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author Robbbert <robbbert@users.noreply.github.com>2013-09-12 10:50:36 +0000
committer Robbbert <robbbert@users.noreply.github.com>2013-09-12 10:50:36 +0000
commit880a928455509cc0b447f5c9e996ded22778a60f (patch)
treee6a25fff472ac5694fcf3144ca8c1981555ce389
parent74c52058692c0828a5748026c251230bd01fc51e (diff)
(MESS) imsai : added devices (nw)
-rw-r--r--src/mess/drivers/imsai.c64
1 files changed, 60 insertions, 4 deletions
diff --git a/src/mess/drivers/imsai.c b/src/mess/drivers/imsai.c
index 541b631c1e2..08b293ca062 100644
--- a/src/mess/drivers/imsai.c
+++ b/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(0x13, 0x13) AM_READ(status_r)
- AM_RANGE(0x14, 0x14) AM_READ(keyin_r)
+ AM_RANGE(0x04, 0x04) AM_DEVREADWRITE("uart", i8251_device, data_r, data_w)
+ AM_RANGE(0x05, 0x05) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w)
+ 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 */