[Oct/17/2000]

E-Jan High School (JPN Ver.)
(c)1996 Seibu

SPI system

SXX2C ROM SUB
Custom:	SEI252


E-JAN3_1.211  prg.
E-JAN3_2.212
E-JAN3_3.210
E-JAN3_4.29

E-JAN3_7.216  samples(?)
EJ3_PCM1.215  samples

EJ3_OBJ1.322  OBJ chr.
EJ3_OBJ2.324  (encrypted?)
EJ3_OBJ3.323

E-JAN3_6.413  BG chr.
E-JAN3_5.48   (encrypted?)
EJ3_BG1D.415
EJ3_BG1P.410
EJ3_BG2D.416
EJ3_BG2P.49


Dumped 10/18/2000

-

[MAME]

E-Jan High School        (All Mask ROMs stamped '       ')    //todo
                         Filename     ROM Type
                         ------------------------------------
                         OBJ-1.U0322  23C3210 (SOP44 MaskROM)
                         OBJ-2.U0324  23C3210 (SOP44 MaskROM)
                         OBJ-3.U0323  23C3210 (SOP44 MaskROM)
                         BG-1D.U0415  23C1610 (SOP44 MaskROM)
                         BG-2D.U0416  538000  (SOP32 MaskROM)
                         BG-1P.U0410  538000  (SOP32 MaskROM)
                         BG-2P.U049   534000  (SOP32 MaskROM)
                         PCM-1.U0215  538000  (SOP32 MaskROM)
                         1.U0211      27C2001 (DIP32 EPROM)
                         2.U0212      27C020  (DIP32 EPROM)
                         3.U0210      27C020  (DIP32 EPROM)
                         4.U029       27C2001 (DIP32 EPROM)
                         5.U048       27C512  (DIP28 EPROM)
                         6.U0413      27C1024 (DIP40 EPROM)
                         7.U0216      27C040  (DIP32 EPROM)



SXX2C ROM SUB
-------------------------------------
|     *                       *     |
|+BG2-P.U049    5.U048  BG-1D.U0415 |
|                                   |
|      *                       *    |
| BG-1P.U0410  6.U0413  +BG2-D.U0416|
|                                   |
|    |-------------------------|    |
|    |-------------------------|    |
|                                   |
| 5816                              |
|         |------------|            |
|         |            |     *      |
|         |            |OBJ-3.U0323 |
| 5816    |  SEI252    |            |
|         | SB05-106   |            |
|         |            |            |
|         |            |            |
| 5816    |------------|            |
|                                   |
|                *           *      |
|           OBJ-2.U0324 OBJ-1.U0322 |
|                                   |
|                                   |
|    |-------------------------|    |
|    |-------------------------|    |
|                                   |
|                                   |
| 3.U0210     2.U0212       1.U0211 |
|                                   |
|                *                  |
| 4.U029    PCM-1.U0215     7.U0216 |
|                                   |
-------------------------------------
Notes:
*     : These ROMs are surface mounted
+     : These ROMs not populated on some games
5816  : SONY CXD5816SP-12L SRAM (x3)
SEI252: SEIBU custom stamped 'SEI252 SB05-106' (QFP208)


