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Diffstat (limited to 'src/devices/cpu/z80/kl5c80a16.cpp')
-rw-r--r--src/devices/cpu/z80/kl5c80a16.cpp99
1 files changed, 98 insertions, 1 deletions
diff --git a/src/devices/cpu/z80/kl5c80a16.cpp b/src/devices/cpu/z80/kl5c80a16.cpp
index 8fa31925366..d92cc9142de 100644
--- a/src/devices/cpu/z80/kl5c80a16.cpp
+++ b/src/devices/cpu/z80/kl5c80a16.cpp
@@ -11,7 +11,7 @@
— Synchronous serial port (KP62) (unemulated)
— 16-bit timer/counters (KP63A)
— 16-level interrupt controller (KP69)
- — Parallel ports (KP67) (unemulated)
+ — Parallel ports (KP67)
— External bus/DRAM interface unit (unemulated)
***************************************************************************/
@@ -35,6 +35,11 @@ kl5c80a16_device::kl5c80a16_device(const machine_config &mconfig, const char *ta
address_map_constructor(),
address_map_constructor(FUNC(kl5c80a16_device::internal_io), this))
, m_kp69(*this, "kp69")
+ , m_port_in_callback(*this)
+ , m_port_out_callback(*this)
+ , m_port_data{0, 0, 0, 0}
+ , m_port_direction{0x0f, 0, 0, 0}
+ , m_port_3state{0, 0, 0, 0}
{
}
@@ -51,6 +56,22 @@ void kl5c80a16_device::internal_io(address_map &map)
map(0x35, 0x35).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::isrh_r), FUNC(kp69_device::lerh_pgrh_w));
map(0x36, 0x36).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::imrl_r), FUNC(kp69_device::imrl_w));
map(0x37, 0x37).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::imrh_r), FUNC(kp69_device::ivr_imrh_w));
+ map(0x38, 0x3f).mirror(0xff00).rw(FUNC(kl5c80a16_device::port_r), FUNC(kl5c80a16_device::port_w));
+}
+
+
+//-------------------------------------------------
+// device_resolve_objects - resolve objects that
+// may be needed for other devices to set
+// initial conditions at start time
+//-------------------------------------------------
+
+void kl5c80a16_device::device_resolve_objects()
+{
+ // Resolve parallel port callbacks
+ for (int i = 0; i < 4; i++)
+ m_port_in_callback[i].resolve_safe(m_port_3state[i]);
+ m_port_out_callback.resolve_all_safe();
}
@@ -63,6 +84,10 @@ void kl5c80a16_device::device_start()
kc82_device::device_start();
m_kp69->add_to_state(*this, KP69_IRR);
+
+ // Register save state
+ save_item(NAME(m_port_data));
+ save_item(NAME(m_port_direction));
}
@@ -73,6 +98,14 @@ void kl5c80a16_device::device_start()
void kl5c80a16_device::device_reset()
{
kc82_device::device_reset();
+
+ // Reset parallel port registers (Port 0 direction is fixed to upper 4 bits input & lower 4 bits output)
+ std::fill(std::begin(m_port_data), std::end(m_port_data), 0x00);
+ std::fill(std::begin(m_port_direction) + 1, std::end(m_port_direction), 0x00);
+
+ // Reset parallel port outputs
+ for (int i = 1; i < 4; i++)
+ m_port_out_callback[i](0, m_port_3state[i] & ~m_port_direction[i], m_port_direction[i]);
}
@@ -104,3 +137,67 @@ void kl5c80a16_device::device_config_complete()
{
set_daisy_config(pseudo_daisy_config);
}
+
+
+//**************************************************************************
+// KP67 PARALLEL PORT
+//**************************************************************************
+
+//-------------------------------------------------
+// port_r - read from parallel port data or
+// direction register
+//-------------------------------------------------
+
+u8 kl5c80a16_device::port_r(offs_t offset)
+{
+ if (BIT(offset, 0))
+ return m_port_direction[offset >> 1];
+ else
+ {
+ u8 data = m_port_data[offset >> 1];
+ const u8 dir = m_port_direction[offset >> 1];
+ if (dir != 0xff)
+ data = (data & dir) | (m_port_in_callback[offset >> 1](0, u8(~dir)) & ~dir);
+ return data;
+ }
+}
+
+
+//-------------------------------------------------
+// port_w - write to parallel port data or
+// direction register or bit control
+//-------------------------------------------------
+
+void kl5c80a16_device::port_w(offs_t offset, u8 data)
+{
+ unsigned p = offset >> 1;
+ u8 dir = m_port_direction[p];
+ if (offset == 1)
+ {
+ // Bit set/reset command
+ const unsigned b = BIT(data, 1, 3);
+ p = BIT(data, 4, 2);
+ if (BIT(m_port_data[p], b) == BIT(data, 0))
+ return;
+ data = (m_port_data[p] ^= 1 << b);
+ dir = m_port_direction[p];
+ if (!BIT(dir, b))
+ return;
+ }
+ else if (BIT(offset, 0))
+ {
+ if (dir == data)
+ return;
+ m_port_direction[p] = dir = data;
+ data = m_port_data[p];
+ }
+ else
+ {
+ u8 old_data = std::exchange(m_port_data[p], data);
+ if (((old_data ^ data) & dir) == 0)
+ return;
+ }
+
+ // Update port output
+ m_port_out_callback[offset >> 1](0, (data & dir) | (m_port_3state[offset >> 1] & ~dir), dir);
+}