diff options
Diffstat (limited to 'src/mess/machine/c64/dela_ep7x8.c')
-rw-r--r-- | src/mess/machine/c64/dela_ep7x8.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/mess/machine/c64/dela_ep7x8.c b/src/mess/machine/c64/dela_ep7x8.c new file mode 100644 index 00000000000..08eb446d318 --- /dev/null +++ b/src/mess/machine/c64/dela_ep7x8.c @@ -0,0 +1,154 @@ +/********************************************************************** + + Dela 7x8K EPROM cartridge emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "dela_ep7x8.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type C64_DELA_EP7X8 = &device_creator<c64_dela_ep7x8_cartridge_device>; + + +//------------------------------------------------- +// ROM( c64_dela_ep7x8 ) +//------------------------------------------------- + +ROM_START( c64_dela_ep7x8 ) + ROM_REGION( 0x10000, "eprom", 0 ) + ROM_CART_LOAD( "rom1", 0x2000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom2", 0x4000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom3", 0x6000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom4", 0x8000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom5", 0xa000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom6", 0xc000, 0x2000, ROM_MIRROR ) + ROM_CART_LOAD( "rom7", 0xe000, 0x2000, ROM_MIRROR ) +ROM_END + + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *c64_dela_ep7x8_cartridge_device::device_rom_region() const +{ + return ROM_NAME( c64_dela_ep7x8 ); +} + + +//------------------------------------------------- +// MACHINE_CONFIG_FRAGMENT( c64_dela_ep7x8 ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( c64_dela_ep7x8 ) + MCFG_CARTSLOT_ADD("rom1") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom2") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom3") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom4") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom5") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom6") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") + MCFG_CARTSLOT_ADD("rom7") + MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor c64_dela_ep7x8_cartridge_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( c64_dela_ep7x8 ); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// c64_dela_ep7x8_cartridge_device - constructor +//------------------------------------------------- + +c64_dela_ep7x8_cartridge_device::c64_dela_ep7x8_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, C64_DELA_EP7X8, "C64 Dela 7x8KB EPROM cartridge", tag, owner, clock, "ep7x8", __FILE__), + device_c64_expansion_card_interface(mconfig, *this), + m_eprom(*this, "eprom") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void c64_dela_ep7x8_cartridge_device::device_start() +{ + // state saving + save_item(NAME(m_bank)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void c64_dela_ep7x8_cartridge_device::device_reset() +{ + m_bank = 0xfe; + m_exrom = 0; +} + + +//------------------------------------------------- +// c64_cd_r - cartridge data read +//------------------------------------------------- + +UINT8 c64_dela_ep7x8_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) +{ + if (!roml) + { + offs_t addr = offset & 0x1fff; + + if (!BIT(m_bank, 0)) data |= m_roml[addr]; + if (!BIT(m_bank, 1)) data |= m_eprom->base()[0x2000 + addr]; + if (!BIT(m_bank, 2)) data |= m_eprom->base()[0x4000 + addr]; + if (!BIT(m_bank, 3)) data |= m_eprom->base()[0x6000 + addr]; + if (!BIT(m_bank, 4)) data |= m_eprom->base()[0x8000 + addr]; + if (!BIT(m_bank, 5)) data |= m_eprom->base()[0xa000 + addr]; + if (!BIT(m_bank, 6)) data |= m_eprom->base()[0xc000 + addr]; + if (!BIT(m_bank, 7)) data |= m_eprom->base()[0xe000 + addr]; + } + + return data; +} + + +//------------------------------------------------- +// c64_cd_w - cartridge data write +//------------------------------------------------- + +void c64_dela_ep7x8_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) +{ + if (!io1) + { + m_bank = data; + + m_exrom = (data == 0xff); + } +} |