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msx1_cart.xml: Partially implemented mapper used for msx write. (nw)

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This commit is contained in:
Wilbert Pol 2015-07-28 09:30:35 +02:00
parent 7598572ee1
commit 94754d1bcc
4 changed files with 121 additions and 3 deletions
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6
hash/msx1_cart.xml
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@ -666,15 +666,15 @@ Xyzolog - Electric Software
</part>
</software>
<!-- Does not seem to work at the moment -->
<software name="msxwritj" supported="no">
<!-- Code seems to work but it does not display text -->
<software name="msxwritj" supported="partial">
<description>Japanese MSX-Write (Jpn)</description>
<year>1986</year>
<publisher>ASCII</publisher>
<info name="alt_title" value="日本語MSX-Write" />
<part name="cart" interface="msx_cart">
<feature name="pcb" value="MSX WRITE 900178B" />
<feature name="slot" value="ascii8" />
<feature name="slot" value="msxwrite" />
<feature name="mapper" value="M60002-0125SP" />
<dataarea name="rom" size="524288">
<rom name="225 aa 8716 zoo" size="524288" crc="ef02e4f3" sha1="4180544158a57c99162269e33e4f2c77c9fce84e" offset="0" />

93
src/emu/bus/msx_cart/ascii.c
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@ -8,6 +8,7 @@ const device_type MSX_CART_ASCII8 = &device_creator<msx_cart_ascii8>;
const device_type MSX_CART_ASCII16 = &device_creator<msx_cart_ascii16>;
const device_type MSX_CART_ASCII8_SRAM = &device_creator<msx_cart_ascii8_sram>;
const device_type MSX_CART_ASCII16_SRAM = &device_creator<msx_cart_ascii16_sram>;
const device_type MSX_CART_MSXWRITE = &device_creator<msx_cart_msxwrite>;
msx_cart_ascii8::msx_cart_ascii8(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
@ -441,3 +442,95 @@ WRITE8_MEMBER(msx_cart_ascii16_sram::write_cart)
}
}
}
msx_cart_msxwrite::msx_cart_msxwrite(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, MSX_CART_MSXWRITE, "MSX Cartridge - MSXWRITE", tag, owner, clock, "msx_cart_msxwrite", __FILE__)
, msx_cart_interface(mconfig, *this)
, m_bank_mask(0)
{
for (int i = 0; i < 2; i++)
{
m_selected_bank[i] = 0;
m_bank_base[i] = NULL;
}
}
void msx_cart_msxwrite::device_start()
{
save_item(NAME(m_selected_bank));
machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_msxwrite::restore_banks), this));
}
void msx_cart_msxwrite::restore_banks()
{
for (int i = 0; i < 2; i++)
{
m_bank_base[i] = get_rom_base() + (m_selected_bank[i] & m_bank_mask) * 0x4000;
}
}
void msx_cart_msxwrite::device_reset()
{
for (int i = 0; i < 2; i++)
{
m_selected_bank[i] = 0;
}
}
void msx_cart_msxwrite::initialize_cartridge()
{
UINT32 size = get_rom_size();
if ( size > 256 * 0x4000 )
{
fatalerror("msxwrite: ROM is too big\n");
}
UINT16 banks = size / 0x4000;
if (size != banks * 0x4000 || (~(banks - 1) % banks))
{
fatalerror("msxwrite: Invalid ROM size\n");
}
m_bank_mask = banks - 1;
restore_banks();
}
READ8_MEMBER(msx_cart_msxwrite::read_cart)
{
if ( offset >= 0x4000 && offset < 0xC000 )
{
return m_bank_base[offset >> 15][offset & 0x3fff];
}
return 0xff;
}
WRITE8_MEMBER(msx_cart_msxwrite::write_cart)
{
// The rom writes to 6fff and 7fff for banking, unknown whether
// other locations also trigger banking.
switch (offset)
{
case 0x6fff:
m_selected_bank[0] = data;
m_bank_base[0] = get_rom_base() + (m_selected_bank[0] & m_bank_mask) * 0x4000;
break;
case 0x7fff:
m_selected_bank[1] = data;
m_bank_base[1] = get_rom_base() + (m_selected_bank[1] & m_bank_mask) * 0x4000;
break;
}
}

24
src/emu/bus/msx_cart/ascii.h
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@ -10,6 +10,7 @@ extern const device_type MSX_CART_ASCII8;
extern const device_type MSX_CART_ASCII16;
extern const device_type MSX_CART_ASCII8_SRAM;
extern const device_type MSX_CART_ASCII16_SRAM;
extern const device_type MSX_CART_MSXWRITE;
class msx_cart_ascii8 : public device_t
@ -114,4 +115,27 @@ private:
};
class msx_cart_msxwrite : public device_t
, public msx_cart_interface
{
public:
msx_cart_msxwrite(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void initialize_cartridge();
virtual DECLARE_READ8_MEMBER(read_cart);
virtual DECLARE_WRITE8_MEMBER(write_cart);
void restore_banks();
private:
UINT8 m_bank_mask;
UINT8 m_selected_bank[2];
UINT8 *m_bank_base[2];
};
#endif

1
src/emu/bus/msx_cart/cartridge.c
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@ -45,6 +45,7 @@ SLOT_INTERFACE_START(msx_cart)
SLOT_INTERFACE_INTERNAL("korean_80in1", MSX_CART_KOREAN_80IN1)
SLOT_INTERFACE_INTERNAL("korean_90in1", MSX_CART_KOREAN_90IN1)
SLOT_INTERFACE_INTERNAL("korean_126in1", MSX_CART_KOREAN_126IN1)
SLOT_INTERFACE_INTERNAL("msxwrite", MSX_CART_MSXWRITE)
SLOT_INTERFACE_INTERNAL("sound_snatcher", MSX_CART_SOUND_SNATCHER)
SLOT_INTERFACE_INTERNAL("sound_sdsnatch", MSX_CART_SOUND_SDSNATCHER)
SLOT_INTERFACE_INTERNAL("msxaud_hxmu900", MSX_CART_MSX_AUDIO_HXMU900)