summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/c64_warp_speed.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mess/machine/c64_warp_speed.c')
-rw-r--r--src/mess/machine/c64_warp_speed.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/src/mess/machine/c64_warp_speed.c b/src/mess/machine/c64_warp_speed.c
new file mode 100644
index 00000000000..cf04586b413
--- /dev/null
+++ b/src/mess/machine/c64_warp_speed.c
@@ -0,0 +1,160 @@
+/**********************************************************************
+
+ Cinemaware Warp Speed cartridge emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+/*
+
+ PCB Layout
+ ----------
+
+ |===================|
+ |=| SW1 |
+ |=| |
+ |=| SW2 |
+ |=| |
+ |=| |
+ |=| ROM |
+ |=| LS109|
+ |=| |
+ |===================|
+
+ ROM - "DEI-356NR-WRPIIDA1 (C) NCR A8847 609-2415038 F833071" 16Kx8 ROM
+ SW1 - mode switch (C64/C128)
+ SW2 - reset button
+
+*/
+
+#include "c64_warp_speed.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define UNSCRAMBLE_ADDRESS(_offset) \
+ BITSWAP16(_offset,15,14,12,13,5,2,7,9,11,10,8,6,4,3,1,0)
+
+#define UNSCRAMBLE_DATA(_data) \
+ BITSWAP8(_data,7,6,5,0,1,4,2,3)
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_WARP_SPEED = &device_creator<c64_warp_speed_cartridge_device>;
+
+
+//-------------------------------------------------
+// INPUT_PORTS( c64_warp_speed )
+//-------------------------------------------------
+
+INPUT_CHANGED_MEMBER( c64_warp_speed_cartridge_device::reset )
+{
+ if (!newval)
+ {
+ device_reset();
+ }
+
+ m_slot->reset_w(newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+static INPUT_PORTS_START( c64_warp_speed )
+ PORT_START("SW1")
+ PORT_DIPNAME( 0x01, 0x01, "Mode" )
+ PORT_DIPSETTING( 0x01, "C64" )
+ PORT_DIPSETTING( 0x00, "C128" )
+
+ PORT_START("SW2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Reset") PORT_CODE(KEYCODE_F11) PORT_CHANGED_MEMBER(DEVICE_SELF, c64_warp_speed_cartridge_device, reset, 0)
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor c64_warp_speed_cartridge_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( c64_warp_speed );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_warp_speed_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_warp_speed_cartridge_device::c64_warp_speed_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_WARP_SPEED, "C64 Warp Speed cartridge", tag, owner, clock),
+ device_c64_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_warp_speed_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_warp_speed_cartridge_device::device_reset()
+{
+ m_exrom = 0;
+ m_game = 0;
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_warp_speed_cartridge_device::c64_cd_r(address_space &space, offs_t offset, int ba, int roml, int romh, int io1, int io2)
+{
+ UINT8 data = 0;
+
+ if (!roml || !romh || !io1 || !io2)
+ {
+ offs_t addr = UNSCRAMBLE_ADDRESS(offset & 0x3fff);
+ data = UNSCRAMBLE_DATA(m_roml[addr]);
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// c64_cd_w - cartridge data write
+//-------------------------------------------------
+
+void c64_warp_speed_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!io1)
+ {
+ m_exrom = 0;
+ m_game = 0;
+ }
+ else if (!io2)
+ {
+ m_exrom = 1;
+ m_game = 1;
+ }
+}