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(MESS) MPU-401: Preliminary working MIDI out. [R. Belmont]

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This commit is contained in:
R. Belmont 2013-08-12 04:35:26 +00:00
parent 237e8e235f
commit 559f6d0fd0
2 changed files with 73 additions and 5 deletions
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70
src/mess/machine/mpu401.c
View File

@ -40,6 +40,8 @@
#define M6801_TAG "mpu6801"
#define ROM_TAG "mpurom"
#define MIDIIN_TAG "mdin"
#define MIDIOUT_TAG "mdout"
#define P2_SYNC_OUT (0x01)
#define P2_SYNC_IN (0x02)
@ -64,10 +66,32 @@ static ADDRESS_MAP_START( mpu401_io_map, AS_IO, 8, mpu401_device )
AM_RANGE(M6801_PORT2, M6801_PORT2) AM_READWRITE(port2_r, port2_w)
ADDRESS_MAP_END
static SLOT_INTERFACE_START(midiin_slot)
SLOT_INTERFACE("midiin", MIDIIN_PORT)
SLOT_INTERFACE_END
static const serial_port_interface midiin_intf =
{
DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, mpu401_device, midi_rx_w)
};
static SLOT_INTERFACE_START(midiout_slot)
SLOT_INTERFACE("midiout", MIDIOUT_PORT)
SLOT_INTERFACE_END
static const serial_port_interface midiout_intf =
{
DEVCB_NULL // midi out ports don't transmit inward
};
MACHINE_CONFIG_FRAGMENT( mpu401 )
MCFG_CPU_ADD(M6801_TAG, M6801, 4000000) /* 4 MHz as per schematics */
MCFG_CPU_PROGRAM_MAP(mpu401_map)
MCFG_CPU_IO_MAP(mpu401_io_map)
MCFG_M6801_SER_TX(WRITELINE(mpu401_device, mpu401_midi_tx))
MCFG_SERIAL_PORT_ADD(MIDIIN_TAG, midiin_intf, midiin_slot, "midiin")
MCFG_SERIAL_PORT_ADD(MIDIOUT_TAG, midiout_intf, midiout_slot, "midiout")
MACHINE_CONFIG_END
ROM_START( mpu401 )
@ -109,8 +133,9 @@ const rom_entry *mpu401_device::device_rom_region() const
//-------------------------------------------------
mpu401_device::mpu401_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, MPU401, "Roland MPU-401", tag, owner, clock, "mpu401", __FILE__),
device_t(mconfig, MPU401, "Roland MPU-401 I/O box", tag, owner, clock, "mpu401", __FILE__),
m_ourcpu(*this, M6801_TAG),
m_mdout(*this, MIDIOUT_TAG),
write_irq(*this)
{
}
@ -122,6 +147,7 @@ mpu401_device::mpu401_device(const machine_config &mconfig, const char *tag, dev
void mpu401_device::device_start()
{
write_irq.resolve_safe();
m_timer = timer_alloc(0, NULL);
}
//-------------------------------------------------
@ -130,10 +156,21 @@ void mpu401_device::device_start()
void mpu401_device::device_reset()
{
m_port2 = 0xff & ~P2_SRCK_OUT;
m_port2 = 0xff & ~(P2_SRCK_OUT | P2_MIDI_IN); // prevent spurious reception
m_command = 0;
m_mpudata = 0;
m_gatearrstat = 0;
m_timer->adjust(attotime::zero, 0, attotime::from_hz(31250*8));
}
//-------------------------------------------------
// device_timer - called when our device timer expires
//-------------------------------------------------
void mpu401_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr)
{
m_ourcpu->m6801_clock_serial();
}
READ8_MEMBER(mpu401_device::regs_mode2_r)
@ -179,18 +216,18 @@ READ8_MEMBER(mpu401_device::port1_r)
WRITE8_MEMBER(mpu401_device::port1_w)
{
printf("port1_w: %02x met %x syncout %x DSRD %d DRRD %d\n", data, data & 3, (data>>3) & 3, (data>>6) & 1, (data>>7) & 1);
// printf("port1_w: %02x met %x syncout %x DSRD %d DRRD %d\n", data, data & 3, (data>>3) & 3, (data>>6) & 1, (data>>7) & 1);
}
READ8_MEMBER(mpu401_device::port2_r)
{
printf("Read P2 (PC=%x)\n", space.device().safe_pc());
// printf("Read P2 (PC=%x)\n", space.device().safe_pc());
return m_port2;
}
WRITE8_MEMBER(mpu401_device::port2_w)
{
printf("port2_w: %02x SYCOUT %d SYCIN %d SRCK %d MIDI OUT %d\n", data, (data & 1), (data>>1) & 1, (data>>2) & 1, (data>>4) & 1);
// printf("port2_w: %02x SYCOUT %d SYCIN %d SRCK %d MIDI OUT %d\n", data, (data & 1), (data>>1) & 1, (data>>2) & 1, (data>>4) & 1);
}
READ8_MEMBER(mpu401_device::mpu_r)
@ -219,6 +256,10 @@ WRITE8_MEMBER(mpu401_device::mpu_w)
{
m_gatearrstat |= STAT_CMD_PORT;
}
else
{
m_gatearrstat &= ~STAT_CMD_PORT;
}
}
READ8_MEMBER(mpu401_device::asic_r)
@ -248,3 +289,22 @@ WRITE8_MEMBER(mpu401_device::asic_w)
}
}
// MIDI receive
WRITE_LINE_MEMBER( mpu401_device::midi_rx_w )
{
if (state == ASSERT_LINE)
{
m_port2 |= P2_MIDI_IN;
}
else
{
m_port2 &= ~P2_MIDI_IN;
}
}
// MIDI send
WRITE_LINE_MEMBER(mpu401_device::mpu401_midi_tx)
{
m_mdout->tx(state);
}

8
src/mess/machine/mpu401.h
View File

@ -5,6 +5,9 @@
#include "emu.h"
#include "cpu/m6800/m6800.h"
#include "machine/serial.h"
#include "machine/midiinport.h"
#include "machine/midioutport.h"
#define MCFG_MPU401_ADD(_tag, _irqf ) \
MCFG_DEVICE_ADD(_tag, MPU401, 0) \
@ -27,6 +30,7 @@ public:
virtual machine_config_constructor device_mconfig_additions() const;
required_device<m6801_cpu_device> m_ourcpu;
required_device<serial_port_device> m_mdout;
template<class _write> void set_irqf(_write wr)
{
@ -43,6 +47,8 @@ public:
DECLARE_WRITE8_MEMBER(port1_w);
DECLARE_READ8_MEMBER(port2_r);
DECLARE_WRITE8_MEMBER(port2_w);
DECLARE_WRITE_LINE_MEMBER(midi_rx_w);
DECLARE_WRITE_LINE_MEMBER(mpu401_midi_tx);
// public API - call for reads/writes at I/O 330/331 on PC, C0n0/C0n1 on Apple II, etc.
DECLARE_READ8_MEMBER(mpu_r);
@ -53,12 +59,14 @@ protected:
virtual void device_start();
virtual void device_reset();
virtual const rom_entry *device_rom_region() const;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
private:
UINT8 m_port2;
UINT8 m_command;
UINT8 m_mpudata;
UINT8 m_gatearrstat;
emu_timer *m_timer;
};
// device type definition