past, I have found that I could use vi reasonnably well if I
   set my terminal to ansi. Actually, I still can edit reasonnably well with
   any Sun running SunOS 4.0.3. 

4) I have mapped (in my .exrc file) a few keys, some of which are function
   keys. I noticed that again, under 4.1, the function keys do not work,
   whereas if I rlogin to another Sparc running 4.0.3, they do work. (the
   .exrc file is the same since I use the same home directory on the two
   machines mentionned here.)

I checked the termcap entries for ansi terminals, and it seems the same.
Actually, it would not matter since vi now uses the terminfo library.
Does anyone knows what is going on? I must add that when I installed the
SunOS4.1, I selected sys V as optional software.