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-rw-r--r--src/devices/bus/electron/cart/std.cpp56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/devices/bus/electron/cart/std.cpp b/src/devices/bus/electron/cart/std.cpp
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index 00000000000..b66e3b2ce0d
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+++ b/src/devices/bus/electron/cart/std.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/***************************************************************************
+
+ Acorn Electron standard cartridge emulation
+
+***************************************************************************/
+
+#include "emu.h"
+#include "std.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(ELECTRON_STDCART, electron_stdcart_device, "electron_stdcart", "Electron standard cartridge")
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// electron_stdcart_device - constructor
+//-------------------------------------------------
+
+electron_stdcart_device::electron_stdcart_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ELECTRON_STDCART, tag, owner, clock)
+ , device_electron_cart_interface(mconfig, *this)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void electron_stdcart_device::device_start()
+{
+}
+
+//-------------------------------------------------
+// read - cartridge data read
+//-------------------------------------------------
+
+uint8_t electron_stdcart_device::read(address_space &space, offs_t offset, int infc, int infd, int romqa)
+{
+ uint8_t data = 0xff;
+
+ if (!infc && !infd)
+ {
+ data = m_rom[(offset & 0x3fff) + (romqa * 0x4000)];
+ }
+
+ return data;
+}