I have been playing with the ctrl-T dialer in the LIST PLUS from
LIST74A and finally was able to get it to work (I have COM 2)!  The
'whatsnew' file shows the debug patch location and contents for COM1
and COM2.

  COM1 = F803    (which is what is shown at offset 0152 in LIST(p) 7.4A)
  COM2 = F802    (which works on my COM2 ATDT system!!)
  COM3 = E803
  COM4 = E802

  PCTOOLS is my patcher and there are some other shareware file edittors
out and about, but the following DEBUG commands should set COM 2 for you.
(Be sure to keep a copy of list.com safe before you do this:-))

  debug list.com
  -e 0152 F8 02
  -w
  -q

  Some folks also still have a PULSE dialing phone system instead of a
TONE phone.  You will want to change the ATDT embedded in LIST.COM to
ATDP for PULSE.

  debug list.com
  -e 015E 50
  -w
  -q

  To go back to TONE dialing, the original contents of 015E is 54
(54=T, 50=P).

  Now, this is for the 7.4A version of LIST.COM (List Plus) dated
8-8/9-90 ONLY.  Do NOT use these patches for other versions of LIST.

  The attached files COMMTWO and TONEDIAL.PAT can be used to run these
patches "automatically" if you don't want to type them in.
    Just do:   DEBUG < COMMTWO.PAT
          or   DEBUG < DIALPULS.PAT
     with LIST.COM in the same directory as the patch file.

  I have included COMMONE.PAT and DIALTONE.PAT to reverse the affects
of the other two .PAT files.  But if something goes wrong, you are
advised to just get a clean LIST.COM out of your LIST74A.ZIP again.

  Good luck, the dialer works great!!!