summaryrefslogtreecommitdiffstatshomepage
diff options
context:
space:
mode:
author AJR <ajrhacker@users.noreply.github.com>2019-09-30 08:13:30 -0400
committer AJR <ajrhacker@users.noreply.github.com>2019-09-30 08:13:30 -0400
commit856260b096646d70de73eafbfac65e469bdfc27d (patch)
tree461beb601b6e670a9e278b562ba51c20502deeb4
parentbca6bf52c0f64e1d7bfb4f369d9ac46ed0c427c1 (diff)
a1010: Add LED outputs (nw)
-rw-r--r--src/mame/drivers/textelcomp.cpp47
1 files changed, 46 insertions, 1 deletions
diff --git a/src/mame/drivers/textelcomp.cpp b/src/mame/drivers/textelcomp.cpp
index 1236e2e6651..6ed3f14261d 100644
--- a/src/mame/drivers/textelcomp.cpp
+++ b/src/mame/drivers/textelcomp.cpp
@@ -26,7 +26,11 @@ public:
, m_rtc(*this, "rtc")
, m_chargen(*this, "chargen")
, m_keys(*this, "KEY%X", 0U)
+ , m_leds(*this, "led%u", 0U)
, m_keyscan(0)
+ , m_shift_register(0)
+ , m_shift_data(true)
+ , m_shift_clock(true)
{ }
void textelcomp(machine_config &config);
@@ -35,6 +39,9 @@ private:
virtual void machine_start() override;
void keyscan_w(u8 data);
u8 keyboard_r();
+ DECLARE_WRITE_LINE_MEMBER(shift_data_w);
+ DECLARE_WRITE_LINE_MEMBER(shift_clock_w);
+ void update_shift_output();
void rtc_w(u8 data);
void mem_map(address_map &map);
@@ -44,8 +51,12 @@ private:
required_device<msm58321_device> m_rtc;
required_region_ptr<u8> m_chargen;
required_ioport_array<16> m_keys;
+ output_finder<16> m_leds;
u8 m_keyscan;
+ u16 m_shift_register;
+ bool m_shift_data;
+ bool m_shift_clock;
};
@@ -54,11 +65,20 @@ void textelcomp_state::machine_start()
m_rtc->cs1_w(1);
subdevice<mos6551_device>("acia")->write_cts(0);
+ m_leds.resolve();
+
save_item(NAME(m_keyscan));
+ save_item(NAME(m_shift_register));
+ save_item(NAME(m_shift_data));
+ save_item(NAME(m_shift_clock));
}
void textelcomp_state::keyscan_w(u8 data)
{
+ // 2x TC4094BP driving keyboard lights
+ if (BIT(data, 4) && !BIT(m_keyscan, 4))
+ update_shift_output();
+
m_keyscan = data;
}
@@ -67,6 +87,30 @@ u8 textelcomp_state::keyboard_r()
return m_keys[m_keyscan & 0x0f]->read();
}
+WRITE_LINE_MEMBER(textelcomp_state::shift_data_w)
+{
+ m_shift_data = state;
+}
+
+WRITE_LINE_MEMBER(textelcomp_state::shift_clock_w)
+{
+ if (state && !m_shift_clock)
+ {
+ m_shift_clock = true;
+ m_shift_register = (m_shift_register << 1) | m_shift_data;
+ if (BIT(m_keyscan, 4))
+ update_shift_output();
+ }
+ else if (!state && m_shift_clock)
+ m_shift_clock = false;
+}
+
+void textelcomp_state::update_shift_output()
+{
+ for (int i = 0; i < 16; i++)
+ m_leds[i] = BIT(m_shift_register, i);
+}
+
void textelcomp_state::rtc_w(u8 data)
{
// Minimum address/data setup time is given as 0 µs in Oki and Epson datasheets
@@ -293,7 +337,8 @@ void textelcomp_state::textelcomp(machine_config &config)
via6522_device &via2(VIA6522(config, "via2", 3.6864_MHz_XTAL / 2)); // GS65SC22P-2
via2.readpa_handler().set(FUNC(textelcomp_state::keyboard_r));
via2.writepb_handler().set(FUNC(textelcomp_state::keyscan_w));
- // TODO: CB1, CB2 and PB4 control 2x TC4094BP driving keyboard lights
+ via2.cb1_handler().set(FUNC(textelcomp_state::shift_clock_w));
+ via2.cb2_handler().set(FUNC(textelcomp_state::shift_data_w));
via6522_device &via3(VIA6522(config, "via3", 3.6864_MHz_XTAL / 2)); // GS65SC22P-2
via3.writepa_handler().set(FUNC(textelcomp_state::rtc_w));