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-rw-r--r--src/devices/bus/crvision/rom.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/src/devices/bus/crvision/rom.c b/src/devices/bus/crvision/rom.c
new file mode 100644
index 00000000000..875a2b40fbc
--- /dev/null
+++ b/src/devices/bus/crvision/rom.c
@@ -0,0 +1,140 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+
+ V-Tech CreatiVision cart emulation
+
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "rom.h"
+
+
+//-------------------------------------------------
+// crvision_rom_device - constructor
+//-------------------------------------------------
+
+const device_type CRVISION_ROM_4K = &device_creator<crvision_rom_device>;
+const device_type CRVISION_ROM_6K = &device_creator<crvision_rom6k_device>;
+const device_type CRVISION_ROM_8K = &device_creator<crvision_rom8k_device>;
+const device_type CRVISION_ROM_10K = &device_creator<crvision_rom10k_device>;
+const device_type CRVISION_ROM_12K = &device_creator<crvision_rom12k_device>;
+const device_type CRVISION_ROM_16K = &device_creator<crvision_rom16k_device>;
+const device_type CRVISION_ROM_18K = &device_creator<crvision_rom18k_device>;
+
+
+crvision_rom_device::crvision_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_crvision_cart_interface(mconfig, *this)
+{
+}
+
+crvision_rom_device::crvision_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, CRVISION_ROM_4K, "CreatiVision 4K Carts", tag, owner, clock, "crvision_4k", __FILE__),
+ device_crvision_cart_interface(mconfig, *this)
+{
+}
+
+crvision_rom6k_device::crvision_rom6k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_6K, "CreatiVision 6K Carts", tag, owner, clock, "crvision_6k", __FILE__)
+{
+}
+
+crvision_rom8k_device::crvision_rom8k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_8K, "CreatiVision 8K Carts", tag, owner, clock, "crvision_8k", __FILE__)
+{
+}
+
+crvision_rom10k_device::crvision_rom10k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_10K, "CreatiVision 10K Carts", tag, owner, clock, "crvision_10k", __FILE__)
+{
+}
+
+crvision_rom12k_device::crvision_rom12k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_12K, "CreatiVision 12K Carts", tag, owner, clock, "crvision_12k", __FILE__)
+{
+}
+
+crvision_rom16k_device::crvision_rom16k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_16K, "CreatiVision 16K Carts", tag, owner, clock, "crvision_16k", __FILE__)
+{
+}
+
+crvision_rom18k_device::crvision_rom18k_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : crvision_rom_device(mconfig, CRVISION_ROM_18K, "CreatiVision 18K Carts", tag, owner, clock, "crvision_18k", __FILE__)
+{
+}
+
+
+/*-------------------------------------------------
+ mapper specific handlers
+ -------------------------------------------------*/
+
+READ8_MEMBER(crvision_rom_device::read_rom80)
+{
+ offset &= 0x1fff;
+ if (offset < 0x1000)
+ return 0xff;
+
+ return m_rom[offset & 0xfff];
+}
+
+
+READ8_MEMBER(crvision_rom6k_device::read_rom80)
+{
+ offset &= 0x1fff;
+ if (offset < 0x1000)
+ return m_rom[0x1000 + (offset & 0x7ff)];
+
+ return m_rom[offset & 0xfff];
+}
+
+
+READ8_MEMBER(crvision_rom8k_device::read_rom80)
+{
+ return m_rom[offset & 0x1fff];
+}
+
+
+READ8_MEMBER(crvision_rom10k_device::read_rom80)
+{
+ return m_rom[offset & 0x1fff];
+}
+
+READ8_MEMBER(crvision_rom10k_device::read_rom40)
+{
+ return m_rom[0x2000 + (offset & 0x7ff)];
+}
+
+
+READ8_MEMBER(crvision_rom12k_device::read_rom80)
+{
+ return m_rom[offset & 0x1fff];
+}
+
+READ8_MEMBER(crvision_rom12k_device::read_rom40)
+{
+ return m_rom[0x2000 + (offset & 0xfff)];
+}
+
+
+READ8_MEMBER(crvision_rom16k_device::read_rom80)
+{
+ // lower 8K in 0xa000-0xbfff, higher 8K in 0x8000-0x9fff
+ return m_rom[offset ^ 0x2000];
+}
+
+
+READ8_MEMBER(crvision_rom18k_device::read_rom80)
+{
+ // lower 8K in 0xa000-0xbfff, higher 8K in 0x8000-0x9fff
+ return m_rom[offset ^ 0x2000];
+}
+
+READ8_MEMBER(crvision_rom18k_device::read_rom40)
+{
+ return m_rom[0x4000 + (offset & 0x7ff)];
+}