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model3.cpp: updated notes on DSB hardware (nw)

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src/mame/drivers/model3.cpp
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@ -92,11 +92,11 @@ Tilemap entry formats (16-bit wide):
are the palette select bits for 8bpp and PHI-T5 for 4bpp.
===================================================================================
Model 3 Hardware Overview.
Guru-Readme
Model 3 Hardware Overview
Sega, 1996-1998
This document covers all games running on the original Model 3 hardware and is produced with
This document covers all games running on the original Model 3 hardware with
reference to a Scud Race PCB and Virtua Fighter 3TB PCB. ALL PCB numbers are identical.
Scud Race runs on the original Sega Model 3 hardware. It's the same PCB as Virtua Fighter 3, there
is no mention of 'Step 1.5' or even 'Step 1.0' on any of the PCBs and there is no 50MHz or
@ -136,8 +136,6 @@ Virtua Striker 2
Virtua Striker 2 Version '98
[There is an external MPEG PCB used on some games but it was not available for documenting]
COMM Board
----------
171-7053B
@ -196,6 +194,30 @@ Notes:
if different, it's likely only for the games that use 64MBit MASKROMs.
ROMs - Not all sockets are populated. See MAME src for exact ROM usage.
(For dumping reference)
Jumpers centre pin joins
-------------------------------------------------------
JP3: 2-3 pin2 of ic 1 to ic 16 and pin 39 of ic 17 to ic 20
JP4: 2-3 pin2 of ic 1 to ic 16 and pin 39 of ic 17 to ic 20
JP5: 2-3 pin2 of ic 1 to ic 16 and pin 39 of ic 17 to ic 20
JP6: 2-3 pin2 of ic 1 to ic 16 and pin 39 of ic 17 to ic 20
JP7: 2-3 pin2 of ic 22 to ic 25 and pin 39 ic ic21
JP8: 2-3 pin32 of ic 22 to ic 25
JP9: 2-3 pin32 of ic 22 to ic 25
Jumper pos. 1 is +5V
JP1: 1-2 gnd
JP2: 2-3 +5v
Jumper pos. 1 is GND
Jumper pos. 3 is +5V
pin1 joins
-------------------------------
JP10: 1-2 pin32 of ic 26 to ic 41
All CROM ROMs are 32M MASK
ALL VROM ROMs are 16M MASK
CPU Board
---------
@ -317,12 +339,69 @@ Notes:
Other than the revision of the listed chips, the PCBs are identical.
External MPEG Audio Board
-------------------------
This is the first version of the Model 3 Digital Audio Board used
on Scud Race and is usually just mounted bare onto the outside of
the main board metal box.
Harley Davidson (Rev.A)
Sega, 1997
837-10084 DIGITAL AUDIO BD SEGA 1993
171-6614B PC BD
Sticker: 837-12941
|-------------------------------------------------|
| CN3 CN4 CN1 R RCA-1 CN2 RCA-2 |
| MB84256 PC910 4040 7805 TL062 TL062 D6376 |
| D71051 SM5840|
| EPROM.IC2 |------| |
| Z80 16MHz |NEC | |
| |D65654| |
