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-rw-r--r--src/devices/bus/apricot/ram.c177
1 files changed, 177 insertions, 0 deletions
diff --git a/src/devices/bus/apricot/ram.c b/src/devices/bus/apricot/ram.c
new file mode 100644
index 00000000000..2221ae37227
--- /dev/null
+++ b/src/devices/bus/apricot/ram.c
@@ -0,0 +1,177 @@
+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ ACT Apricot RAM Expansions
+
+***************************************************************************/
+
+#include "ram.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type APRICOT_256K_RAM = &device_creator<apricot_256k_ram_device>;
+const device_type APRICOT_128K_RAM = &device_creator<apricot_128k_ram_device>;
+const device_type APRICOT_512K_RAM = &device_creator<apricot_512k_ram_device>;
+
+
+//**************************************************************************
+// APRICOT 256K RAM DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+static INPUT_PORTS_START( apricot_256k )
+ PORT_START("sw")
+ PORT_DIPNAME(0x01, 0x00, "Base Address")
+ PORT_DIPSETTING(0x00, "40000H")
+ PORT_DIPSETTING(0x01, "80000H")
+INPUT_PORTS_END
+
+ioport_constructor apricot_256k_ram_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( apricot_256k );
+}
+
+//-------------------------------------------------
+// apricot_256k_ram_device - constructor
+//-------------------------------------------------
+
+apricot_256k_ram_device::apricot_256k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, APRICOT_256K_RAM, "Apricot 256K RAM Expansion Board", tag, owner, clock, "apricot_256k_ram", __FILE__),
+ device_apricot_expansion_card_interface(mconfig, *this),
+ m_sw(*this, "sw")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void apricot_256k_ram_device::device_start()
+{
+ m_ram.resize(0x40000 / 2);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void apricot_256k_ram_device::device_reset()
+{
+ if (m_sw->read() == 0)
+ m_bus->install_ram(0x40000, 0x7ffff, &m_ram[0]);
+ else
+ m_bus->install_ram(0x80000, 0xbffff, &m_ram[0]);
+}
+
+
+//**************************************************************************
+// APRICOT 128K RAM DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+static INPUT_PORTS_START( apricot_128k )
+ PORT_START("strap")
+ PORT_DIPNAME(0x03, 0x01, "Base Address")
+ PORT_DIPSETTING(0x00, "512K")
+ PORT_DIPSETTING(0x01, "256K - 384K")
+ PORT_DIPSETTING(0x02, "384K - 512K")
+INPUT_PORTS_END
+
+ioport_constructor apricot_128k_ram_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( apricot_128k );
+}
+
+//-------------------------------------------------
+// apricot_128_512k_ram_device - constructor
+//-------------------------------------------------
+
+apricot_128k_ram_device::apricot_128k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, APRICOT_128K_RAM, "Apricot 128/512K RAM Expansion Board (128K)", tag, owner, clock, "apricot_128k_ram", __FILE__),
+ device_apricot_expansion_card_interface(mconfig, *this),
+ m_strap(*this, "strap")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void apricot_128k_ram_device::device_start()
+{
+ m_ram.resize(0x20000 / 2);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void apricot_128k_ram_device::device_reset()
+{
+ if (m_strap->read() == 1)
+ m_bus->install_ram(0x40000, 0x5ffff, &m_ram[0]);
+ else if (m_strap->read() == 2)
+ m_bus->install_ram(0x60000, 0x7ffff, &m_ram[0]);
+}
+
+
+//**************************************************************************
+// APRICOT 512K RAM DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+static INPUT_PORTS_START( apricot_512k )
+ PORT_START("strap")
+ PORT_DIPNAME(0x03, 0x00, "Base Address")
+ PORT_DIPSETTING(0x00, "512K")
+ PORT_DIPSETTING(0x01, "256K - 384K")
+ PORT_DIPSETTING(0x02, "384K - 512K")
+INPUT_PORTS_END
+
+ioport_constructor apricot_512k_ram_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( apricot_512k );
+}
+
+//-------------------------------------------------
+// apricot_128_512k_ram_device - constructor
+//-------------------------------------------------
+
+apricot_512k_ram_device::apricot_512k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, APRICOT_512K_RAM, "Apricot 128/512K RAM Expansion Board (512K)", tag, owner, clock, "apricot_512k_ram", __FILE__),
+ device_apricot_expansion_card_interface(mconfig, *this),
+ m_strap(*this, "strap")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void apricot_512k_ram_device::device_start()
+{
+ m_ram.resize(0x80000 / 2);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void apricot_512k_ram_device::device_reset()
+{
+ if (m_strap->read() == 0)
+ m_bus->install_ram(0x40000, 0xbffff, &m_ram[0]);
+}