summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/machine/itt1700_kbd.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/machine/itt1700_kbd.h')
-rw-r--r--src/mame/machine/itt1700_kbd.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/mame/machine/itt1700_kbd.h b/src/mame/machine/itt1700_kbd.h
new file mode 100644
index 00000000000..b8ee3cfd3ee
--- /dev/null
+++ b/src/mame/machine/itt1700_kbd.h
@@ -0,0 +1,47 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+
+#ifndef MAME_MACHINE_ITT1700_KBD
+#define MAME_MACHINE_ITT1700_KBD
+
+#pragma once
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> itt1700_keyboard_device
+
+class itt1700_keyboard_device : public device_t
+{
+public:
+ // device constructor
+ itt1700_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
+
+ // host interface
+ DECLARE_WRITE_LINE_MEMBER(line1_w);
+ DECLARE_WRITE_LINE_MEMBER(line2_w);
+ DECLARE_WRITE_LINE_MEMBER(clock_w);
+ DECLARE_READ_LINE_MEMBER(sense_r);
+
+protected:
+ // device-specific overrides
+ virtual void device_start() override;
+ virtual ioport_constructor device_input_ports() const override;
+
+private:
+ // internal state
+ bool m_clock_state;
+ bool m_line1_state;
+ bool m_line2_state;
+ u8 m_scan_counter;
+
+ // key input matrix
+ required_ioport_array<16> m_keys;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(ITT1700_KEYBOARD, itt1700_keyboard_device)
+
+#endif // MAME_MACHINE_ITT1700_KBD_H