[Apr/04/2004]

Space Fever (3 sets, Space Fever?, High Splitter?, Space Launcher?)
Nintendo, 1979

Note: These are all simple ROM swaps on a standard b/w Space Fever PCB.


PCB Layouts
-----------

Top Board (Sound PCB)

TSF-SOU
|----------------------------------------------------|
|                                 VR3    VR2    VR1  |
|  8035                    74123                     |
|                 74275                              |
|  6MHz                                              |
|                          74123         SN76477     |
|  SF_SOUND.IC2   74275                              |
|                                                    |
|                          7405                      |
|                                                    |
|----------------------------------------------------|

Notes:
      All IC's shown.
      There is no AMP on the PCB, sound amplification is done via a small external AMP board.
      ROM IC2 is a 2708 EPROM.
      VR1: master volume
      VR2: shoot volume
      VR3: music volume
      8035 clocks: pins 2 and 3 measure 6.000MHz 
                   pin 9 measures 399.256kHz
                   pin 12 measures 200.0kHz
                   pin 13 measures 105.0kHz
                   pin 21 measures 399.4Khz
                   pin 22 measures 400.0kHz
                   pin 23 measures 399.3kHz
                   pin 24 measures 399.3kHz
                   pin 39 measures 61.5627Hz
      

Middle board
------------

TSF-I/O  PI-500803
|----------------------------------------------------|
|                                                    |
|     VR1                                            |
|                     20.160MHz                      |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                     DSW1(8)                        |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|----------------------------------------------------|
Notes:
      VR1: adjusts brightness
      Board contains mostly logic ICs (not shown)
      Video output is b/w, the harness is wired to a JAMMA fingerboard but only blue is used.
      

Bottom board
------------

TSF-CPU  PI-500802
|----------------------------------------------------|
|                                                    |
|                                                    |
|                                                    |
|             SF_F1.F1  SF_G1.G1  SF_H1.H1  SF_I1.I1 |
|                                                    |
|   8080                                             |
|                                                    |
|             SF_F2.F2  SF_G2.G2  SF_H2.H2  SF_I2.I2 |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|                                                    |
|     4116  4116  4116  4116  4116  4116  4116  4116 |
|----------------------------------------------------|

Notes:
      All ROMs are 2708, 1K x8
      4116: 2K x8 DRAM
      8080 clock: 2.0160MHz (20.160 / 10)
      Sync: no V reading, H is 15.57kHz
      
      Set 1 is on the PCB and is complete.
      Some ROMs in set1 match the current sfeverbw set.
      
      The other two sets were supplied as just EPROMs.
      Set2 (maybe High Splitter) is missing the ROM at location I2. Might be missing, or maybe
      just the program is smaller and the extra ROM was not required. Either way, I don't have
      that ROM and probably never will (i.e. don't bother asking about it, I can't help)
      
      Also, I don't know which ROMsets are which game. They're correctly grouped in the zips
      but the labels are written in Japanese so I have no idea which is which. 
      If the sets are named incorrectly, just swap the names once they're figured out.
  
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