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-rw-r--r--src/mess/machine/c64/user.c108
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); }