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(MESS) mbc200 : connected handshaking to ppi

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This commit is contained in:
Robbbert 2014-05-20 11:15:26 +00:00
parent 9c6c6278e6
commit d6ad896274
1 changed files with 20 additions and 28 deletions
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48
src/mess/drivers/mbc200.c
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@ -47,7 +47,7 @@ public:
: driver_device(mconfig, type, tag)
, m_palette(*this, "palette")
, m_crtc(*this, "crtc")
, m_ppi(*this, "ppi8255_2")
, m_ppi_m(*this, "ppi_m")
, m_vram(*this, "vram")
, m_maincpu(*this, "maincpu")
, m_fdc(*this, "fdc")
@ -57,19 +57,17 @@ public:
, m_floppy1(*this, FLOPPY_1)
{ }
DECLARE_READ8_MEMBER(from_master_r);
DECLARE_WRITE8_MEMBER(porta_w);
DECLARE_READ8_MEMBER(ppi_hs_r);
DECLARE_READ8_MEMBER(p2_porta_r);
DECLARE_WRITE8_MEMBER(pm_porta_w);
MC6845_UPDATE_ROW(update_row);
required_device<palette_device> m_palette;
private:
virtual void machine_start();
virtual void machine_reset();
UINT8 m_hs_bit;
UINT8 m_comm_latch;
required_device<mc6845_device> m_crtc;
required_device<i8255_device> m_ppi;
required_device<i8255_device> m_ppi_m;
required_shared_ptr<UINT8> m_vram;
required_device<cpu_device> m_maincpu;
//required_device<mb8876_t> m_fdc;
@ -87,9 +85,11 @@ static ADDRESS_MAP_START(mbc200_mem, AS_PROGRAM, 8, mbc200_state)
AM_RANGE( 0x1000, 0xffff ) AM_RAM
ADDRESS_MAP_END
READ8_MEMBER( mbc200_state::ppi_hs_r )
WRITE8_MEMBER( mbc200_state::pm_porta_w )
{
return (m_ppi->read(space, 2) & 0x7f) | m_hs_bit;
machine().scheduler().synchronize(); // force resync
printf("A %02x %c\n",data,data);
m_comm_latch = data; // to slave CPU
}
static ADDRESS_MAP_START( mbc200_io , AS_IO, 8, mbc200_state)
@ -99,8 +99,7 @@ static ADDRESS_MAP_START( mbc200_io , AS_IO, 8, mbc200_state)
AM_RANGE(0xe1, 0xe1) AM_DEVREADWRITE("i8251_1", i8251_device, status_r, control_w)
//AM_RANGE(0xe4, 0xe7) AM_DEVREADWRITE("fdc", mb8876_t, read, write)
AM_RANGE(0xe4, 0xe7) AM_DEVREADWRITE("fdc", mb8876_device, read, write)
AM_RANGE(0xea, 0xea) AM_READ(ppi_hs_r)
AM_RANGE(0xe8, 0xeb) AM_DEVREADWRITE("ppi8255_2", i8255_device, read, write)
AM_RANGE(0xe8, 0xeb) AM_DEVREADWRITE("ppi_m", i8255_device, read, write)
AM_RANGE(0xec, 0xec) AM_DEVREADWRITE("i8251_2", i8251_device, data_r, data_w)
AM_RANGE(0xed, 0xed) AM_DEVREADWRITE("i8251_2", i8251_device, status_r, control_w)
ADDRESS_MAP_END
@ -114,24 +113,22 @@ static ADDRESS_MAP_START(mbc200_sub_mem, AS_PROGRAM, 8, mbc200_state)
AM_RANGE( 0x8000, 0xffff ) AM_RAM AM_SHARE("vram")
ADDRESS_MAP_END
READ8_MEMBER(mbc200_state::from_master_r)
READ8_MEMBER(mbc200_state::p2_porta_r)
{
UINT8 tmp;
machine().scheduler().synchronize(); // force resync
tmp = m_comm_latch;
UINT8 tmp = m_comm_latch;
m_comm_latch = 0;
m_hs_bit |= 0x80;
m_ppi_m->pc6_w(0); // ppi_ack
return tmp;
}
static ADDRESS_MAP_START( mbc200_sub_io , AS_IO, 8, mbc200_state)
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x70, 0x73) AM_DEVREADWRITE("ppi8255_1", i8255_device, read, write)
AM_RANGE(0x70, 0x73) AM_DEVREADWRITE("ppi_1", i8255_device, read, write)
AM_RANGE(0xb0, 0xb0) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
AM_RANGE(0xb1, 0xb1) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
// AM_RANGE(0xd0, 0xd3) AM_DEVREADWRITE("ppi8255_2", i8255_device, read, write)
AM_RANGE(0xd0, 0xd0) AM_READ(from_master_r)
AM_RANGE(0xd0, 0xd3) AM_DEVREADWRITE("ppi_2", i8255_device, read, write)
ADDRESS_MAP_END
/* Input ports */
@ -154,14 +151,6 @@ void mbc200_state::machine_start()
m_floppy1->floppy_drive_set_ready_state(1, 1);
}
WRITE8_MEMBER( mbc200_state::porta_w )
{
machine().scheduler().synchronize(); // force resync
printf("A %02x %c\n",data,data);
m_comm_latch = data; // to slave CPU
m_hs_bit &= ~0x80;
}
void mbc200_state::machine_reset()
{
UINT8* roms = memregion("roms")->base();
@ -243,10 +232,13 @@ static MACHINE_CONFIG_START( mbc200, mbc200_state )
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_MC6845_UPDATE_ROW_CB(mbc200_state, update_row)
MCFG_DEVICE_ADD("ppi8255_1", I8255, 0)
MCFG_DEVICE_ADD("ppi_1", I8255, 0)
MCFG_DEVICE_ADD("ppi8255_2", I8255, 0)
MCFG_I8255_OUT_PORTA_CB(WRITE8(mbc200_state, porta_w))
MCFG_DEVICE_ADD("ppi_2", I8255, 0)
MCFG_I8255_IN_PORTA_CB(READ8(mbc200_state, p2_porta_r))
MCFG_DEVICE_ADD("ppi_m", I8255, 0)
MCFG_I8255_OUT_PORTA_CB(WRITE8(mbc200_state, pm_porta_w))
MCFG_DEVICE_ADD("i8251_1", I8251, 0) // INS8251N
MCFG_DEVICE_ADD("i8251_2", I8251, 0) // INS8251A