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tti: Fix ASC addressing; add more handlers (nw)

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This commit is contained in:
AJR 2019-03-09 17:18:26 -05:00
parent 12be4c9efe
commit 41fb106f07
1 changed files with 63 additions and 1 deletions
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64
src/mame/drivers/tti.cpp
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@ -32,11 +32,22 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_mfp(*this, "mfp")
, m_asc(*this, "scsibus:7:asc")
, m_dma_address(0)
{ }
void tti(machine_config &config);
protected:
virtual void machine_start() override;
private:
u8 asc_r(offs_t offset);
void asc_w(offs_t offset, u8 data);
void dma_address_w(offs_t offset, u8 data);
u8 io_status_r();
void channel_w(u8 data);
void asc_config(device_t *device);
IRQ_CALLBACK_MEMBER(intack);
@ -45,8 +56,16 @@ private:
required_device<cpu_device> m_maincpu;
required_device<mc68901_device> m_mfp;
required_device<ncr53c90a_device> m_asc;
u32 m_dma_address;
};
void tti_state::machine_start()
{
save_item(NAME(m_dma_address));
}
IRQ_CALLBACK_MEMBER(tti_state::intack)
{
return m_mfp->get_vector();
@ -55,13 +74,56 @@ IRQ_CALLBACK_MEMBER(tti_state::intack)
static INPUT_PORTS_START( tti )
INPUT_PORTS_END
u8 tti_state::asc_r(offs_t offset)
{
return m_asc->read(offset ^ 1);
}
void tti_state::asc_w(offs_t offset, u8 data)
{
m_asc->write(offset ^ 1, data);
}
void tti_state::dma_address_w(offs_t offset, u8 data)
{
m_dma_address &= ~(0xff000000 >> (offset * 8));
m_dma_address |= u32(data) << (24 - offset * 8);
}
u8 tti_state::io_status_r()
{
return 0;
}
void tti_state::channel_w(u8 data)
{
switch (data & 0x03)
{
case 0:
m_mfp->i4_w(0);
break;
case 1:
m_mfp->i3_w(0);
break;
case 3:
m_mfp->i5_w(0);
break;
}
}
void tti_state::prg_map(address_map &map)
{
map(0x00000, 0x07fff).rom().region("maincpu", 0);
map(0x7e000, 0x7ffff).ram();
map(0x80000, 0x80017).rw(m_mfp, FUNC(mc68901_device::read), FUNC(mc68901_device::write));
map(0x80020, 0x8002b).m("scsibus:7:asc", FUNC(ncr53c90a_device::map));
map(0x80018, 0x8001f).ram();
map(0x80020, 0x8002b).rw(FUNC(tti_state::asc_r), FUNC(tti_state::asc_w));
map(0x80070, 0x80077).w("bitlatch", FUNC(ls259_device::write_d0));
map(0x80078, 0x8007b).w(FUNC(tti_state::dma_address_w));
map(0x8007c, 0x8007c).r(FUNC(tti_state::io_status_r));
map(0x8007d, 0x8007d).w(FUNC(tti_state::channel_w));
}
static void tti_scsi_devices(device_slot_interface &device)