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battlera.cpp: added Guru-Readme(tm)(c)(r) for Battle Rangers (nw)

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Guru 2015-12-13 07:52:05 +08:00
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src/mame/drivers/battlera.cpp
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@ -7,17 +7,88 @@
Emulation by Bryan McPhail, mish@tendril.co.uk
This board is a modified PC-Engine PCB, differences from PC-Engine console:
This board is based on the Hudson HuC6280 and Huc6270 IC's used in
the NEC PC-Engine.
Differences from PC-Engine console:
Input ports are different (2 dips, 2 joysticks, 1 coin port)
_Interface_ to palette chip is different, palette data is the same.
Extra sound chips, and extra processor to drive them.
Twice as much VRAM.
_Interface_ to palette is different (Huc6260 isn't present),
palette data is the same.
Extra sound chips (YM2203 & Oki M5205), and extra HuC6280 processor to drive them.
Twice as much VRAM (128kb).
Todo:
- There seems to be a bug with a stuck note from the YM2203 FM channel
at the start of scene 3 and near the ending when your characters are
flying over a forest in a helicopter.
flying over a forest in a helicopter.
This is verified to NOT happen on real hardware - Guru
**********************************************************************
Battle Rangers / Bloody Wolf
Data East 1988
This game runs on custom Data East hardware using some of the ICs used in
the NEC PC Engine video game console made by NEC in 1987.
The PCB is NOT a modified PC Engine, it's a game-specific arcade PCB
manufactured by Data East.
PCB Layout
----------
DE-0314-2
|-----------------------------------------------|
|-| |----| |
| |DEC-01 ET10-.L3 |
|J |----| ET09-.L1|
|A DSW2 |
|M DSW1 |
|M RCDM-I1 ET08-.J5 |
|A RCDM-I1 ET07-.J4 |
| RCDM-I1 ET06-.J3 |
| RCDM-I1 ET05-.J1|
|-|RCDM-I1 |
| 12MHz 2063 |
|-| 2018(1) ET00-.E1|
| 21.4772MHz ET11-.D10 ET01-.E3 |
| ET02-.E4 |
| 2018(2) |
| YM2203C 62256 62256 |
|YM3014B C1060C 62256 62256|
|UPC3403 |
| 384kHz |----| |----| |
|VOL M5205 | 45 | |6270| |
|MB3730 |----| |----| |
|-------------------------------------------------|
Notes:
DEC-01 - Hudson HuC6280 6502-based CPU with in-built Programmable Sound Generator
used as the main CPU. Clock input is 21.4772MHz and is divided internally
by 3 for the CPU (7.15906MHz) and by 6 for the PSG (3.579533MHz), although
in this case the PSG isn't used. The Hudson markings have been scratch off
and the IC is labelled 'DEC-01'
45 - Hudson HuC6280 6502-based CPU with in-built PSG used as the sound CPU
Clock input is 21.4772MHz and is divided internally by 3 for the CPU
and by 6 for the PSG. The Hudson markings have been scratch off and the IC
is labelled '45'
6270 - Hudson HuC6270 Video Display Controller. The Hudson markings have been
scratch off. The chip was labelled by Data East as something else but the
sticker is no longer present on top of the chip. Note the HuC6260 is NOT
present on the PCB, some logic and RAM handle the color encoding
2018(1) - Toshiba TMM2018 2kx8 SRAM used for color RAM
2018(2) - Toshiba TMM2018 2kx8 SRAM used for sound program RAM
2063 - Toshiba TMM2063 8kx8 SRAM used for main work RAM
62256 - Hitachi HM62256 32kx8 SRAM used for video RAM
ET* - EPROMs/MaskROMs
YM2203C - Yahama YM2203C FM Operator Type-N(OPN) 3-Channel Sound Chip. Clock input 1.5MHz [12/8]
YM3014B - Yamaha YM3014B Serial Input Floating D/A Converter
M5205 - Oki M5205 ADPCM Speech Synthesis LSI. Clock input is via a 384kHz resonator
MB3730 - Fujitsu MB3730 14W BTL Audio Power Amplifier. Audio output is mono via the JAMMA connector
DSW* - 8-position DIP switch
uPC3403 - NEC uPC3403 High Performance Quad Operational Amplifier
C1060C - NEC C1060C High Precision Reference Voltage Circuit
RCDM-I1 - Custom Ceramic Resistor Array
VSync - 59.12246Hz \
HSync - 15.60838kHz / measured on pins 25/26 of the HuC6270
**********************************************************************/