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(MESS) gamegear: added preliminary emulation of the Master Gear Adapter

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which allows to launch SMS games in the gamegear driver, with video chip
in SMS mode. You can try this by launching
  mess.exe gamegear -cart mgear -cart2 your_sms_game
(the -cart2 switch becomes available when you mount "mgear" in the main
gamegear cart slot) [Fabio Priuli]

out of the whatsnew: for the moment only fullpath loading is supported, and it is not
ensured to work 100%. thanks to Enik Land for pointing me to the necessary info.
This commit is contained in:
Fabio Priuli 2014-10-12 11:30:13 +00:00
parent 2c4831d5da
commit ab592dea63
12 changed files with 196 additions and 67 deletions
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4
.gitattributes vendored
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@ -1534,6 +1534,10 @@ src/emu/bus/scv/rom.c svneol=native#text/plain
src/emu/bus/scv/rom.h svneol=native#text/plain
src/emu/bus/scv/slot.c svneol=native#text/plain
src/emu/bus/scv/slot.h svneol=native#text/plain
src/emu/bus/sega8/ccatch.c svneol=native#text/plain
src/emu/bus/sega8/ccatch.h svneol=native#text/plain
src/emu/bus/sega8/mgear.c svneol=native#text/plain
src/emu/bus/sega8/mgear.h svneol=native#text/plain
src/emu/bus/sega8/rom.c svneol=native#text/plain
src/emu/bus/sega8/rom.h svneol=native#text/plain
src/emu/bus/sega8/sega8_slot.c svneol=native#text/plain

13
hash/gamegear.xml
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@ -9960,4 +9960,17 @@ a certain item) -->
</part>
</software>
<software name="mgear">
<description>Master Gear Adapter</description>
<year>198?</year>
<publisher>&lt;unknown&gt;</publisher>
<part name="cart" interface="gamegear_cart">
<feature name="slot" value="mgear" />
<feature name="pin_42" value="sms_mode" />
<dataarea name="rom" size="1">
<!-- this cartridge is just an adapted -->
</dataarea>
</part>
</software>
</softwarelist>

2
src/emu/bus/bus.mak
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@ -1143,6 +1143,8 @@ ifneq ($(filter SEGA8,$(BUSES)),)
OBJDIRS += $(BUSOBJ)/sega8
BUSOBJS += $(BUSOBJ)/sega8/sega8_slot.o
BUSOBJS += $(BUSOBJ)/sega8/rom.o
BUSOBJS += $(BUSOBJ)/sega8/ccatch.o
BUSOBJS += $(BUSOBJ)/sega8/mgear.o
endif
#-------------------------------------------------

61
src/emu/bus/sega8/ccatch.c Normal file
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@ -0,0 +1,61 @@
/***********************************************************************************************************
SG-1000 Card Catcher emulation
Sega Card Catcher is a passthrough adapter for
SG-1000 to load games in MyCard format into the
main cartslot
***********************************************************************************************************/
#include "emu.h"
#include "ccatch.h"
//-------------------------------------------------
// constructors
//-------------------------------------------------
const device_type SEGA8_ROM_CARDCATCH = &device_creator<sega8_cardcatch_device>;
sega8_cardcatch_device::sega8_cardcatch_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: sega8_rom_device(mconfig, SEGA8_ROM_CARDCATCH, "SG-1000 Card Catcher Cart", tag, owner, clock, "sega8_ccatch", __FILE__),
m_card(*this, "cardslot")
{
}
/*-------------------------------------------------
mapper specific handlers
-------------------------------------------------*/
READ8_MEMBER(sega8_cardcatch_device::read_cart)
{
if (offset < 0x8000)
return m_card->read_cart(space, offset);
return 0xff;
}
WRITE8_MEMBER(sega8_cardcatch_device::write_cart)
{
// this should never happen, because there is no RAM on cards
if (offset < 0x8000)
logerror("Attempt to write to MyCard\n");
}
static SLOT_INTERFACE_START(sg1000_card)
SLOT_INTERFACE_INTERNAL("rom", SEGA8_ROM_STD)
SLOT_INTERFACE_END
static MACHINE_CONFIG_FRAGMENT( sub_slot )
MCFG_SG1000_CARD_ADD("cardslot", sg1000_card, NULL)
MACHINE_CONFIG_END
machine_config_constructor sega8_cardcatch_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sub_slot );
}

