[MAME]

Harley Davidson (Rev.A)
Sega, 1997

This game runs on Sega Model3 Step2 hardware.

COMM Board
----------

171-7053B  837-11861  NEP-16T MODEL3 COMMUNICATION BOARD
|---------------------------------------------------------------------------------------------------|
|                                                                                                   |
|   LATTICE                     NKK N341256SJ-20     NKK N341256SJ-20     NKK N341256SJ-20    40MHz |
|   PLSI 2032   JP3                                                                      JP1        |
|               JP4             NKK N341256SJ-20     NKK N341256SJ-20     NKK N341256SJ-20          |
|                                                                                             JP2   |
|                                                                                                   |
|   PALCE16V8                                                                                       |
|   315-6075A      68000FN12       315-5804             315-5917              315-5917              |
|                                  (QFP144)             (QFP80)               (QFP80)               |
|   PALCE16V8                                                                                       |
|   315-6074                                                                                        |
|                                                                                                   |
|---------------------------------------------------------------------------------------------------|
JP1: 1-2
JP2: 2-3
JP3: not shorted
JP4: shorted


ROM Board
---------

171-7427B  837-13022 MODEL3 STEP2 ROM BOARD
|---------------------------------------------------------------------------------------------------|
|                                                                                                   |
|        MC88915FN70                                     GAL16V8B                                   |
|    JP13                                                315-6090A  JP1  JP11  JP2           JP7 2-3|
|     2-3                                                           1-2  1-2   2-3           JP8 2-3|
|                                                                                            JP9 2-3|
| VROM01.26   VROM00.27    CROM03.1    CROM02.2                           SROM0.21                  |
|                                                                                                   |
| VROM03.28   VROM02.29    CROM01.3    CROM00.4                                                     |
|                                                                                                   |
| VROM05.30   VROM04.31    CROM13.5    CROM12.6     CROM2.18 CROM0.20         SROM1.22  SROM3.24    |
|                                                                                                   |
| VROM07.32   VROM06.33    CROM11.7    CROM10.8                                                     |
|                                                                                                   |
| VROM11.34   VROM10.35    CROM23.9    CROM22.10                                                    |
|                                                                                                   |
| VROM13.36   VROM12.37    CROM21.11   CROM20.12                                                    |
|                                                                                                   |
| VROM15.38   VROM14.39    CROM33.13   CROM32.14    CROM3.17 CROM1.19         SROM2.23  SROM4.25    |
|                                                                                                   |
| VROM17.40   VROM16.41    CROM31.15   CROM30.16                                                    |
|                                                                                                   |
|---------------------------------------------------------------------------------------------------|

VROM00.27 MPR-20378 \
VROM01.26 MPR-20377 |
VROM02.29 MPR-20380 |
VROM03.28 MPR-20379 |
VROM04.31 MPR-20382 |
VROM05.30 MPR-20381 |
VROM06.33 MPR-20384 |
VROM07.32 MPR-20383  \ 32MBit DIP42 MASK ROM
VROM10.35 MPR-20386  /
VROM11.34 MPR-20385 |
VROM12.37 MPR-20388 |
VROM13.36 MPR-20387 |
VROM14.39 MPR-20390 |
VROM15.38 MPR-20389 |
VROM16.41 MPR-20392 |
VROM17.40 MPR-20391 /

CROM00.4  MPR-20364 \
CROM01.3  MPR-20363 |
CROM02.2  MPR-20362 |
CROM03.1  MPR-20361  \ 32MBit DIP42 MASK ROM
CROM10.8  MPR-20368  /
CROM11.7  MPR-20367 |
CROM12.6  MPR-20366 |
CROM13.5  MPR-20365 /
CROM20.12 not populated
CROM21.11 not populated
CROM22.10 not populated
CROM23.9  not populated
CROM30.16 EPR-20412 \
CROM31.15 EPR-20411 |  16MBit DIP42 EPROM (27C160)
CROM32.14 EPR-20410 |
CROM33.13 EPR-20409 /

