diff options
Diffstat (limited to 'src/mess/machine/vic20user.c')
-rw-r--r-- | src/mess/machine/vic20user.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/mess/machine/vic20user.c b/src/mess/machine/vic20user.c new file mode 100644 index 00000000000..41ee8c2ed1b --- /dev/null +++ b/src/mess/machine/vic20user.c @@ -0,0 +1,136 @@ +/********************************************************************** + + Commodore VIC-20 User Port emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "machine/vic20user.h" + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type VIC20_USER_PORT = &device_creator<vic20_user_port_device>; + + + +//************************************************************************** +// CARD INTERFACE +//************************************************************************** + +//------------------------------------------------- +// device_vic20_user_port_interface - constructor +//------------------------------------------------- + +device_vic20_user_port_interface::device_vic20_user_port_interface(const machine_config &mconfig, device_t &device) + : device_slot_card_interface(mconfig,device) +{ + m_slot = dynamic_cast<vic20_user_port_device *>(device.owner()); +} + + +//------------------------------------------------- +// ~device_vic20_user_port_interface - destructor +//------------------------------------------------- + +device_vic20_user_port_interface::~device_vic20_user_port_interface() +{ +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// vic20_user_port_device - constructor +//------------------------------------------------- + +vic20_user_port_device::vic20_user_port_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, VIC20_USER_PORT, "VIC-20 user port", tag, owner, clock), + device_slot_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// vic20_user_port_device - destructor +//------------------------------------------------- + +vic20_user_port_device::~vic20_user_port_device() +{ +} + + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void vic20_user_port_device::device_config_complete() +{ + // inherit a copy of the static data + const vic20_user_port_interface *intf = reinterpret_cast<const vic20_user_port_interface *>(static_config()); + if (intf != NULL) + { + *static_cast<vic20_user_port_interface *>(this) = *intf; + } + + // or initialize to defaults if none provided + else + { + memset(&m_out_cb1_cb, 0, sizeof(m_out_cb1_cb)); + memset(&m_out_cb2_cb, 0, sizeof(m_out_cb2_cb)); + memset(&m_out_reset_cb, 0, sizeof(m_out_reset_cb)); + } +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void vic20_user_port_device::device_start() +{ + m_cart = dynamic_cast<device_vic20_user_port_interface *>(get_card_device()); + + // resolve callbacks + m_out_cb1_func.resolve(m_out_cb1_cb, *this); + m_out_cb2_func.resolve(m_out_cb2_cb, *this); + m_out_reset_func.resolve(m_out_reset_cb, *this); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void vic20_user_port_device::device_reset() +{ + port_reset_w(ASSERT_LINE); + port_reset_w(CLEAR_LINE); +} + + +READ8_MEMBER( vic20_user_port_device::pb_r ) { UINT8 data = 0xff; if (m_cart != NULL) data = m_cart->vic20_pb_r(space, offset); return data; } +WRITE8_MEMBER( vic20_user_port_device::pb_w ) { if (m_cart != NULL) m_cart->vic20_pb_w(space, offset, data); } +READ_LINE_MEMBER( vic20_user_port_device::joy0_r ) { int state = 1; if (m_cart != NULL) state = m_cart->vic20_joy0_r(); return state; } +READ_LINE_MEMBER( vic20_user_port_device::joy1_r ) { int state = 1; if (m_cart != NULL) state = m_cart->vic20_joy1_r(); return state; } +READ_LINE_MEMBER( vic20_user_port_device::joy2_r ) { int state = 1; if (m_cart != NULL) state = m_cart->vic20_joy2_r(); return state; } +READ_LINE_MEMBER( vic20_user_port_device::light_pen_r ) { int state = 1; if (m_cart != NULL) state = m_cart->vic20_light_pen_r(); return state; } +READ_LINE_MEMBER( vic20_user_port_device::cassette_switch_r ) { int state = 1; if (m_cart != NULL) state = m_cart->vic20_cassette_switch_r(); return state; } +WRITE_LINE_MEMBER( vic20_user_port_device::cb1_w ) { if (m_cart != NULL) m_cart->vic20_cb1_w(state); } +WRITE_LINE_MEMBER( vic20_user_port_device::cb2_w ) { if (m_cart != NULL) m_cart->vic20_cb2_w(state); } +WRITE_LINE_MEMBER( vic20_user_port_device::atn_w ) { if (m_cart != NULL) m_cart->vic20_atn_w(state); } +WRITE_LINE_MEMBER( vic20_user_port_device::port_reset_w ) { if (m_cart != NULL) m_cart->vic20_reset_w(state); } + +WRITE_LINE_MEMBER( vic20_user_port_device::via_cb1_w ) { m_out_cb1_func(state); } +WRITE_LINE_MEMBER( vic20_user_port_device::via_cb2_w ) { m_out_cb2_func(state); } +WRITE_LINE_MEMBER( vic20_user_port_device::reset_w ) { m_out_reset_func(state); } |