33
src/emu/bus/sega8/ccatch.h Normal file
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@ -0,0 +1,33 @@
#ifndef __SEGA8_CCATCH_H
#define __SEGA8_CCATCH_H
#include "sega8_slot.h"
#include "rom.h"
// ======================> sega8_cardcatch_device
class sega8_cardcatch_device : public sega8_rom_device
{
public:
// construction/destruction
sega8_cardcatch_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// reading and writing
virtual DECLARE_READ8_MEMBER(read_cart);
virtual DECLARE_WRITE8_MEMBER(write_cart);
virtual DECLARE_WRITE8_MEMBER(write_mapper) {}
virtual machine_config_constructor device_mconfig_additions() const;
protected:
required_device<sega8_card_slot_device> m_card;
};
// device type definition
extern const device_type SEGA8_ROM_CARDCATCH;
#endif

44
src/emu/bus/sega8/mgear.c Normal file
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@ -0,0 +1,44 @@
/***********************************************************************************************************
Master Gear Adapter emulation
***********************************************************************************************************/
#include "emu.h"
#include "mgear.h"
//-------------------------------------------------
// constructors
//-------------------------------------------------
const device_type SEGA8_ROM_MGEAR = &device_creator<sega8_mgear_device>;
sega8_mgear_device::sega8_mgear_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: sega8_rom_device(mconfig, SEGA8_ROM_MGEAR, "Master Gear Adapter", tag, owner, clock, "sega8_mgear", __FILE__),
m_subslot(*this, "subslot")
{
}
void sega8_mgear_device::device_start()
{
}
void sega8_mgear_device::device_reset()
{
}
/*-------------------------------------------------
mapper specific handlers
-------------------------------------------------*/
static MACHINE_CONFIG_FRAGMENT( sub_slot )
MCFG_SMS_CARTRIDGE_ADD("subslot", sms_cart, NULL)
MACHINE_CONFIG_END
machine_config_constructor sega8_mgear_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sub_slot );
}

36
src/emu/bus/sega8/mgear.h Normal file
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@ -0,0 +1,36 @@
#ifndef __SEGA8_MGEAR_H
#define __SEGA8_MGEAR_H
#include "sega8_slot.h"
#include "rom.h"
// ======================> sega8_mgear_device
class sega8_mgear_device : public sega8_rom_device
{
public:
// construction/destruction
sega8_mgear_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start();
virtual void device_reset();
// reading and writing
virtual DECLARE_READ8_MEMBER(read_cart) { return m_subslot->read_cart(space, offset); }
virtual DECLARE_WRITE8_MEMBER(write_cart) { m_subslot->write_cart(space, offset, data); }
virtual DECLARE_WRITE8_MEMBER(write_mapper) { m_subslot->write_mapper(space, offset, data); }
virtual machine_config_constructor device_mconfig_additions() const;
protected:
required_device<sega8_cart_slot_device> m_subslot;
};
// device type definition
extern const device_type SEGA8_ROM_MGEAR;
#endif

