From: cohen@GOMEZ.phys.virginia.edu
Subject: TI cables (do it yourself)
Reply-To: cohen@GOMEZ.phys.virginia.edu
Organization: Dept. of Physics, University of Virginia
Date: Thu, 8 Oct 1992 20:01:58 GMT

Note :  The following might be of some interest.  I have never found any
need to go through the drive cabling described here, though it may be
more reliable with touchy drives.

Keep in mind that many of the cables described here are in ample supply,
and may be purchased used (e.g., on this net) for less than the total
prices of the components.  However, the Do-It-Yourself feeling is unsurpassed!

*******************************************************************************
I take no responsibility for any of the infomation here.  It is supplied for
free, without any warranty of any kind...  :-)
*******************************************************************************

Incidentally, nobody seems to be interested so far in my offers- TI-99/4A
complete with RF modulator and User's Guide and 2 cartridges for $17, and
an Expansion Box with 32K memory expansion, disk controller, disk drive,
ready to hook up... for $85.
If nobody buys those, I won't be able to expand my setup...  :-(
Enjoy the freebies, anyway!
********************************************************************************

Article 55 of freenet.sci.comp.ti.news:
Newsgroups: freenet.sci.comp.ti.news
Subject: TI CABLES
Organization: Case Western Reserve Univ. Cleveland, OH (USA)
Orig-Date: Fri, 14 Oct 88 05:11:06 -0400

           WIRE IT YOURSELF
           ~~~~~~~~~~~~~~~~
      ALTERNATE DRIVE INTERFACES
      --------------------------
    Downloaded From DELPHI TI NET.
        submitted by Tom Burke
 
If you are thinking of adding  a  second
drive  to  your  system, and it is not a
T.I.  drive, it may or may not  work  by
connecting  it  to  the  external  drive
connector  on  the  back  of  the   Disk
Controller Card.
 
If  it  does  NOT  work  with  the  T.I.
recommended installation proceedure, try
this.....
 
You will need the following: An adequate
length of 34 conductor ribbon cable.  (2
to 3 feet)
 
1  - female 34 pin connector.  This will
connect to the  controller  card  inside
the P.E.  box.  Part #41-908 6C
 
 _________________
|.................|
|.................|
 -----------------
 
It should look something like this.  2 -
female 34 contact  edgecard  connectors.
Part #41-946
 
This  makes a total of three connectors.
The part #'s are from RESCO Electronics.
Use  the  crimp-on type connectors.  Put
part #41-908 6C on one end of the cable.
Plug   this  into  the  controller  card
inside the PE box.  Place the first edge
card  connector approx.  eight to twelve
inches from the controller card.   Crimp
it  on the cable.  Now you should loosen
the screw on the right, rear, top of the
outside of the PE box enough so that you
can slide the other end of the cable out
through  the  gap.   When  this is done,
plug  the  middle  connector  onto   the
internal  drive,  (don't  forget to plug
the power cable back on the drive),  and
put  the  drive  back  into  the PE box,
pulling the  excess  cable  through  the
gap.
 
DO  NOT INSTALL THE DRIVE PERMANENTLY AT
THIS TIME.  JUST LEAVE IT SIT IN THE PEB
 
Next, crimp the remaining  connector  on
to  the other end of the cable.  Bare in
mind that when you do put the connectors
on  the  cable, that the same wires must
be  connected  to  the   same   numbered
contacts  on  all three con- nectors.  (
e.g.   wire  one  goes  to  pin  one  on
connectors   1,  2,  3)  Plug  the  last
connector  onto  the   external   drive.
(contact  one  to  contact one, etc) Now
test the system.  You  may  or  may  not
have  to  remove the resistor from drive
#1.  Info on where the resistor is found
is in the Controller Manual.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     MAKE YOUR OWN CASSETTE CABLE
     ----------------------------
 
