diff options
Diffstat (limited to 'src/devices/bus/plus4/exp.c')
-rw-r--r-- | src/devices/bus/plus4/exp.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/devices/bus/plus4/exp.c b/src/devices/bus/plus4/exp.c new file mode 100644 index 00000000000..801470cbf30 --- /dev/null +++ b/src/devices/bus/plus4/exp.c @@ -0,0 +1,209 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore Plus/4 Expansion Port emulation + +**********************************************************************/ + +#include "exp.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define LOG 0 + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type PLUS4_EXPANSION_SLOT = &device_creator<plus4_expansion_slot_device>; + + + +//************************************************************************** +// DEVICE PLUS4_EXPANSION CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_plus4_expansion_card_interface - constructor +//------------------------------------------------- + +device_plus4_expansion_card_interface::device_plus4_expansion_card_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device), + m_c1l(*this, "c1l"), + m_c1h(*this, "c1h"), + m_c2l(*this, "c2l"), + m_c2h(*this, "c2h"), + m_c1l_mask(0), + m_c1h_mask(0), + m_c2l_mask(0), + m_c2h_mask(0) +{ + m_slot = dynamic_cast<plus4_expansion_slot_device *>(device.owner()); +} + + +//------------------------------------------------- +// ~device_plus4_expansion_card_interface - destructor +//------------------------------------------------- + +device_plus4_expansion_card_interface::~device_plus4_expansion_card_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// plus4_expansion_slot_device - constructor +//------------------------------------------------- + +plus4_expansion_slot_device::plus4_expansion_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, PLUS4_EXPANSION_SLOT, "Expansion Port", tag, owner, clock, "plus4_expansion_slot", __FILE__), + device_slot_interface(mconfig, *this), + device_image_interface(mconfig, *this), + m_write_irq(*this), + m_read_dma_cd(*this), + m_write_dma_cd(*this), + m_write_aec(*this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void plus4_expansion_slot_device::device_start() +{ + m_card = dynamic_cast<device_plus4_expansion_card_interface *>(get_card_device()); + + // resolve callbacks + m_write_irq.resolve_safe(); + m_read_dma_cd.resolve_safe(0xff); + m_write_dma_cd.resolve_safe(); + m_write_aec.resolve_safe(); + + // inherit bus clock + if (clock() == 0) + { + plus4_expansion_slot_device *root = machine().device<plus4_expansion_slot_device>(PLUS4_EXPANSION_SLOT_TAG); + assert(root); + set_unscaled_clock(root->clock()); + } +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void plus4_expansion_slot_device::device_reset() +{ + if (get_card_device()) + { + get_card_device()->reset(); + } +} + + +//------------------------------------------------- +// call_load - +//------------------------------------------------- + +bool plus4_expansion_slot_device::call_load() +{ + if (m_card) + { + if (software_entry() == NULL) + { + // TODO + } + else + { + load_software_region("c1l", m_card->m_c1l); + load_software_region("c1h", m_card->m_c1h); + load_software_region("c2l", m_card->m_c2l); + load_software_region("c2h", m_card->m_c2h); + } + } + + return IMAGE_INIT_PASS; +} + + +//------------------------------------------------- +// call_softlist_load - +//------------------------------------------------- + +bool plus4_expansion_slot_device::call_softlist_load(software_list_device &swlist, const char *swname, const rom_entry *start_entry) +{ + load_software_part_region(*this, swlist, swname, start_entry); + + return true; +} + + +//------------------------------------------------- +// get_default_card_software - +//------------------------------------------------- + +void plus4_expansion_slot_device::get_default_card_software(std::string &result) +{ + software_get_default_slot(result, "standard"); +} + + +//------------------------------------------------- +// cd_r - cartridge data read +//------------------------------------------------- + +UINT8 plus4_expansion_slot_device::cd_r(address_space &space, offs_t offset, UINT8 data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) +{ + if (m_card != NULL) + { + data = m_card->plus4_cd_r(space, offset, data, ba, cs0, c1l, c1h, cs1, c2l, c2h); + } + + return data; +} + + +//------------------------------------------------- +// cd_w - cartridge data write +//------------------------------------------------- + +void plus4_expansion_slot_device::cd_w(address_space &space, offs_t offset, UINT8 data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) +{ + if (m_card != NULL) + { + m_card->plus4_cd_w(space, offset, data, ba, cs0, c1l, c1h, cs1, c2l, c2h); + } +} + + +//------------------------------------------------- +// SLOT_INTERFACE( plus4_expansion_cards ) +//------------------------------------------------- + +// slot devices +#include "c1551.h" +#include "sid.h" +#include "std.h" + +SLOT_INTERFACE_START( plus4_expansion_cards ) + SLOT_INTERFACE("c1551", C1551) + SLOT_INTERFACE("sid", PLUS4_SID) + + // the following need ROMs from the software list + SLOT_INTERFACE_INTERNAL("standard", PLUS4_STD) +SLOT_INTERFACE_END |