/********************************************************************* a2swyft.c Implementation of the IAI SwyftCard *********************************************************************/ #include "emu.h" #include "includes/apple2.h" #include "machine/a2swyft.h" /*************************************************************************** PARAMETERS ***************************************************************************/ //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type A2BUS_SWYFT = &device_creator; #define SWYFT_ROM_REGION "swyft_rom" ROM_START( swyft ) ROM_REGION(0x4000, SWYFT_ROM_REGION, 0) ROM_LOAD( "840-003a.bin", 0x000000, 0x004000, CRC(5d6673e9) SHA1(1554bd03c536789f0ff7d1ef6c992265e311935d) ) ROM_REGION(0x1000, "pal16r4", 0) ROM_LOAD( "swyft_pal16r4.jed", 0x0000, 0x08EF, CRC(462a6938) SHA1(38be885539cf91423a246378c411ac8b2f150ec6) ) // swyft3.pal derived by D. Elvey, works as a replacement pal (original is protected?) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *a2bus_swyft_device::device_rom_region() const { return ROM_NAME( swyft ); } //************************************************************************** // LIVE DEVICE //************************************************************************** a2bus_swyft_device::a2bus_swyft_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, A2BUS_SWYFT, "IAI SwyftCard", tag, owner, clock), device_a2bus_card_interface(mconfig, *this) { m_shortname = "a2swyft"; } a2bus_swyft_device::a2bus_swyft_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, type, name, tag, owner, clock), device_a2bus_card_interface(mconfig, *this) { m_shortname = "a2swyft"; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void a2bus_swyft_device::device_start() { // set_a2bus_device makes m_slot valid set_a2bus_device(); astring tempstring; m_rom = device().machine().root_device().memregion(this->subtag(tempstring, SWYFT_ROM_REGION))->base(); save_item(NAME(m_rombank)); } void a2bus_swyft_device::device_reset() { m_rombank = 0; // take over the machine apple2_state *state = machine().driver_data(); raise_slot_inh(); state->m_maincpu->reset(); } UINT8 a2bus_swyft_device::read_c0nx(address_space &space, UINT8 offset) { switch (offset) { case 0: m_rombank = 0; raise_slot_inh(); break; case 1: m_rombank = 0; lower_slot_inh(); break; case 2: m_rombank = 0x1000; raise_slot_inh(); break; } return 0xff; } void a2bus_swyft_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) { switch (offset) { case 0: m_rombank = 0; raise_slot_inh(); break; case 1: m_rombank = 0; lower_slot_inh(); break; case 2: m_rombank = 0x1000; raise_slot_inh(); break; } } UINT8 a2bus_swyft_device::read_inh_rom(address_space &space, UINT16 offset) { if (offset < 0x1000) // banked area d000-dfff { return m_rom[offset + m_rombank]; } else // fixed area e000-ffff { return m_rom[offset - 0x1000 + 0x2000]; } }