The  following  information  will enable
you to make  your  own  single  cassette
cable for your TI.  All parts are easily
obtainable from  Radio  Shack,  and  for
convenience  the part numbers are given.
All you need is a little skill and  time
to wire it up.
 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
J1,J2 1/8" plugs  274-287.....2 for 1.29
J3    3/32" plugs 274-281........... .99
J4    D-connector 276-1537......... 2.49
--    Hood for J4 276-1539......... 1.99
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
This is the diagram of the cassette port
located  on  the rear of the TI, next to
the power jack:
       1 2 3 4 5
     _____________   J4 is the
TI/99\ . . . . . /  female that
Cass. \ . . . . /  plugs into this
 Port  ---------  connection.
        6 7 8 9
J3=Cassette control (usually black)
J2=Microphone jack  (usually red)
J1=Earpiece jack    (usually white)
 
After  getting  all  the parts together,
wire the jacks one at a  time  with  two
conductor  wire.   Noting  that  J3 is a
micro-mini phono jack, while  the  other
two are regular mini phono jacks.
The  positive  connection  from  J3 will
connect to pin #1 on  the  D  connector,
and the ground goes to pin #2.
The  positive  connection  from  J2 will
connect to pin #5 on  the  D  connector,
and the ground goes to pin #3.
The  positive  connection  from  J1 will
connect to pin #8 on  the  D  connector,
and the ground goes to pin #9.
Connect   the   wire   number   to   the
appropriate part of the plug,  following
the above method.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 INTERFACE YOUR PRINTER TO YOUR MODEM
 ------------------------------------
Many  people  have asked how to have the
data that  is  coming  from  the  modem,
print  to their printer at the same time
it prints to their monitor.  This is not
hard,  if  you  have a serial interfaced
printer  and  it  does  work  with   the
following printers :
TI 99/4 IMPACT PRINTER
TI 810
EPSON PRINTER
GEMINI 10X
 
1-------------------1---------1
3----on/off---------2---------3
3---------2
20---------6
7-------------------7---------7
11------------------6---------20
 
PRINTER            RS232/C    MODEM
 
Some modems also connect pin 5 to pin 5.
Pin 11  on  the  T.I.   810  printer  is
called "REVERSE CHANNEL".  It is simular
to the pin 6 of the RS232/C.  Be sure to
set  the  printer's  baud  rate to match
that of your modem, (300 -  1200).   The
off/on  switch  permits you to pause the
printer.  Using  the  on  line/off  line
switch  on  the  printer will also pause
the modem.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
            PRINTER CABLES
            --------------
 
The following are  the  pin  connections
for  for a parallel interface (PIO) from
your RS232/C to your  parallel  port  on
your printer.
 
You will need the following:
-  An  adequate  length  of 16 conductor
   ribbon cable.
-  One  36  connection  male  Centronics
   connector.
-  One  16  connection  female  PIO port
   connector.
 
Wire the connectors together as follows:
 
PRINTER  SIDE      ||  PIO CONNECTOR
-------------------  ----------------
-------------------  ----------------
1--------------------1
2--------------------2
3--------------------3
4--------------------4
5--------------------5
6--------------------6
7--------------------7
8--------------------8
9--------------------9
10------------------11
11-15             not used
16------------------16
 
TAKE  NOTE:  For an Epson RX/80 printer,
you must wire pin 13 to PIN 13
 
ADDENDUM by Art Byers of the CW 99'ers
 
If your PIO cable made as above does not
work  properly,  try the pin connections
listed below.  they  are  taken  from  a
cable   supplied  by  Texcomp  as  being
specifically  for  TI  99/4A   and   PIO
printers  and  does  work very well with
the TI Impact Printer (which is an Epson
MX 80).
 
Printer      PIO CARD
 
1 thru 9 to 1 thru 9
11----------------10
19----------------11
         not used 12
13--------------- 13
         not used 14
         not used 15
16--------------- 16

*****************EOF********************