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Diffstat (limited to 'src/devices/bus/astrocde/exp.c')
-rw-r--r-- | src/devices/bus/astrocde/exp.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/astrocde/exp.c b/src/devices/bus/astrocde/exp.c new file mode 100644 index 00000000000..28017230f0d --- /dev/null +++ b/src/devices/bus/astrocde/exp.c @@ -0,0 +1,85 @@ +// license:BSD-3-Clause +// copyright-holders:Fabio Priuli +/*********************************************************************************************************** + + Bally Astrocade Expansion port + + ***********************************************************************************************************/ + + +#include "emu.h" +#include "exp.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type ASTROCADE_EXP_SLOT = &device_creator<astrocade_exp_device>; + + +device_astrocade_card_interface::device_astrocade_card_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig, device) +{ +} + + +device_astrocade_card_interface::~device_astrocade_card_interface() +{ +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// astrocade_exp_device - constructor +//------------------------------------------------- +astrocade_exp_device::astrocade_exp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, ASTROCADE_EXP_SLOT, "Bally Astrocade expansion", tag, owner, clock, "astrocde_exp", __FILE__), + device_slot_interface(mconfig, *this), + m_card_mounted(false) +{ +} + + +//------------------------------------------------- +// astrocade_exp_device - destructor +//------------------------------------------------- + +astrocade_exp_device::~astrocade_exp_device() +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void astrocade_exp_device::device_start() +{ + m_card = dynamic_cast<device_astrocade_card_interface *>(get_card_device()); + if (m_card) + m_card_mounted = true; +} + +/*------------------------------------------------- + read + -------------------------------------------------*/ + +READ8_MEMBER(astrocade_exp_device::read) +{ + if (m_card) + return m_card->read(space, offset); + else + return 0xff; +} + +/*------------------------------------------------- + write + -------------------------------------------------*/ + +WRITE8_MEMBER(astrocade_exp_device::write) +{ + if (m_card) + m_card->write(space, offset, data); +} |