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Diffstat (limited to 'src/devices/bus/z88/rom.c')
-rw-r--r--src/devices/bus/z88/rom.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/src/devices/bus/z88/rom.c b/src/devices/bus/z88/rom.c
new file mode 100644
index 00000000000..4ebdef5fc85
--- /dev/null
+++ b/src/devices/bus/z88/rom.c
@@ -0,0 +1,89 @@
+// license:BSD-3-Clause
+// copyright-holders:Sandro Ronco
+/***************************************************************************
+
+ rom.c
+
+ Z88 ROM cartridges emulation
+
+***************************************************************************/
+
+#include "emu.h"
+#include "rom.h"
+
+/***************************************************************************
+ IMPLEMENTATION
+***************************************************************************/
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type Z88_32K_ROM = &device_creator<z88_32k_rom_device>;
+const device_type Z88_128K_ROM = &device_creator<z88_128k_rom_device>;
+const device_type Z88_256K_ROM = &device_creator<z88_256k_rom_device>;
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// z88_32k_rom_device - constructor
+//-------------------------------------------------
+
+z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, Z88_32K_ROM, "Z88 32KB ROM", tag, owner, clock, "z88_32k_rom", __FILE__),
+ device_z88cart_interface( mconfig, *this )
+{
+}
+
+z88_32k_rom_device::z88_32k_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source)
+ : device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_z88cart_interface( mconfig, *this )
+{
+}
+
+//-------------------------------------------------
+// z88_128k_rom_device - constructor
+//-------------------------------------------------
+
+z88_128k_rom_device::z88_128k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : z88_32k_rom_device(mconfig, Z88_128K_ROM, "Z88 128KB ROM", tag, owner, clock, "z88_128k_rom", __FILE__)
+{
+}
+
+//-------------------------------------------------
+// z88_256k_rom_device - constructor
+//-------------------------------------------------
+
+z88_256k_rom_device::z88_256k_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : z88_32k_rom_device(mconfig, Z88_256K_ROM, "Z88 256KB ROM", tag, owner, clock, "z88_256k_rom", __FILE__)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void z88_32k_rom_device::device_start()
+{
+ m_rom = machine().memory().region_alloc(tag(), get_cart_size(), 1, ENDIANNESS_LITTLE)->base();
+}
+
+/*-------------------------------------------------
+ get_cart_base
+-------------------------------------------------*/
+
+UINT8* z88_32k_rom_device::get_cart_base()
+{
+ return m_rom;
+}
+
+/*-------------------------------------------------
+ read
+-------------------------------------------------*/
+
+READ8_MEMBER(z88_32k_rom_device::read)
+{
+ return m_rom[offset & (get_cart_size() - 1)];
+}