(MESS) imsai : added devices (nw)

src/mess/drivers/imsai.c

@@ -8,10 +8,17 @@
 
     Press any key to start the monitor program.
 
+    ToDo:
+    - Banking
+    - Connect PIT to UART clock.
+    - Dipswitches
+
 ****************************************************************************/
 
 #include "emu.h"
 #include "cpu/i8085/i8085.h"
+#include "machine/i8251.h"
+#include "machine/pit8253.h"
 #include "machine/terminal.h"
 
 
@@ -22,23 +29,29 @@ public:
 		: driver_device(mconfig, type, tag)
 		, m_maincpu(*this, "maincpu")
 		, m_terminal(*this, TERMINAL_TAG)
+		, m_uart(*this, "uart")
+		, m_pit(*this, "pit")
 	{ }
 
 	DECLARE_WRITE8_MEMBER(kbd_put);
 	DECLARE_READ8_MEMBER(keyin_r);
 	DECLARE_READ8_MEMBER(status_r);
+	DECLARE_WRITE8_MEMBER(control_w);
 private:
 	UINT8 m_term_data;
 	virtual void machine_reset();
 	required_device<cpu_device> m_maincpu;
 	required_device<generic_terminal_device> m_terminal;
+	required_device<i8251_device> m_uart;
+	required_device<pit8253_device> m_pit;
 };
 
 
 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(0xd000, 0xd0ff) AM_RAM
+	AM_RANGE(0xd100, 0xd103) AM_DEVREADWRITE("pit", pit8253_device, read, write)
 	AM_RANGE(0xd800, 0xdfff) AM_ROM AM_REGION("roms", 0)
 ADDRESS_MAP_END
 
@@ -47,10 +60,13 @@ static ADDRESS_MAP_START(imsai_io, AS_IO, 8, imsai_state)
 	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(0x04, 0x04) AM_DEVREADWRITE("uart", i8251_device, data_r, data_w)
-	AM_RANGE(0x13, 0x13) AM_READ(status_r)
+	AM_RANGE(0x05, 0x05) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w)
-	AM_RANGE(0x14, 0x14) AM_READ(keyin_r)
+	AM_RANGE(0x12, 0x12) AM_DEVREADWRITE("uart", i8251_device, data_r, data_w)
+	AM_RANGE(0x13, 0x13) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w)
+	AM_RANGE(0x14, 0x14) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
 	AM_RANGE(0x15, 0x15) AM_READ(status_r)
+	AM_RANGE(0xf3, 0xf3) AM_WRITE(control_w)
 ADDRESS_MAP_END
 
 /* Input ports */
@@ -79,6 +95,42 @@ static GENERIC_TERMINAL_INTERFACE( terminal_intf )
 	DEVCB_DRIVER_MEMBER(imsai_state, kbd_put)
 };
 
+static const i8251_interface uart_intf =
+{
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
+};
+
+static const struct pit8253_interface pit_intf =
+{
+	{
+		{
+			XTAL_6MHz / 3,                /* Timer 0: baud rate gen for 8251 */
+			DEVCB_NULL,
+			DEVCB_NULL
+		}, {
+			XTAL_6MHz / 3,                /* Timer 1: user */
+			DEVCB_NULL,
+			DEVCB_NULL
+		}, {
+			XTAL_6MHz / 3,                /* Timer 2: user */
+			DEVCB_NULL,
+			DEVCB_NULL
+		}
+	}
+};
+
+WRITE8_MEMBER( imsai_state::control_w )
+{
+}
+
 void imsai_state::machine_reset()
 {
 	m_term_data = 0;
@@ -92,6 +144,10 @@ static MACHINE_CONFIG_START( imsai, imsai_state )
 
 	/* video hardware */
 	MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
+
+	/* Devices */
+	MCFG_I8251_ADD("uart", uart_intf)
+	MCFG_PIT8253_ADD( "pit", pit_intf)
 MACHINE_CONFIG_END
 
 /* ROM definition */