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Diffstat (limited to 'src/devices/bus/tvc/tvc.c')
-rw-r--r-- | src/devices/bus/tvc/tvc.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/devices/bus/tvc/tvc.c b/src/devices/bus/tvc/tvc.c new file mode 100644 index 00000000000..54ea47c9149 --- /dev/null +++ b/src/devices/bus/tvc/tvc.c @@ -0,0 +1,167 @@ +// license:BSD-3-Clause +// copyright-holders:Sandro Ronco +/********************************************************************* + + tvc.c + +*********************************************************************/ + +#include "emu.h" +#include "tvc.h" +#include "emuopts.h" + + +/*************************************************************************** + PARAMETERS +***************************************************************************/ + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type TVCEXP_SLOT = &device_creator<tvcexp_slot_device>; + + +//************************************************************************** +// TVC Expansion Interface +//************************************************************************** + +//------------------------------------------------- +// device_tvcexp_interface - constructor +//------------------------------------------------- + +device_tvcexp_interface::device_tvcexp_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device) +{ +} + + +//------------------------------------------------- +// ~device_tvcexp_interface - destructor +//------------------------------------------------- + +device_tvcexp_interface::~device_tvcexp_interface() +{ +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// tvcexp_slot_device - constructor +//------------------------------------------------- +tvcexp_slot_device::tvcexp_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, TVCEXP_SLOT, "TVC64 Expansion Slot", tag, owner, clock, "tvcexp_slot", __FILE__), + device_slot_interface(mconfig, *this), + m_out_irq_cb(*this), + m_out_nmi_cb(*this) +{ +} + +//------------------------------------------------- +// tvcexp_slot_device - destructor +//------------------------------------------------- + +tvcexp_slot_device::~tvcexp_slot_device() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void tvcexp_slot_device::device_start() +{ + m_cart = dynamic_cast<device_tvcexp_interface *>(get_card_device()); + + // resolve callbacks + m_out_irq_cb.resolve_safe(); + m_out_nmi_cb.resolve_safe(); +} + +/*------------------------------------------------- + module id read +-------------------------------------------------*/ + +UINT8 tvcexp_slot_device::id_r() +{ + UINT8 result = 0x00; + + if (m_cart) + result = m_cart->id_r() & 0x03; + + return result; +} + +/*------------------------------------------------- + module interrupt ack +-------------------------------------------------*/ + +void tvcexp_slot_device::int_ack() +{ + if (m_cart) + m_cart->int_ack(); +} + +/*------------------------------------------------- + module int read +-------------------------------------------------*/ + +UINT8 tvcexp_slot_device::int_r() +{ + UINT8 result = 1; + + if (m_cart) + result = m_cart->int_r() & 0x01; + + return result; +} + + +/*------------------------------------------------- + read +-------------------------------------------------*/ + +READ8_MEMBER(tvcexp_slot_device::read) +{ + if (m_cart) + return m_cart->read(space, offset); + else + return 0x00; +} + + +/*------------------------------------------------- + write +-------------------------------------------------*/ + +WRITE8_MEMBER(tvcexp_slot_device::write) +{ + if (m_cart) + m_cart->write(space, offset, data); +} + +/*------------------------------------------------- + IO read +-------------------------------------------------*/ + +READ8_MEMBER(tvcexp_slot_device::io_read) +{ + if (m_cart) + return m_cart->io_read(space, offset); + else + return 0x00; +} + + +/*------------------------------------------------- + IO write +-------------------------------------------------*/ + +WRITE8_MEMBER(tvcexp_slot_device::io_write) +{ + if (m_cart) + m_cart->io_write(space, offset, data); +} |