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-rw-r--r--src/mess/machine/vic20user.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/src/mess/machine/vic20user.c b/src/mess/machine/vic20user.c
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index 00000000000..41ee8c2ed1b
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+++ b/src/mess/machine/vic20user.c
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+/**********************************************************************
+
+ 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); }