/*****************************************************************************

Namco NamCam
------------

/------------------------\
|   NAMCO          /---\ |
|                  | O | |
|  NAMCAM          \---/ |
\------------------------/

This is a CCD camera used on Gunmen Wars and Race-On and is
mounted into the upper bezel above the monitor in front of the
player. Both games run on Namco Super System 23 hardware.
The camera has a 5 pin connector. That connector is wired to
a 6 pin connector J6 on the V198 EMI PCB on the outside of the metal
box housing the Super System 23 game boards.
The pinout of J6 is...
1 - +5V
2 - GND
3 - VIDEO (color composite video)
4 - GND
5 - NO CONNECT
6 - SCREEN (just tied to GND on the PCB)
Connector J6 eventually connects to the GMEN board to the VPX-3220 IC.

When the game is started the game takes a snapshot of the
player's face which is added on top of the game graphics by
the GMEN PCB.
If the NamCam is not connected the game will hang near the end of
the SH2 initialisation/loading and will not go in-game. If the
camera works enough to get the game booted but doesn't work in-game
the board will hang on the 'taking the photo' screen then eventually
reboot. The camera PCB is made by Toshiba.
The PCB is mounted to the underside of the NamCam.

PCB Top Side
------------

TOSHIBA
PB7408
70177778A
TW10794V-0
767 13604 (sticker)
|--------------------------------|
|        |-------|19.069MHz      |
|        |TOSHIBA|       CCD_CAM |
|        |TC90A22AF              |
|P001    |-------|  93C45A       |
|--------------------------------|
Notes:
TC90A22AF - Toshiba TA90A22AF CCD Camera Digital Signal Processing IC (TQFP80)
   93C45A - 93C45A (TSSOP8) EEPROM, connected to TC90A22AF on pins 59-64.
            pin 58 is NTPA and is grounded so the camera is set to NTSC mode.
            The eeprom holds camera setting data, brightness, contrast etc.
  CCD_CAM - This is the actual CCD sensor and lens
     P001 - 5-pin connector that joins to the V198 EMI PCB


PCB bottom Side
---------------
                    Note: This area has many tiny diodes, inductors, transistors,
TOSHIBA             capacitors etc, most can't be identified to period-correct
PB7408              manufacturers due to undocumented SMD codes.
70177778A            /----/\----\
TW10794V-0          /            \
|--------------------------------|
|             5W01  1R33  GY     |
|        TA1283FN        3800    |
| D16510             00DM   LY   |
|              X2 LY        800mA|
|--------------------------------|
Notes:
  D16510 - NEC uPD16510 Vertical Driver for CCD Sensor (TSSOP20)
TA1283FN - ? Made by Toshiba (TSSOP24)
    3800 - ? possibly an op-amp made by New Japan Radio Co. (i.e. JRC3800?) (TSSOP8)
    1R33 - Sharp PQ1R33 Voltage Regulator (SOIC6)
      X2 - ROHM EMX2 Dual General-Purpose NPN Transistor
      LY - Probably a transistor (SOT23)
      GY - Probably a transistor (SOT89)
    00DM - ? (SOT523)
    5W01 - ?. Possibly ST Microelectronics ST25W01 128 x8-bit Serial EEPROM (connected to TA1283FN) (TSSOP8)

*****************************************************************************/