CROM0.20  EPR-20396A \
CROM1.19  EPR-20395A | 16MBit DIP42 EPROM (27C160)
CROM2.18  EPR-20394A |
CROM3.17  EPR-20393A /

SROM0.21  EPR-20397    4MBit DIP40 EPROM (27C4096)
SROM1.22  MPR-20373 \
SROM2.23  MPR-20374 |  32MBit DIP42 MASK ROM
SROM3.24  MPR-20375 |
SROM4.25  MPR-20376 /

The jumpers are used to configure the ROM types (All ROMs are 16 bit)
On Model 3 step 2.0 ROM boards, JP13 selects the size of the VROMs.
1-2 jumpered -> 16MBit (read as 27C160)
2-3 jumpered -> 32MBit (read as 27C322)

JP1, JP11 & JP2 seems to select the size of the CROMs. The jumpers are tied to +5V and ground and to PAL 315-6090A.
Many lines from the PAL are tied to the highest address line of the CROMs.
The contents of the PAL is unknown, so it's difficult to determine what the jumpers do exactly.
It's assumed the PAL does the size selection based on certain pins on the PAL being high or low which are set by the jumpers.
JP1  1-2 \
JP11 1-2 | Selects CROMs 00-03 & 10-13 as 32MBit
JP2  2-3 / and CROMs 30-33 as 16MBit
Alternative jumper configurations are not known.

JP7 selects the size of SROM0 (jumper pin 2 connected to pin 39(A17) of SROM0)
1-2 jumpered -> 1MBit (read as 27C1024)
2-3 jumpered -> 4MBit (read as 27C4096)

JP8 and JP9 seems to select the size of SROM1-4.
JP8 pin 2 is tied to pin 32 of SROM1-4 (highest address line A20)
JP9 pin 2 is tied to some logic.
JP8 & JP9 pin 3 are hardwired together.
JP8 and JP9 jumpered 2-3 selects SROM1-4 as 32MBit.
Alternative jumper configurations are not known.


CPU Board
---------

837-12715 171-7331C MODEL3 STEP2 CPU BOARD
|---------------------------------------------------------------------------------------------------|
| TC59S1616AFT-12  TC59S1616AFT-12                                                                  |
| (TSOP50)         (TSOP50)                                              GAL16V8D                   |
|                                                                        315-6089A                  |
| TC59S1616AFT-12  TC59S1616AFT-12                                       (PLCC20)                   |
| (TSOP50)         (TSOP50)                          45.158MHz        68000-12                      |
|                                                                     (PLCC68)                      |
|           MOTOROLA            PowerPC603ev                                      4066              |
|           XPC106ARX66CE       (QFP240,             SEGA             SEGA            TDA1386T      |
|           MPC106+               HEATSINKED)        315-5687 "SCSP"  315-5687 "SCSP"               |
|           (BGA304)                                 (QFP128)         (QFP128)              LMC6484 |
| PALCE16V8                                                                                         |
| 315-6102          33.333MHz                                                                       |
| (PLCC20)                     MPC950                HM514270CJ7      HM514270CJ7      TDA1386T     |
|                              (QFP32)                                                              |
|                                                                                                   |
| SEGA                            SEGA                                3771                          |
| 315-5894       SYMBIOS          315-5893                                                          |
| (QFP240)       53C810           (QFP240)                                                          |
|                (not populated)                                                                    |
|                                                                                                   |
|                                                    SEGA             SEGA       71AJC46A           |
|                                                    315-5296         315-5649   (SOIC8)            |
|                CY7C199          32MHz              (QFP100)         (QFP100)                      |
|                                                                                                   |
|                                                                                                   |
|                                                                                                   |
|                CY7C199                                                                            |
|                                                                             CN25                  |
|                                                    RTC72423             (Connector for )          |
| KM4132G271AQ-10                                                         (Protection PCB)          |
|                                                                         (   not used   )          |
|              32MHz                                 BATT_3V                                        |
|                          NEC D71051-10                                                            |
|                                                                                                   |
|              24.576MHz      SW1   SW2    LH52B256  LH52B256            DIPSW(8)   SW4    SW3      |
|---------------------------------------------------------------------------------------------------|