Main Board Layout
-----------------
Revision 1
(C)1995 SXX2C-MAIN V2.0

Revision 2
(C)1998 SXX2C-MAIN V2.1
|-----------------------------------------------------------------------------|
|                  CN121       E28F008SA           XC7336(1)        Z80       |
|                                    E28F008SA                                |
|                      JP072                                                  |
|  VOL_L  VOL_R                                                               |
|                4560      |--------|            LH5496D-50                   |
|            4560    4560  |YMF271-F|                              XC7336(2)  |
|                          |        |16.9344MHz  LH5496D-50                   |
|              YAC513-F    |        |                                         |
|                          |--------|                                         |
|            JP121                                           PAL3  TC551001   |
|                                                                             |
|--|                                   |-------------------------| TC551001   |
   |                                   |-------------------------|            |
|--|       |------|                                                           |
|          |SIE150|       61256                                               |
|          |      |                                                           |
|          |------|       61256               |---------|     TC551664BJ-15   |
|                                             |SEI400   |                     |
|                                             |SB07-3460|      *              |
|J                                            |         |                     |
|A                                            |         |                     |
|M                                            |---------|     TC551664BJ-15   |
|M         JP071                                                              |
|A                                        PAL1        61256                   |
|                                                              *              |
|                                         PAL2        61256                   |
|                                                                             |
|                          28.63636MHz |-------------------------|            |
|                                      |-------------------------|            |
|--|                                                                          |
   |      BATT_3V              |---------|        |-------|        PAL4       |
|--|                           |SEI600   |        |AM386DX| 50MHz             |
|                              |SB08-1513|        |       |                   |
|            32.768kHz         |         |        |-------|                   |
|           DS2404S            |         |                                    |
|                              |---------|                                    |
|                                                                             |
|-----------------------------------------------------------------------------|
Notes:
     AM386DX   - Advanced Micro Devices AM386DX/DXL-25 (QFP132), running at 25.000MHz [50/2]
                   - Replaced with Intel NG80386DX25 on Revision 1 PCB
     Z80       - Zilog Z84C0008PEC (DIP40), running at 7.15909MHz (28.63636/4)
     YMF271-F  - Yamaha YMF271-F running at 16.9344MHz
     E28F008SA - Intel E28F008SA 8MBit FlashROM (TSOP40)
                   - Replaced with Sharp LH28F008 on Revision 1 PCB
     XC7336(1) - Xilinx XC7336 CPLD (PLCC44, stamped 'MCTL02')
     XC7336(2) - Xilinx XC7336 CPLD (PLCC44, stamped 'MCTL03')
     TC551001  - Toshiba TC551001 128K x8 SRAM (SOP32)
                   - Replaced with Toshiba TC518128 on Revision 1 PCB
     61256     - 32K x8 SRAM (DIP28)
                   - Replaced with Sony CXK5863BP-30 on Revision 1 PCB
     TC551664  - Toshiba TC551664BJ-15 64K x16 SRAM (SOJ44)
     LH5496D-50- Sharp LH5496D-50 Asynchronous FIFO (DIP28)
     DS2404S   - Dallas DS2404S EconoRAM Time Chip (SOIC16)
     PAL1      - ICT PEEL18CV8 (DIP20, stamped 'SXX005-5')
     PAL2      - ICT PEEL18CV8 (DIP20, stamped 'SXX011B')
     PAL3      - Lattice GAL16V8D (DIP20)
                   - Stamped 'MCTL01' on Revision 1 PCB
                   - no Seibu markings on Revision 2 PCB
     PAL4      - Advanced Micro Devices PALCE20V8H (no Seibu markings, DIP24)
                   - Replaced with ICT PEEL18CV8 (DIP20, stamped 'SXX010B') on Revision 1 PCB
     3V_BATT   - 3 Volt coin battery CR2032 for use with DS2404S
     JRC4560   - Japan Radio Co. JRC4560 Op Amp IC (DIP8)
                   - All 3 IC's replaced with a custom ceramic SIL module stamped 'HB-46A1' on Revision 1 PCB
     YAC513-M  - Yamaha YAC513-M DAC (SOIC16)
     JP072     - Jumper used when swapping game board cartridges
     JP071     - Slide Switch to flip screen
     JP121     - Jumper to set sound output to mono or stereo
     CN121     - Output connector for left/right speakers
     *         - Unpopulated position for Toshiba TC551664BJ-15 64K x16 SRAM



This system (known as 'SPI') consists of a main board and a plug-in
cartridge containing the game software. The games on SPI hardware can
be swapped by changing the top cartridge and then moving jumper JP072
to the alternative position. This re-flashes some ROMs for a few minutes
(accompanied by a techno music track). Afterwards, a message tells you to
put the jumper back to the original position and reboot the PCB. The new
game then plays.

There were a few revisions of this hardware, though most are the same with only
minor changes such as different IC revisions etc.

-