| |--------| |------| |
| |SEGA | KM68257 |
| |315-5762| KM68257 |
| | | KM68257 MB84256 |
| 20MHz|--------| |
| |
| MB3771 JP1 JP2 MROM.IC57|
| 12.288MHz |
| MROM.IC58|
| |
| MROM.IC59|
| |
|DSW(4) G G G G MROM.IC60|
|-------------------------------------------------|
Notes:
Z80 - Clock 4.000MHz [16/4]
EPROM.IC2 - 27C1001/27C010 EPROM (DIP32)
- Scud Race : EPR-19612.IC2
MROM* - 8M/16M Mask ROM (DIP42)
- Scud Race : MPR-19603/04/05/06
MB84256 - Fujitsu MB84256 32kx8 SRAM (DIP28)
KM68257 - Samsung KM68257 32kx8 SRAM (DIP28). On this PCB pin 1 (A14) is grounded with a jumper wire on all 3 chips making it 16k
PC910 - Sharp PC910 Optocoupler (DIP8)
4040 - 74HC4040 logic chip
7805 - 12V to 5V Voltage Regulator
MB3771 - Fujitsu MB3771 Master Reset IC (DIP8)
TL062 - Texas Instruments TL062 Low Power JFET-Input Operational Amplifier (DIP8)
D71051 - NEC uPD71051 Serial Control Unit USART, functionally equivalent to uPD8251 (SOP28)
D65654 - NEC uPD65654 CMOS Gate Array (QFP100)
SM5840 - Nippon Precision Circuits SM5840 Digital Audio Multi-Function Digital Filter (DIP18)
D6376 - NEC uPD6376GS Audio 2-Channel 16-bit D/A converter (DIP16)
315-5762 - Sega custom chip, probably a NEC or Texas Instruments DSP or MCU, clock input 20MHz (PLCC68)
R - Red LED
G - Green LED
DSW - 4 position DIP switch, all OFF
JP1 - 1-2 (Select 16M ROM on bank 1 - IC57 & IC58). alt is select 8M
JP2 - 1-2 (Select 16M ROM on bank 2 - IC59 & IC60). alt is select 8M
CN1 - 10-pin power input connector
CN2 - 5-pin connector for Left+/Left-/Right+/Right- Stereo Audio Output
CN3 - 6-pin connector for MIDI TX+/TX-/RX+/RX- communication
CN4 - 4-pin connector (not used)
RCA* - Left/Right RCA Audio Output Jacks (not used)
This game runs on Sega Model3 Step2 hardware.
Sega Model 3 Step2 hardware
---------------------------
This covers most, if not all of the later MODEL 3 games on Step 2 & 2.1 hardware.
ROM Board
---------
@ -352,6 +431,8 @@ ROM Board
| |
|---------------------------------------------------------------------------------------------------|
Notes: (ROMs documented are for Harley Davidson)
VROM00.27 mpr-20378 \
VROM01.26 mpr-20377 |
VROM02.29 mpr-20380 |
@ -491,7 +572,7 @@ CPU Board
| CN25 |
| RTC72423 (Connector for ) |
| KM4132G271AQ-10 (Protection PCB) |
| ( not used ) |
| |
| 32MHz BATT_3V |
| NEC D71051-10 |
| |
@ -573,76 +654,68 @@ Security Board
315-6050 Lattice ispLSI 2032
315-5881 TQFP100 stamped 317-0247-COM for Spikeout FE
External MPEG Audio Board
-------------------------
This is the second version of the Model 3 Digital Audio Board used on
Sega Rally 2, Daytona USA 2 and others and is mounted inside a metal box.
