Serial pinout for the Playstation link port version 2 (UPDATED!)
  ================================================================

Hi PSX folks ! This is the updated version of my PSX serial-cable.

+----------------------------------------------------------------+
|  This one works 100% with SIOCONS (tested with 115200 baud) !! |
+----------------------------------------------------------------+

Do not use the old version of this file any longer !

------------------------------------------------------------------------------


                     Serial Port PSX
                   +-----------------+  
Par.Port ------>   | 1 2 3 4 5 6 7 8 |   ------> Cinch, MultiAV,...
                   +-----------------+   
                  (back of Playstation)    

Pin   Signal     Name     Direction
-----------------------------------
  1   RTS        PSXRTS   out
  2   GND        PSXGND   n/a
  3   DTR        PSXDTR   out
  4   CTS        PSXCTS   in
  5   TXD        PSXTXD   out
  6   DSR        PSXDSR   in
  7   +3.3V      PSXVCC   n/a
  8   RXD        PSXRXD   in

  All pins have 0...3.3V logic, so they need to be converted to -12V...+12V
  for V24. This can easily be done by the IC 'MAX232' (ICL232).


  Schematics:
  -----------
  Part list:   2 MAX232 or ICL232 voltage converter 
               1 IC 7400 (4 NAND)
               10 Capacitors 1uf (or higher) 16V
               1 male Sub-D-connector 25 pin

  Notice!
  -------

     |                                 |
    -X- = no cross connection         -+- = cross connection
     |                                 |


  Circuit:
  --------

                   +-----v-----+
               +---|1        14|-------* PSXVCC
   IC2(12) *---+   |           |    
               +---|2        13|---+
                   |           |   +---* IC3(9)
   PSXDSR  *-------|3        12|---+
                   |  IC 7400  |
               +---|4        11|-------* PSXCTS
   PSXRTS  *---+   |           |
               +---|5        10|---+
                   |           |   +---* PSXDTR
   IC3(10) *-------|6         9|---+
                   |           |
   PSXGND  *-------|7         8|-------* IC2(11)
                   +-----------+
                       IC 1


 PSXVCC  *----+                          +----+----*  PSXVCC
              |       +-------v-------+  |    | +
          +---X-------|1            16|--+   ===
        + |   |    +  |               |       |
         ===  +--||---|2            15|-------+----*  PCGND and PSXGND
          |           |               |
          +-----------|3            14|------------*  PCDTR
                +     |    MAX-232    |
          +---||------|4            13|------------*  PCDSR
          |           |               |
          +-----------|5            12|------------*  IC1(1/2)
             +        |               |
  PSXGND *----||------|6            11|------------*  IC1(8)
                      |               |
   PCTXD *------------|7            10|------------*  PSXTXD
                      |               |
   PCRXD *------------|8             9|------------*  PSXRXD
                      +---------------+
                            IC 2


 PSXVCC  *----+                          +----+----*  PSXVCC
              |       +-------v-------+  |    | +
          +---X-------|1            16|--+   ===
        + |   |    +  |               |       |
         ===  +--||---|2            15|-------+----*  PCGND and PSXGND
          |           |               |
          +-----------|3            14|------------*  (unused)
                +     |    MAX-232    |
          +---||------|4            13|------------*  (unused)
          |           |               |
          +-----------|5            12|------------*  (unused)
             +        |               |
  PSXGND *----||------|6            11|------------*  (unused)
                      |               |
   PCRTS *------------|7            10|------------*  IC1(6)
                      |               |
   PCCTS *------------|8             9|------------*  IC1(12/13)
                      +---------------+
                            IC 3 


   All capacitors are 1uF or higher - 16V
   Pay attention to the polarity of the capacitors (marked with a + next
   to each capacitor) !!!

   The MAX232 delivers -6V to +6V which is enough for driving PCs
   serial port.

   PC-side serial pinout (25 pin Sub-D male)
   -----------------------------------------

Pin   Signal     Name     Direction
-----------------------------------
   2   TXD       PCTXD    out
   3   RXD       PCRXD    in
   4   RTS       PCRTS    out
   5   CTS       PCCTS    in
   6   DSR       PCDSR    in
   7   GND       PCGND    n/a
  20   DTR       PCDTR    out


   This circuit acts like a REAL serial port like it is in your PC !!
   You need a NULL-MODEM cable to connect this circuit to your PC.
   DO NOT USE A STANDARD SERIAL CABLE !! 

   Use this circuit AT YOUR OWN RISK and please don't blame me if
   anything won't work or produces only smoke or noise :)

   Feel free to do what you want with this, but please e-mail me for good
   ideas, programs, hackings for the PSX (N64 too)....

   E-Mail: Mike_Bee@yahoo.com
   WWW   : www.geocities.com/SiliconValley/Lab/6332/
   ICQ   : 6760439