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-rw-r--r--src/mess/machine/abc_sio.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/src/mess/machine/abc_sio.c b/src/mess/machine/abc_sio.c
new file mode 100644
index 00000000000..2fd4366d4c4
--- /dev/null
+++ b/src/mess/machine/abc_sio.c
@@ -0,0 +1,196 @@
+/*
+ABC SIO
+
+PCB Layout
+----------
+
+ |-------------------------------------------|
+|-| |
+|-| |
+|-| Z80SIO CN2 |
+|-| |
+|-| 4.9152MHz |
+|-| |
+|-| ROM0 Z80CTC |
+|-| CN1 |
+|-| ROM1 |
+ |-------------------------------------------|
+
+Notes:
+ Relevant IC's shown.
+
+ ROM0 - Hitachi HN462716 2Kx8 EPROM "SYN 1.6"
+ ROM1 - Mitsubishi MB8516 2Kx8 EPROM "T80 1.3"
+ Z80SIO - Zilog Z-80A SIO/0
+ Z80CTC - Zilog Z-80A CTC
+ CN1 - DB9 serial connector
+ CN2 - DB25 serial connector
+
+*/
+
+#include "abc_sio.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define Z80CTC_TAG "z80ctc"
+#define Z80SIO_TAG "z80sio"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type ABC_SIO = &device_creator<abc_sio_device>;
+
+
+//-------------------------------------------------
+// ROM( abc_sio )
+//-------------------------------------------------
+
+ROM_START( abc_sio )
+ ROM_REGION( 0x1000, "abc80", 0 )
+ ROM_LOAD( "t80 1.3", 0x000, 0x800, CRC(f20ff827) SHA1(a1c4af1c374184a14872d7253d6f9e470603117f) )
+ ROM_LOAD( "syn 1.6", 0x800, 0x800, CRC(7bd96b75) SHA1(d1f9b16530be28b03eeddb3f6ee4fa9e1cc9458e) )
+ROM_END
+
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *abc_sio_device::device_rom_region() const
+{
+ return ROM_NAME( abc_sio );
+}
+
+
+//-------------------------------------------------
+// Z80CTC_INTERFACE( ctc_intf )
+//-------------------------------------------------
+
+static Z80CTC_INTERFACE( ctc_intf )
+{
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL
+};
+
+
+//-------------------------------------------------
+// Z80DART_INTERFACE( sio_intf )
+//-------------------------------------------------
+
+static Z80DART_INTERFACE( sio_intf )
+{
+ 0, 0, 0, 0,
+
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+
+ DEVCB_NULL
+};
+
+
+//-------------------------------------------------
+// MACHINE_DRIVER( abc_sio )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( abc_sio )
+ MCFG_Z80CTC_ADD(Z80CTC_TAG, XTAL_4_9152MHz, ctc_intf)
+ MCFG_Z80DART_ADD(Z80SIO_TAG, 0, sio_intf)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor abc_sio_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( abc_sio );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// abc_sio_device - constructor
+//-------------------------------------------------
+
+abc_sio_device::abc_sio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, ABC_SIO, "ABC SIO", tag, owner, clock),
+ device_abcbus_card_interface(mconfig, *this),
+ m_ctc(*this, Z80CTC_TAG),
+ m_sio(*this, Z80SIO_TAG)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void abc_sio_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void abc_sio_device::device_reset()
+{
+}
+
+
+
+//**************************************************************************
+// ABC BUS INTERFACE
+//**************************************************************************
+
+//-------------------------------------------------
+// abcbus_cs -
+//-------------------------------------------------
+
+void abc_sio_device::abcbus_cs(UINT8 data)
+{
+}
+
+
+//-------------------------------------------------
+// abcbus_xmemfl -
+//-------------------------------------------------
+
+UINT8 abc_sio_device::abcbus_xmemfl(offs_t offset)
+{
+ UINT8 data = 0xff;
+
+ if (offset >= 0x4000 && offset < 0x5000) // TODO where is this mapped?
+ {
+ data = memregion("abc80")->base()[offset & 0xfff];
+ }
+
+ return data;
+}