diff options
Diffstat (limited to 'src/mess/machine/c64/user.c')
-rw-r--r-- | src/mess/machine/c64/user.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/mess/machine/c64/user.c b/src/mess/machine/c64/user.c new file mode 100644 index 00000000000..ca09ef1af29 --- /dev/null +++ b/src/mess/machine/c64/user.c @@ -0,0 +1,108 @@ +/********************************************************************** + + Commodore 64 User Port emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "machine/c64/user.h" + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type C64_USER_PORT = &device_creator<c64_user_port_device>; + + + +//************************************************************************** +// CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_c64_user_port_interface - constructor +//------------------------------------------------- + +device_c64_user_port_interface::device_c64_user_port_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig,device) +{ + m_slot = dynamic_cast<c64_user_port_device *>(device.owner()); +} + + +//------------------------------------------------- +// ~device_c64_user_port_interface - destructor +//------------------------------------------------- + +device_c64_user_port_interface::~device_c64_user_port_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// c64_user_port_device - constructor +//------------------------------------------------- + +c64_user_port_device::c64_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, C64_USER_PORT, "C64 user port", tag, owner, clock, "c64_user_port", __FILE__), + device_slot_interface(mconfig, *this), + m_write_cnt1(*this), + m_write_sp1(*this), + m_write_cnt2(*this), + m_write_sp2(*this), + m_write_flag2(*this), + m_write_reset(*this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void c64_user_port_device::device_start() +{ + m_card = dynamic_cast<device_c64_user_port_interface *>(get_card_device()); + + // resolve callbacks + m_write_cnt1.resolve_safe(); + m_write_sp1.resolve_safe(); + m_write_cnt2.resolve_safe(); + m_write_sp2.resolve_safe(); + m_write_flag2.resolve_safe(); + m_write_reset.resolve_safe(); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void c64_user_port_device::device_reset() +{ + if (get_card_device()) + { + get_card_device()->reset(); + } +} + + +READ8_MEMBER( c64_user_port_device::pb_r ) { UINT8 data = 0xff; if (m_card != NULL) data = m_card->c64_pb_r(space, offset); return data; } +WRITE8_MEMBER( c64_user_port_device::pb_w ) { if (m_card != NULL) m_card->c64_pb_w(space, offset, data); } +READ_LINE_MEMBER( c64_user_port_device::pa2_r ) { int state = 1; if (m_card != NULL) state = m_card->c64_pa2_r(); return state; } +WRITE_LINE_MEMBER( c64_user_port_device::pa2_w ) { if (m_card != NULL) m_card->c64_pa2_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::pc2_w ) { if (m_card != NULL) m_card->c64_pc2_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::atn_w ) { if (m_card != NULL) m_card->c64_atn_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::cnt1_w ) { if (m_card != NULL) m_card->c64_cnt1_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::sp1_w ) { if (m_card != NULL) m_card->c64_sp1_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::cnt2_w ) { if (m_card != NULL) m_card->c64_cnt2_w(state); } +WRITE_LINE_MEMBER( c64_user_port_device::sp2_w ) { if (m_card != NULL) m_card->c64_sp2_w(state); } |