44
src/emu/bus/sega8/rom.c
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@ -20,7 +20,6 @@
const device_type SEGA8_ROM_STD = &device_creator<sega8_rom_device>;
// Specific SG-1000 MkI - MkII cart types
const device_type SEGA8_ROM_CARDCATCH = &device_creator<sega8_cardcatch_device>;
const device_type SEGA8_ROM_OTHELLO = &device_creator<sega8_othello_device>;
const device_type SEGA8_ROM_CASTLE = &device_creator<sega8_castle_device>;
const device_type SEGA8_ROM_BASIC_L3 = &device_creator<sega8_basic_l3_device>;
@ -56,13 +55,6 @@ sega8_rom_device::sega8_rom_device(const machine_config &mconfig, const char *ta
sega8_cardcatch_device::sega8_cardcatch_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: sega8_rom_device(mconfig, SEGA8_ROM_CARDCATCH, "SG-1000 Card Catcher Cart", tag, owner, clock, "sega8_ccatch", __FILE__),
m_card(*this, "cardslot")
{
}
sega8_othello_device::sega8_othello_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: sega8_rom_device(mconfig, SEGA8_ROM_OTHELLO, "SG-1000 Othello Cart", tag, owner, clock, "sega8_othello", __FILE__)
{
@ -372,42 +364,6 @@ WRITE8_MEMBER(sega8_rom_device::write_mapper)
}
/*-------------------------------------------------
Sega Card Catcher is a passthrough adapter for
SG-1000 to load games in MyCard format into the
main cartslot
-------------------------------------------------*/
READ8_MEMBER(sega8_cardcatch_device::read_cart)
{
if (offset < 0x8000)
return m_card->read_cart(space, offset);
return 0xff;
}
WRITE8_MEMBER(sega8_cardcatch_device::write_cart)
{
// this should never happen, because there is no RAM on cards
if (offset < 0x8000)
logerror("Attempt to write to MyCard\n");
}
static SLOT_INTERFACE_START(sg1000_card)
SLOT_INTERFACE_INTERNAL("rom", SEGA8_ROM_STD)
SLOT_INTERFACE_END
static MACHINE_CONFIG_FRAGMENT( sub_slot )
MCFG_SG1000_CARD_ADD("cardslot", sg1000_card, NULL)
MACHINE_CONFIG_END
machine_config_constructor sega8_cardcatch_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sub_slot );
}
/*-------------------------------------------------
Othello is a SG-1000 game featuring 2K of

21
src/emu/bus/sega8/rom.h
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@ -34,26 +34,6 @@ protected:
// ======================> sega8_cardcatch_device
class sega8_cardcatch_device : public sega8_rom_device
{
public:
// construction/destruction
sega8_cardcatch_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// reading and writing
virtual DECLARE_READ8_MEMBER(read_cart);
virtual DECLARE_WRITE8_MEMBER(write_cart);
virtual DECLARE_WRITE8_MEMBER(write_mapper) {}
virtual machine_config_constructor device_mconfig_additions() const;
protected:
required_device<sega8_card_slot_device> m_card;
};
// ======================> sega8_othello_device
class sega8_othello_device : public sega8_rom_device
@ -363,7 +343,6 @@ public:
// device type definition
extern const device_type SEGA8_ROM_STD;
extern const device_type SEGA8_ROM_CARDCATCH;
extern const device_type SEGA8_ROM_OTHELLO;
extern const device_type SEGA8_ROM_CASTLE;
extern const device_type SEGA8_ROM_BASIC_L3;

3
src/emu/bus/sega8/sega8_slot.c
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@ -822,6 +822,8 @@ void sega8_cart_slot_device::internal_header_logging(UINT8 *ROM, UINT32 len, UIN
// slot interfaces
#include "rom.h"
#include "ccatch.h"
#include "mgear.h"
SLOT_INTERFACE_START(sg1000_cart)
SLOT_INTERFACE_INTERNAL("rom", SEGA8_ROM_STD)
@ -869,5 +871,6 @@ SLOT_INTERFACE_START(gg_cart)
SLOT_INTERFACE_INTERNAL("rom", SEGA8_ROM_STD)
SLOT_INTERFACE_INTERNAL("eeprom", SEGA8_ROM_EEPROM)
SLOT_INTERFACE_INTERNAL("codemasters", SEGA8_ROM_CODEMASTERS)
SLOT_INTERFACE_INTERNAL("mgear", SEGA8_ROM_MGEAR)
SLOT_INTERFACE_END

1
src/mess/drivers/sg1000.c
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@ -67,7 +67,6 @@ Notes:
#include "includes/sg1000.h"
#include "bus/rs232/rs232.h"
#include "bus/sega8/rom.h"
/***************************************************************************

1
src/mess/drivers/sms.c
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@ -231,7 +231,6 @@ DC00 - Selection buttons #2, 9-16 (R)
#include "sound/2413intf.h"
#include "video/315_5124.h"
#include "includes/sms.h"
#include "bus/sega8/rom.h"
#include "sms1.lh"