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-rw-r--r--src/devices/machine/msm6200.h46
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diff --git a/src/devices/machine/msm6200.h b/src/devices/machine/msm6200.h
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+// license:BSD-3-Clause
+// copyright-holders: Devin Acker
+/***************************************************************************
+ OKI MSM6200 keyboard controller (HLE)
+***************************************************************************/
+
+#ifndef MAME_MACHINE_MSM6200_H
+#define MAME_MACHINE_MSM6200_H
+
+#pragma once
+
+class msm6200_device : public device_t
+{
+public:
+ msm6200_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+
+ auto irq_cb() { return m_irq_cb.bind(); }
+
+ void write(offs_t offset, u8 data);
+ u8 read();
+
+protected:
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+private:
+ static constexpr unsigned TIMER_RATE = 256; // arbitrary
+
+ TIMER_CALLBACK_MEMBER(scan_timer);
+
+ optional_ioport_array<38> m_keys;
+ optional_ioport m_velocity;
+
+ devcb_write_line m_irq_cb;
+
+ emu_timer *m_timer;
+
+ u8 m_cmd, m_row, m_key_data;
+ u8 m_key_state;
+ u8 m_last_state[38];
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(MSM6200, msm6200_device)
+
+#endif // MAME_MACHINE_MSM6200_H