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Diffstat (limited to 'src/devices/bus/tiki100/8088.cpp')
-rw-r--r--src/devices/bus/tiki100/8088.cpp176
1 files changed, 176 insertions, 0 deletions
diff --git a/src/devices/bus/tiki100/8088.cpp b/src/devices/bus/tiki100/8088.cpp
new file mode 100644
index 00000000000..d8c9fe201b5
--- /dev/null
+++ b/src/devices/bus/tiki100/8088.cpp
@@ -0,0 +1,176 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ TIKI-100 8/16 8088/8087 expansion card emulation
+
+**********************************************************************/
+
+#include "8088.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define I8088_TAG "u3"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type TIKI100_8088 = &device_creator<tiki100_8088_t>;
+
+
+//-------------------------------------------------
+// ROM( tiki100_8088 )
+//-------------------------------------------------
+
+ROM_START( tiki100_8088 )
+ ROM_REGION( 0x1000, I8088_TAG, 0 )
+ ROM_LOAD( "boot 1.0.u3", 0x0000, 0x1000, CRC(436974aa) SHA1(837087b3ab982d047e4f15799fef3daa37dd6c01) )
+
+ ROM_REGION( 0x100, "u26", 0 )
+ ROM_LOAD( "53ls140.u26", 0x000, 0x100, CRC(fc5902e1) SHA1(afb9cb54ab6fc449e7544ddb3cbebc3770c4f937) )
+ROM_END
+
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *tiki100_8088_t::device_rom_region() const
+{
+ return ROM_NAME( tiki100_8088 );
+}
+
+
+static ADDRESS_MAP_START( i8088_mem, AS_PROGRAM, 8, tiki100_8088_t )
+ AM_RANGE(0x00000, 0xbffff) AM_RAM
+ AM_RANGE(0xc0000, 0xcffff) AM_DEVREADWRITE(":" TIKI100_BUS_TAG, tiki100_bus_t, exin_mrq_r, exin_mrq_w)
+ AM_RANGE(0xff000, 0xfffff) AM_ROM AM_REGION(I8088_TAG, 0)
+ADDRESS_MAP_END
+
+
+static ADDRESS_MAP_START( i8088_io, AS_IO, 8, tiki100_8088_t )
+ AM_RANGE(0x7f, 0x7f) AM_READWRITE(read, write)
+ADDRESS_MAP_END
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG_FRAGMENT( tiki100_8088 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( tiki100_8088 )
+ MCFG_CPU_ADD(I8088_TAG, I8088, 6000000)
+ MCFG_CPU_PROGRAM_MAP(i8088_mem)
+ MCFG_CPU_IO_MAP(i8088_io)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor tiki100_8088_t::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( tiki100_8088 );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// tiki100_8088_t - constructor
+//-------------------------------------------------
+
+tiki100_8088_t::tiki100_8088_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, TIKI100_8088, "TIKI-100 8/16", tag, owner, clock, "tiki100_8088", __FILE__),
+ device_tiki100bus_card_interface(mconfig, *this),
+ m_maincpu(*this, I8088_TAG),
+ m_data(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void tiki100_8088_t::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void tiki100_8088_t::device_reset()
+{
+ m_maincpu->reset();
+
+ m_data = 0;
+}
+
+
+//-------------------------------------------------
+// tiki100bus_iorq_r - I/O read
+//-------------------------------------------------
+
+UINT8 tiki100_8088_t::iorq_r(address_space &space, offs_t offset, UINT8 data)
+{
+ if ((offset & 0xff) == 0x7f)
+ {
+ data = m_data;
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// tiki100bus_iorq_w - I/O write
+//-------------------------------------------------
+
+void tiki100_8088_t::iorq_w(address_space &space, offs_t offset, UINT8 data)
+{
+ if ((offset & 0xff) == 0x7f)
+ {
+ m_data = data & 0x0f;
+
+ if (BIT(data, 5))
+ {
+ device_reset();
+ }
+ }
+}
+
+
+//-------------------------------------------------
+// read -
+//-------------------------------------------------
+
+READ8_MEMBER( tiki100_8088_t::read )
+{
+ return m_busak << 4 | m_data;
+}
+
+
+//-------------------------------------------------
+// write -
+//-------------------------------------------------
+
+WRITE8_MEMBER( tiki100_8088_t::write )
+{
+ m_data = data & 0x0f;
+
+ m_bus->busrq_w(BIT(data, 4));
+}