ORIGINALLY PUBLISHED IN LIMA NEWSLETTER JUNE 1989
 
          Pin diagrams 
 
          By: Andy Frueh  Lima, Ohio UG 
 
     I guess this article falls under the subject of "useless technical
information unless you are going to mess with your computers guts" (Whew!) 
These are pin diagrams I found.  All I copied down was the diagrams.  I don't
know where I got these from, but for the sake of common-interest, here they
are.  There is NO guarantee on any of these diagrams!  I accept no
responsibility for the consequences in using these to modify a console, or
whaterver else you do with these! 
 
PIN ASSIGNMENTS FOR SERIAL/PARALLEL CABLES 
     If you bought a printer cable not made
the TI, here is a guide to help you make
sure the pin assignments are right.
 
    Serial                    Parallel
//////////////             //////////////
TI     Printer             TI     Printer
1-9      1-9               1        1
10        11               2        2
16        16               3        3
P-Box     17               5        5
   grnd                    6        6
                           7        7
                           8        8
                           20      11
 
CASSETTE/JOYSTICK PIN ASSIGNMENTS 
     These run left-right with 1 thru 5 on the top and 6 thru 9 on the bottom. 
 
     Cassette                                Joystick
///////////////////////////////////     /////////////////////////////
1-CS1 motor +        6-CS2 motor +      1-Not used       6-Not used
2-CS1 motor -        7-CS2 motor -      2-Joystick 2     7-Joystick 1
3-Ground             8-Audio In         3-Up             8-Down
4-Not used           9-Audio Ground     4-Fire           9-Right
5-Record Out                            5-Left
 
POWER CABLE/DIN PLUG PIN ASSIGMENTS 
     These two are a pair that usually don't get modified, but here they are. 
 
   Power                                  DIN (Video)
////////////     (1) o       o (2)     | /////////////
1-Not used          (3) o  o (4)       | 1-12 Volt +              ^ (Notch) 2-8
2-8 Volt AC                            | 2-Video Out       (5)o       o(1)
3-16 Volt AC                           | 3-Shield
4-Ground                               | 4-Ground            (4)o   o(2)
                                       | 5-Sound Out
                                                               (3)o
 
 
I/O GROM PORT (MODULE SLOT) 
     The following are supplied by TI. 
 
     1-reset     7-d5   13-d2   19-+5 volt  25-dbin/mi   31-grom ready
     2-grnd      8-a15  14-a11  20-a8       26-a6        32-we
     3-d7        9-d4   15-d1   21-GROM sel 27-GROM clk  33-GROM ground
     4-cru clk  10-a13  16-a10  22-a7       28-a5        34-ROM ground
     5-d6       11-d3   17-d0   23-a13/mo   29--5 volt   35-ground
     6-cru in   12-a12  18-a9   24-a3       30-a4        36-ground
 
I/O PERIPHERAL PORT (P-Box)
     These are also from TI. 
 
     1-+5 volt   9-dbin   17-a7       25-ground  33-cru in  41-hold/iaq
     2-spch sel 10-a3     18-a9       26-we      34-d7      42-d3
     3-reset    11-a12    19-a15      27-ground  35-d4      43--5 volt
     4-ext int  12-ready  20-a2       28-mbe     36-d6      44-speech
     5-a5       13-load   21-ground   29-a6      37-d0
     6-a10      14-a8     22-cru clk  30-a1      38-d5
     7-a4       15-a13    23-ground   31-a0      39-d2
     8-a11      16-a14    24-0 3      32-memen   40-d1
 
 
     If you decide to use these for whatever, let me know what you come up
with!  I hope I helped someone out in someway.  Maybe these could help to
create new hard/soft ware, although I think these are probably published in
many technical books.  Oh well!  Happy probing! 
                                                          **DONE**