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-rw-r--r--src/mess/machine/iq151_rom.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/src/mess/machine/iq151_rom.c b/src/mess/machine/iq151_rom.c
new file mode 100644
index 00000000000..350a11072a9
--- /dev/null
+++ b/src/mess/machine/iq151_rom.c
@@ -0,0 +1,227 @@
+/***************************************************************************
+
+ IQ151 rom cartridge emulation
+
+ Supported cart:
+ - BASIC6
+ - BASICG
+ - AMOS OS (3 cart)
+
+***************************************************************************/
+
+#include "emu.h"
+#include "iq151_rom.h"
+
+/***************************************************************************
+ IMPLEMENTATION
+***************************************************************************/
+
+ROM_START( iq151_rom )
+ ROM_REGION(0x4000, "rom", ROMREGION_ERASEFF)
+ROM_END
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type IQ151_BASIC6 = &device_creator<iq151_basic6_device>;
+const device_type IQ151_BASICG = &device_creator<iq151_basicg_device>;
+const device_type IQ151_AMOS1 = &device_creator<iq151_amos1_device>;
+const device_type IQ151_AMOS2 = &device_creator<iq151_amos2_device>;
+const device_type IQ151_AMOS3 = &device_creator<iq151_amos3_device>;
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_rom_device - constructor
+//-------------------------------------------------
+
+iq151_rom_device::iq151_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, type, name, tag, owner, clock),
+ device_iq151cart_interface(mconfig, *this)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void iq151_rom_device::device_start()
+{
+ m_rom = (UINT8*)memregion("rom")->base();
+}
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *iq151_rom_device::device_rom_region() const
+{
+ return ROM_NAME( iq151_rom );
+}
+
+/*-------------------------------------------------
+ get_cart_base
+-------------------------------------------------*/
+
+UINT8* iq151_rom_device::get_cart_base()
+{
+ return m_rom;
+}
+
+
+//**************************************************************************
+// BASIC6
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_basic6_device - constructor
+//-------------------------------------------------
+
+iq151_basic6_device::iq151_basic6_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : iq151_rom_device(mconfig, IQ151_BASIC6, "IQ151 BASIC6", tag, owner, clock)
+{
+}
+
+
+//-------------------------------------------------
+// read
+//-------------------------------------------------
+
+void iq151_basic6_device::read(offs_t offset, UINT8 &data)
+{
+ if (offset >= 0xc800 && offset < 0xe800)
+ data = m_rom[offset - 0xc800];
+}
+
+
+//**************************************************************************
+// BASICG
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_basicg_device - constructor
+//-------------------------------------------------
+
+iq151_basicg_device::iq151_basicg_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : iq151_rom_device(mconfig, IQ151_BASICG, "IQ151 BASICG", tag, owner, clock)
+{
+}
+
+/*-------------------------------------------------
+ read
+-------------------------------------------------*/
+
+void iq151_basicg_device::read(offs_t offset, UINT8 &data)
+{
+ if (offset >= 0xb000 && offset < 0xc000)
+ data = m_rom[offset & 0x0fff];
+ else if (offset >= 0xc800 && offset < 0xe800)
+ data = m_rom[offset - 0xb800];
+}
+
+
+//**************************************************************************
+// AMOS cartridge 1
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_amos1_device - constructor
+//-------------------------------------------------
+
+iq151_amos1_device::iq151_amos1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : iq151_rom_device(mconfig, IQ151_AMOS1, "IQ151 AMOS cart 1", tag, owner, clock),
+ m_active(true)
+{
+}
+
+/*-------------------------------------------------
+ read
+-------------------------------------------------*/
+
+void iq151_amos1_device::read(offs_t offset, UINT8 &data)
+{
+ if (offset >= 0x8000 && offset < 0xc000 && m_active)
+ data = m_rom[offset & 0x3fff];
+}
+
+/*-------------------------------------------------
+ IO write
+-------------------------------------------------*/
+
+void iq151_amos1_device::io_write(offs_t offset, UINT8 data)
+{
+ if (offset >= 0xec && offset < 0xf0)
+ m_active = data == 0x00;
+}
+
+//**************************************************************************
+// AMOS cartridge 2
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_amos2_device - constructor
+//-------------------------------------------------
+
+iq151_amos2_device::iq151_amos2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : iq151_rom_device(mconfig, IQ151_AMOS2, "IQ151 AMOS cart 2", tag, owner, clock),
+ m_active(false)
+{
+}
+
+/*-------------------------------------------------
+ read
+-------------------------------------------------*/
+
+void iq151_amos2_device::read(offs_t offset, UINT8 &data)
+{
+ if (offset >= 0x8000 && offset < 0xc000 && m_active)
+ data = m_rom[offset & 0x3fff];
+}
+
+/*-------------------------------------------------
+ IO write
+-------------------------------------------------*/
+
+void iq151_amos2_device::io_write(offs_t offset, UINT8 data)
+{
+ if (offset >= 0xec && offset < 0xf0)
+ m_active = data == 0x01;
+}
+
+//**************************************************************************
+// AMOS cartridge 3
+//**************************************************************************
+
+//-------------------------------------------------
+// iq151_amos3_device - constructor
+//-------------------------------------------------
+
+iq151_amos3_device::iq151_amos3_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : iq151_rom_device(mconfig, IQ151_AMOS3, "IQ151 AMOS cart 3", tag, owner, clock),
+ m_active(true)
+{
+}
+
+/*-------------------------------------------------
+ read
+-------------------------------------------------*/
+
+void iq151_amos3_device::read(offs_t offset, UINT8 &data)
+{
+ if (offset >= 0x8000 && offset < 0xc000 && m_active)
+ data = m_rom[offset & 0x3fff];
+}
+
+/*-------------------------------------------------
+ IO write
+-------------------------------------------------*/
+
+void iq151_amos3_device::io_write(offs_t offset, UINT8 data)
+{
+ if (offset >= 0xec && offset < 0xf0)
+ m_active = data == 0x02;
+}