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-rw-r--r--src/devices/bus/c64/final3.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/devices/bus/c64/final3.c b/src/devices/bus/c64/final3.c
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+++ b/src/devices/bus/c64/final3.c
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Final Cartridge III emulation
+
+**********************************************************************/
+
+#include "final3.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_FINAL3 = &device_creator<c64_final3_cartridge_device>;
+
+
+//-------------------------------------------------
+// INPUT_CHANGED_MEMBER( freeze )
+//-------------------------------------------------
+
+INPUT_CHANGED_MEMBER( c64_final3_cartridge_device::freeze )
+{
+ if (newval)
+ {
+ m_game = 0;
+ m_hidden = 0;
+ }
+
+ m_slot->nmi_w(newval);
+}
+
+
+//-------------------------------------------------
+// INPUT_PORTS( c64_final3 )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( c64_final3 )
+ PORT_START("SW")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Reset") PORT_CODE(KEYCODE_F11) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w)
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Freeze") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, c64_final3_cartridge_device, freeze, 0)
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor c64_final3_cartridge_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( c64_final3 );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_final3_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_final3_cartridge_device::c64_final3_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_FINAL3, "C64 Final Cartridge III", tag, owner, clock, "c64_final3", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_final3_cartridge_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_bank));
+ save_item(NAME(m_hidden));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_final3_cartridge_device::device_reset()
+{
+ m_bank = 0;
+
+ m_exrom = 0;
+ m_game = 0;
+
+ m_slot->nmi_w(CLEAR_LINE);
+
+ m_hidden = 0;
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_final3_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!roml || !romh || !io1 || !io2)
+ {
+ offs_t addr = (m_bank << 14) | (offset & 0x3fff);
+ data = m_roml[addr];
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// c64_cd_w - cartridge data write
+//-------------------------------------------------
+
+void c64_final3_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!m_hidden && !io2 && ((offset & 0xff) == 0xff))
+ {
+ /*
+
+ bit description
+
+ 0 A14
+ 1 A15
+ 2
+ 3
+ 4 EXROM
+ 5 GAME
+ 6 NMI
+ 7 hide register
+
+ */
+
+ m_bank = data & 0x03;
+
+ m_exrom = BIT(data, 4);
+ m_game = BIT(data, 5);
+
+ m_slot->nmi_w(BIT(data, 6) ? CLEAR_LINE : ASSERT_LINE);
+
+ m_hidden = BIT(data, 7);
+ }
+}