diff options
Diffstat (limited to 'src/devices/bus/c64/dela_ep7x8.cpp')
-rw-r--r-- | src/devices/bus/c64/dela_ep7x8.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/devices/bus/c64/dela_ep7x8.cpp b/src/devices/bus/c64/dela_ep7x8.cpp new file mode 100644 index 00000000000..f79b3828fe5 --- /dev/null +++ b/src/devices/bus/c64/dela_ep7x8.cpp @@ -0,0 +1,133 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Dela 7x8K EPROM cartridge emulation + +**********************************************************************/ + +#include "dela_ep7x8.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type C64_DELA_EP7X8 = &device_creator<c64_dela_ep7x8_cartridge_device>; + + +//------------------------------------------------- +// MACHINE_CONFIG_FRAGMENT( c64_dela_ep7x8 ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( c64_dela_ep7x8 ) + MCFG_GENERIC_SOCKET_ADD("rom1", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom2", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom3", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom4", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom5", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom6", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") + MCFG_GENERIC_SOCKET_ADD("rom7", generic_linear_slot, NULL) + MCFG_GENERIC_EXTENSIONS("bin,rom") +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_eprom1(*this, "rom1"), + m_eprom2(*this, "rom2"), + m_eprom3(*this, "rom3"), + m_eprom4(*this, "rom4"), + m_eprom5(*this, "rom5"), + m_eprom6(*this, "rom6"), + m_eprom7(*this, "rom7") +{ +} + + +//------------------------------------------------- +// 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_eprom1->read_rom(space, addr); + if (!BIT(m_bank, 2)) data |= m_eprom2->read_rom(space, addr); + if (!BIT(m_bank, 3)) data |= m_eprom3->read_rom(space, addr); + if (!BIT(m_bank, 4)) data |= m_eprom4->read_rom(space, addr); + if (!BIT(m_bank, 5)) data |= m_eprom5->read_rom(space, addr); + if (!BIT(m_bank, 6)) data |= m_eprom6->read_rom(space, addr); + if (!BIT(m_bank, 7)) data |= m_eprom7->read_rom(space, 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); + } +} |