837-12273 DIGITAL SOUND BD 2 SEGA 1995
171-7165D PC BD
Sticker: 837-12273-92
Sticker: 837-13376
|-------------------------------------------------|
| CN1 CN2 R CN5 CN6 LMC6484 CN7 |
|315-5932 D71051 PQ30RV21 7805 D63210 D63210 |
|PC910 R 12.288MHz |
| JP8 |
|68EC000 315-6028A |
| 33MHz |
|KM62256 * |
|KM62256 MCM6206 |
| MCM6206 JP4/5/6/7 |
| JP1/2/3 315-5934|
|3771 JP10 |
| JP9 |
| EPROM.IC2 |
| RGRG MROM.IC18 MROM.IC20 MROM.IC22 MROM.IC24 |
|DSW(4) MROM.IC19 MROM.IC21 MROM.IC23 MROM.IC25|
|-------------------------------------------------|
Notes:
68000 - Motorola 68EC000FN12 CPU, clock 11.000MHz [33/3] (PLCC68)
EPROM.IC2 - 27C1024 EPROM (DIP40)
- Sega Rally 2 : EPR-20641.IC2
- Daytona 2 : EPR-20886.IC2
MROM* - Mask ROM (DIP42)
- Sega Rally 2 : MPR-20637/38/39/40
- Daytona 2 : MPR-20887/88/89/90
KM62256 - Samsung KM62256 32kx8 SRAM (SOP28)
MCM6206 - Motorola MCM6206 32kx8 SRAM (SOP28)
PC910 - Sharp PC910 Optocoupler (DIP8)
7805 - 12V to 5V Voltage Regulator
PQ30RV21 - Sharp PQ30RV21 3.3V Voltage Regulator
MB3771 - Fujitsu MB3771 Master Reset IC (SOIC8)
315-5934 - GAL16V8 (PLCC20)
315-5932 - GAL16V8 (PLCC20)
LMC6484 - Texas Instruments LMC6484IM CMOS Quad Rail-to-Rail Input and Output Operational Amplifier (SOIC14)
D71051 - NEC uPD71051 Serial Control Unit USART, functionally equivalent to uPD8251 (SOP28)
D63210 - NEC uPD63210 16-bit D/A Converter with built-in Digital Filter for Audio (SOP28)
315-6028A - Sega custom chip, probably a NEC DSP, clock input 12.228MHz (QFP100)
* - Unpopulated position on bottom side of PCB for a NEC uPD77016 DSP. The Sega chip above may be similar to this
R - Red LED
G - Green LED
DSW - 4 position DIP switch, all OFF
JP1/2/3 - Jumpers to configure ROMs
JP4/5/6/7 - Jumpers to configure ROMs
JP8 - Jumper tied to pin 26 (IPL1) of MC68EC000
JP9/10 - Jumpers to configure ROMs, tied to GAL16V8 315-5934
CN1 - 6-pin connector for MIDI TX+/TX-/RX+/RX- communication
CN2 - 4-pin connector (not used)
CN5 - 10-pin power input connector
CN6 - 5-pin connector for Left+/Left-/Right+/Right- Stereo Audio Output
CN7 - 5-pin connector (not used)
===================================================================================
Scud Race
Sega, 1996
Tis game runs on Sega Model 3 Step 1.5 hardware
Sound Board (bolted to outside of the metal box)
-----------
PCB Layout
----------
PCB Number: 837-10084 DIGITAL AUDIO BD (C) SEGA 1993
---------------------------------------------------------------
84256 D71051GU-10 D6376 SM5840
epr-19612
Z80 16MHz SEGA D65654GF102
315-5762 (QFP100)
(PLCC68)
20MHz KM68257
KM68257 84256
KM68257
12.288MHz mpr-19603
mpr-19604
mpr-19605
DSW1 mpr-19606
----------------------------------------------------------------
Jumpers
JP1: 1-2 (Select 16M ROM on bank 1 - ic57 & ic58)
JP2: 1-2 (Select 16M ROM on bank 2 - ic59 & ic60)
ROM Board
---------
PCB Number: 837-11860 MODEL3 ROM BOARD (C) SEGA 1995
(For dumping reference)
Jumpers centre pin joins
-------------------------------------------------------
JP3: 2-3 pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP4: 2-3 pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP5: 2-3 pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP6: 2-3 pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP7: 2-3 pin2 of ic 22 to 25 and pin 39 ic ic21
JP8: 2-3 pin32 of ic 22 to 25
JP9: 2-3 pin32 of ic 22 to 25
Jumper pos. 1 is +5V
JP1: 1-2 gnd
JP2: 2-3 +5v
Jumper pos. 1 is GND
Jumper pos. 3 is +5V
pin1 joins
-------------------------------
JP10: 1-2 pin32 of ic 26 to 41
All CROM ROMs are 32M MASK
ALL VROM ROMs are 16M MASK
*/
/*
magtruck locations of interest
000006ee (word) - incremented each vblank, used by mainline to busywait.