mark@digi-g.UUCP (Mark Mendel) (10/20/84)
I discovered this bug in Heath. emulation in KERMIT for IBM-PC while using
vi on unix. Vi now works just fine. I have included a termcap for
kermit's emulator at the end of this article.
Symptom:
A DELLIN command (^[M) on the last line of the window would scroll
the status line into the window and place the cursor on the status line.
Fix:
A DELLIN on the last line should merely clear the line.
-- In MSYIBM.ASM replace:
dellin1 mov ch,dh ; start at current row
xor cl,cl ; column 0
mov dx,low_rgt
; mov dx,174fh ; to bottom of screen
mov ah,6h ; scroll up.
mov bh,curattr ; attribute
int screen
ret
-- with:
dellin1:xor dl,dl ;Always start at first column.
cmp dh,byte ptr low_rgt+1
jg nodel ; ignor if past end of window.
je clreol ; clear line if AT end of window.
mov ch,dh ; start at current row
xor cl,cl ; column 0
mov dx,low_rgt
; mov dx,174fh ; to bottom of screen
mov ah,6h ; scroll up.
mov bh,curattr ; attribute
int screen
nodel: ret
-- The termcap:
km|kermit|kerm|kermit heathkit emulation:\
:bs:cd=\EJ:ce=\EK:cm=\EY%+ %+ :co#80:li#24:nd=\EC:\
:pt:sr=\EI:up=\EA:ku=\EA:kd=\EB:kr=\EC:kl=\ED:\
:cl=\EE:al=\EL:dl=\EM:dc=\EN:im=\E@:ei=\EO:\
:so=\Ep:se=\Eq:am:xt:\
:is=\Ev:\
:rs=\Ev:
-- Mark Mendel
-- ...ihnp4!umn-cs!digi-g!mark