(MESS) New skeleton [Robbbert]

-------------------------------------------------
Imsai MPU-B

.gitattributes

@@ -6327,6 +6327,7 @@ src/mess/drivers/ibmpc.c svneol=native#text/plain
 src/mess/drivers/ie15.c svneol=native#text/plain
 src/mess/drivers/if800.c svneol=native#text/plain
 src/mess/drivers/imds.c svneol=native#text/plain
+src/mess/drivers/imsai.c svneol=native#text/plain
 src/mess/drivers/indiana.c svneol=native#text/plain
 src/mess/drivers/instruct.c svneol=native#text/plain
 src/mess/drivers/interact.c svneol=native#text/plain

src/mess/drivers/imsai.c

@@ -0,0 +1,106 @@
+/***************************************************************************
+
+    Imsai MPU-B. One of the earliest single-board computers on a S100 card.
+
+    2013-09-11 Skeleton driver.
+
+    Chips used: i8085, i8251, i8253, 3622 fusable prom. XTAL 6MHz
+
+    Press any key to start the monitor program.
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/terminal.h"
+
+
+class imsai_state : public driver_device
+{
+public:
+	imsai_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_maincpu(*this, "maincpu")
+		, m_terminal(*this, TERMINAL_TAG)
+	{ }
+
+	DECLARE_WRITE8_MEMBER(kbd_put);
+	DECLARE_READ8_MEMBER(keyin_r);
+	DECLARE_READ8_MEMBER(status_r);
+private:
+	UINT8 m_term_data;
+	virtual void machine_reset();
+	required_device<cpu_device> m_maincpu;
+	required_device<generic_terminal_device> m_terminal;
+};
+
+
+static ADDRESS_MAP_START(imsai_mem, AS_PROGRAM, 8, imsai_state)
+	ADDRESS_MAP_UNMAP_HIGH
+	AM_RANGE(0x0000, 0x07ff) AM_ROM AM_REGION("roms", 0)
+	AM_RANGE(0xd000, 0xd7ff) AM_RAM
+	AM_RANGE(0xd800, 0xdfff) AM_ROM AM_REGION("roms", 0)
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(imsai_io, AS_IO, 8, imsai_state)
+	ADDRESS_MAP_UNMAP_HIGH
+	ADDRESS_MAP_GLOBAL_MASK(0xff)
+	AM_RANGE(0x02, 0x02) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
+	AM_RANGE(0x03, 0x03) AM_READ(status_r)
+	AM_RANGE(0x12, 0x12) AM_READ(keyin_r)
+	AM_RANGE(0x13, 0x13) AM_READ(status_r)
+	AM_RANGE(0x14, 0x14) AM_READ(keyin_r)
+	AM_RANGE(0x15, 0x15) AM_READ(status_r)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( imsai )
+INPUT_PORTS_END
+
+READ8_MEMBER( imsai_state::keyin_r )
+{
+	UINT8 ret = m_term_data;
+	m_term_data = 0;
+	return ret;
+}
+
+READ8_MEMBER( imsai_state::status_r )
+{
+	return (m_term_data) ? 3 : 1;
+}
+
+WRITE8_MEMBER( imsai_state::kbd_put )
+{
+	m_term_data = data;
+}
+
+static GENERIC_TERMINAL_INTERFACE( terminal_intf )
+{
+	DEVCB_DRIVER_MEMBER(imsai_state, kbd_put)
+};
+
+void imsai_state::machine_reset()
+{
+	m_term_data = 0;
+}
+
+static MACHINE_CONFIG_START( imsai, imsai_state )
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu",I8085A, XTAL_6MHz)
+	MCFG_CPU_PROGRAM_MAP(imsai_mem)
+	MCFG_CPU_IO_MAP(imsai_io)
+
+	/* video hardware */
+	MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( imsai )
+	ROM_REGION( 0x800, "roms", 0 )
+	ROM_LOAD( "vdb-80.rom",   0x0000, 0x0800, CRC(0afc4683) SHA1(a5419aaee00badf339d7c627f50ef8b2538e42e2) )
+ROM_END
+
+/* Driver */
+
+/*    YEAR  NAME     PARENT  COMPAT   MACHINE    INPUT  CLASS         INIT  COMPANY  FULLNAME   FLAGS */
+COMP( 1978, imsai,   0,      0,       imsai,     imsai, driver_device, 0,   "Imsai", "MPU-B", GAME_NOT_WORKING | GAME_NO_SOUND_HW )

src/mess/mess.lst

@@ -2265,3 +2265,5 @@ ampro
 pm68k
 lft1230
 lft1510
+imsai
+

src/mess/mess.mak

@@ -2400,6 +2400,7 @@ $(MESSOBJ)/skeleton.a:          \
 	$(MESS_DRIVERS)/ibm6580.o   \
 	$(MESS_DRIVERS)/ie15.o      \
 	$(MESS_DRIVERS)/if800.o     \
+	$(MESS_DRIVERS)/imsai.o     \
 	$(MESS_DRIVERS)/indiana.o   \
 	$(MESS_DRIVERS)/itt3030.o   \
 	$(MESS_DRIVERS)/konin.o     \