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megaphx stuff (nw)

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This commit is contained in:
David Haywood 2014-02-26 19:50:41 +00:00
parent 6a06d7604f
commit 01089de733
1 changed files with 61 additions and 5 deletions
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66
src/mame/drivers/megaphx.c
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@ -67,7 +67,8 @@ public:
m_maincpu(*this, "maincpu"),
m_mainram(*this, "mainram"),
m_vram(*this, "vram"),
m_ctc(*this, "ctc")
m_ctc(*this, "ctc"),
port_c_value(0)
{ }
required_device<cpu_device> m_maincpu;
@ -85,9 +86,17 @@ public:
DECLARE_READ16_MEMBER(tms_host_r);
DECLARE_WRITE16_MEMBER(tms_host_w);
DECLARE_READ16_MEMBER(megaphx_0x050002_r);
DECLARE_WRITE16_MEMBER(megaphx_0x050000_w);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to0);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to1);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to2);
DECLARE_READ8_MEMBER(port_c_r);
DECLARE_WRITE8_MEMBER(port_c_w);
UINT8 port_c_value;
};
@ -112,6 +121,20 @@ WRITE16_MEMBER(megaphx_state::tms_host_w)
tms34010_host_w(machine().device("tms"), offset, data);
}
READ16_MEMBER(megaphx_state::megaphx_0x050002_r)
{
int pc = machine().device("maincpu")->safe_pc();
logerror("(%06x) megaphx_0x050002_r (from z80?) %04x\n", pc, mem_mask);
return ioport("P3")->read();
}
WRITE16_MEMBER(megaphx_state::megaphx_0x050000_w)
{
int pc = machine().device("maincpu")->safe_pc();
logerror("(%06x) megaphx_0x050000_w (to z80?) %04x %04x\n", pc, data, mem_mask);
}
static ADDRESS_MAP_START( megaphx_68k_map, AS_PROGRAM, 16, megaphx_state )
@ -121,8 +144,8 @@ static ADDRESS_MAP_START( megaphx_68k_map, AS_PROGRAM, 16, megaphx_state )
AM_RANGE(0x040000, 0x040007) AM_READWRITE(tms_host_r, tms_host_w)
AM_RANGE(0x050000, 0x050001) AM_WRITENOP // z80 comms?
AM_RANGE(0x050002, 0x050003) AM_READ_PORT("P3") // z80 comms?
AM_RANGE(0x050000, 0x050001) AM_WRITE(megaphx_0x050000_w) // z80 comms?
AM_RANGE(0x050002, 0x050003) AM_READ(megaphx_0x050002_r) // z80 comms?
AM_RANGE(0x060000, 0x060007) AM_DEVREADWRITE8("ppi8255_0", i8255_device, read, write, 0x00ff)
@ -329,14 +352,47 @@ static RAMDAC_INTERFACE( ramdac_intf )
1
};
READ8_MEMBER(megaphx_state::port_c_r)
{
// it isn't a simple multiplex on this value.
//printf("read port c - write value was %02x\n", port_c_value);
int pc = machine().device("maincpu")->safe_pc();
logerror("(%06x) port_c_r (thru 8255)\n", pc);
return ioport("SYS")->read();
}
WRITE8_MEMBER(megaphx_state::port_c_w)
{
int pc = machine().device("maincpu")->safe_pc();
if((data != 0x0f) &&
(data != 0x4f) &&
(data != 0x8f) &&
(data != 0x9f) &&
(data != 0xcf) &&
(data != 0xdf) &&
(data != 0xff))
printf("(%06x) port_c_w (thru 8255) %02x\n", pc, data);
logerror("(%06x) port_c_w (thru 8255) %02x\n", pc, data);
port_c_value = (data & 0xf0) >> 4;
}
static I8255A_INTERFACE( ppi8255_intf_0 )
{
DEVCB_INPUT_PORT("P0"), /* Port A read */
DEVCB_NULL, /* Port A write */
DEVCB_INPUT_PORT("P1"), /* Port B read */
DEVCB_NULL, /* Port B write */
DEVCB_INPUT_PORT("SYS"), /* Port C read */
DEVCB_NULL /* Port C write */
DEVCB_DRIVER_MEMBER(megaphx_state,port_c_r), /* Port C read */
DEVCB_DRIVER_MEMBER(megaphx_state,port_c_w), /* Port C write */
};