Video Board
-----------

837-12716 171-7332H MODEL3 STEP2 VIDEO BOARD
|---------------------------------------------------------------------------------------------------|
|                                                                                                   |
|  D4811650GF  D4811650GF                   33MHz   M5M4V4169  M5M4V4169  M5M4V4169  M5M4V4169      |
|                         D4811650GF                M5M4V4169  M5M4V4169  M5M4V4169  M5M4V4169      |
|                                              M5M410092FP                                          |
|                                              (TQFP128)                                  M5M4V4169 |
|                           SEGA                            SEGA                          M5M4V4169 |
|              SEGA         315-6058                        315-6060                                |
|              315-6057     (BGA)                           (BGA)                         M5M4V4169 |
|  SEGA        (BGA)                                                                      M5M4V4169 |
|  315-6022                                                                                         |
|  (QFP208)                KM4132G271AQ-10     SEGA                      SEGA                       |
|                          (QFP100)            315-6059                  315-6060         M5M4V4169 |
|                                              (BGA)                     (BGA)            M5M4V4169 |
|                                                                                                   |
|                                                                                                   |
|            M5M410092FP                       M5M410092FP                                M5M4V4169 |
|  SEGA      (TQFP128)                         (TQFP128)                                  M5M4V4169 |
|  315-6061              M5M410092FP                                                                |
|  (BGA)                 (TQFP128)                                                        M5M4V4169 |
|            M5M410092FP                                                                  M5M4V4169 |
|            (TQFP128)       M5M410092FP                                                            |
|                            (TQFP128)         SEGA                      SEGA             M5M4V4169 |
|     SEGA      M5M410092FP                    315-6059                  315-6060         M5M4V4169 |
|     315-5648  (TQFP128)      M5M410092FP     (BGA)                     (BGA)                      |
|     (QFP64)                  (TQFP128)                    SEGA                                    |
|                                                           315-6060                      M5M4V4169 |
|                                                           (BGA)                         M5M4V4169 |
|                                                                                                   |
|                                                                                         M5M4V4169 |
|                                                                                         M5M4V4169 |
|  ADV7120KP30                                                                                      |
|                                                                                                   |
|                                                                                                   |
|            M5M410092FP                       M5M410092FP                                M5M4V4169 |
|  SEGA      (TQFP128)                         (TQFP128)                                  M5M4V4169 |
|  315-6061              M5M410092FP                                                                |
|  (BGA)                 (TQFP128)                                                        M5M4V4169 |
|            M5M410092FP                                                                  M5M4V4169 |
|            (TQFP128)       M5M410092FP                                                            |
|                            (TQFP128)         SEGA                      SEGA             M5M4V4169 |
|     SEGA      M5M410092FP                    315-6059                  315-6060         M5M4V4169 |
|     315-5648  (TQFP128)      M5M410092FP     (BGA)                     (BGA)                      |
|     (QFP64)                  (TQFP128)                    SEGA                                    |
|                                                           315-6060                      M5M4V4169 |
|                                                           (BGA)                         M5M4V4169 |
|                                                                                                   |
|                                                                                         M5M4V4169 |
|                                                                                         M5M4V4169 |
|  ADV7120KP30                                                                                      |
|  (PLCC44)                                                                                         |
|                                                   M5M4V4169  M5M4V4169  M5M4V4169  M5M4V4169      |
|                                                   M5M4V4169  M5M4V4169  M5M4V4169  M5M4V4169      |
|                                                                                                   |
|---------------------------------------------------------------------------------------------------|

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