20行でできる、端末版vimの縦分割スクロール高速化設定 ref: http://qiita.com/kefir_/items/c725731d33de4d8fb096

file0.txt

" Use vsplit mode
if has("vim_starting") && !has('gui_running') && has('vertsplit')
  function! EnableVsplitMode()
    " enable origin mode and left/right margins
    let &t_CS = "y"
    let &t_ti = &t_ti . "\e[?6;69h"
    let &t_te = "\e[?6;69l\e[999H" . &t_te
    let &t_CV = "\e[%i%p1%d;%p2%ds"
    call writefile([ "\e[?6;69h" ], "/dev/tty", "a")
  endfunction

  " old vim does not ignore CPR
  map <special> <Esc>[3;9R <Nop>

  " new vim can't handle CPR with direct mapping
  " map <expr> ^[[3;3R EnableVsplitMode()
  set t_F9=^[[3;3R
  map <expr> <t_F9> EnableVsplitMode()
  let &t_RV .= "\e[?6;69h\e[1;3s\e[3;9H\e[6n\e[0;0s\e[?6;69l"
endif