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8080bw.cpp: corrected maincpu clock divider and detailed readme for shuttlei [Guru]

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This commit is contained in:
Ivan Vangelista 2018-03-20 18:07:38 +01:00
parent 3344b2f6ac
commit 532f7f9562
1 changed files with 62 additions and 17 deletions
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79
src/mame/drivers/8080bw.cpp
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@ -3,7 +3,7 @@
// thanks-to:Michael Strutts, Marco Cassili
/*****************************************************************************
8080bw.c
8080bw.cpp
Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni
Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari, and others
@ -2545,23 +2545,68 @@ MACHINE_CONFIG_END
/*****************************************************
Omori "Shuttle Invader" ??
Guru Readme for Shuttle Invader (Omori 1979)
8080 CPU
PCB Layout
----------
1x SN76477
g 2x SN75452
4x 8216 RAM
2x TMS4045 RAM
16x MCM4027 RAM
1x empty small socket. maybe (missing) PROM?
1x 8 position dipsw
1x 556
1x 458
1x lm380 (amp chip)
OEC-3C
|----------------------------------------------------------|
| LM556 DIP16 |
|VR1 |
| LM458 SN76477 |
|VR2 5.545MHz |
| LM380 |
| 4045 4045 |
| 2.11C 1.13C |
| 18MHz 4027 4027 4027 4027 |
| 4.11D 3.13D |
| AM8224 4027 4027 4027 4027 |
| i8080 DIP24 5.13E |
| DSW 4027 4027 4027 4027 |
| |
|SN75452 SN75452 8.11F 4027 4027 4027 4027 |
| CN2 8216 8216 CN1 |
|----------------------------------------------------------|
Notes:
i8080 - Intel 8080 CPU. Clock input 2.000MHz [18/9]. Note the /9 comes from the AM8224
SN76477 - Texas Instruments SN76477 Complex Sound Generator
SN75452 - Texas Instruments SN75452 Dual High Speed High Current Peripheral Driver
8216 - NEC uPB8216 4 Bit Parallel Bi-Directional Bus Driver
4045 - Texas Instruments TMS4045 1k x 4-bit Static RAM (Work RAM)
4027 - Motorola MCM4027 4k x 1-bit Dynamic RAM (Video RAM)
AM8224 - AMD AM8224 Clock Generator and Driver for 8080-Compatible Microprocessors
DIP16 - DIP16 socket for connection of 16-wire flat cable joining to OEC-4A PCB
LM556 - Texas Instruments LM556 Dual Timer
LM458 - Texas Instruments LM458 Low Power Dual Operational Amplifier
LM380 - Texas Instruments LM380 2.5W Audio Power Amplifier
CN1 - 11-pin Power Input Connector. Pinout (left to right) is GND,GND,GND,+5V,+5V,+5V,+12V,+12V,+12V,[SPACE],-5V
CN2 - 25-pin Connector for Control Inputs/Audio Output etc.
VR1 - Potentiometer (Master Volume)
VR2 - Potentiometer (volume of other sounds? maybe background sounds?)
DSW - 8-position DIP Switch
xtal 18MHz
xtal 5.545MHz
Additional PCB (more sounds?)
--------------
OEC-4A
|-------------------|
| VR1 74121 |
| 7400 7404 74S287 |
|75452 CN2 CN1 LM723|
|75452 |
| |
|--| 22-WAY |--|
|-------------|
Notes: (All IC's shown)
LM723 - Texas Instruments LM723 Voltage Regulator
74S287 - Texas Instruments SN74S287 256-bit x 4-bit Bi-Polar PROM at location 2B
75452 - Texas Instruments SN75452 Dual High Speed High Current Peripheral Driver
VR1 - Potentiometer connected to LM723 pin 5
CN1 - DIP16 socket for connection of 16-wire flat cable joining to Main PCB
CN2 - Empty DIP16 socket
22-WAY - Single-Sided 22-WAY Card Edge Connector. Has many tracks coming from it, as well as power.
It's purpose and what it plugs into is unknown.
******************************************************/
@ -2698,8 +2743,8 @@ void _8080bw_state::shuttlei_io_map(address_map &map)
MACHINE_CONFIG_START(_8080bw_state::shuttlei)
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8080, XTAL(18'000'000) / 10) // divider guessed
// TODO: move irq handling away from mw8080.c, this game runs on custom hardware
MCFG_CPU_ADD("maincpu", I8080, XTAL(18'000'000) / 9)
// TODO: move irq handling away from mw8080.cpp, this game runs on custom hardware
MCFG_CPU_PROGRAM_MAP(shuttlei_map)
MCFG_CPU_IO_MAP(shuttlei_io_map)