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diff --git a/src/devices/machine/adc0844.h b/src/devices/machine/adc0844.h
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+// license: BSD-3-Clause
+// copyright-holders: Dirk Best
+/***************************************************************************
+
+ ADC0844
+
+ A/D Converter With Multiplexer Options
+
+ ___ ___
+ /RD 1 |* u | 20 VCC
+ /CS 2 | | 19 /WR
+ CH1 3 | | 18 /INTR
+ CH2 4 | | 17 DB0/MA0
+ CH3 5 | | 16 DB1/MA1
+ CH4 6 | | 15 DB2/MA2
+ AGND 7 | | 14 DB3/MA3
+ VREF 8 | | 13 DB4
+ DB7 9 | | 12 DB5
+ DGND 10 |_______| 11 DB6
+
+***************************************************************************/
+
+#ifndef MAME_DEVICES_MACHINE_ADC0844_H
+#define MAME_DEVICES_MACHINE_ADC0844_H
+
+#pragma once
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_ADC0844_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, ADC0844, 0)
+
+#define MCFG_ADC0844_INTR_CB(_devcb) \
+ devcb = &adc0844_device::set_intr_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0844_CH1_CB(_devcb) \
+ devcb = &adc0844_device::set_ch1_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0844_CH2_CB(_devcb) \
+ devcb = &adc0844_device::set_ch2_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0844_CH3_CB(_devcb) \
+ devcb = &adc0844_device::set_ch3_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0844_CH4_CB(_devcb) \
+ devcb = &adc0844_device::set_ch4_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0848_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, ADC0848, 0)
+
+#define MCFG_ADC0848_INTR_CB MCFG_ADC0844_INTR_CB
+#define MCFG_ADC0848_CH1_CB MCFG_ADC0844_CH1_CB
+#define MCFG_ADC0848_CH2_CB MCFG_ADC0844_CH2_CB
+#define MCFG_ADC0848_CH3_CB MCFG_ADC0844_CH3_CB
+#define MCFG_ADC0848_CH4_CB MCFG_ADC0844_CH4_CB
+
+#define MCFG_ADC0848_CH5_CB(_devcb) \
+ devcb = &adc0848_device::set_ch5_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0848_CH6_CB(_devcb) \
+ devcb = &adc0848_device::set_ch6_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0848_CH7_CB(_devcb) \
+ devcb = &adc0848_device::set_ch7_callback(*device, DEVCB_##_devcb);
+
+#define MCFG_ADC0848_CH8_CB(_devcb) \
+ devcb = &adc0848_device::set_ch8_callback(*device, DEVCB_##_devcb);
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class adc0844_device : public device_t
+{
+public:
+ // construction/destruction
+ adc0844_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ // configuration
+ template <class Object> static devcb_base &set_intr_callback(device_t &device, Object &&cb)
+ { return downcast<adc0844_device &>(device).m_intr_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch1_callback(device_t &device, Object &&cb)
+ { return downcast<adc0844_device &>(device).m_ch1_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch2_callback(device_t &device, Object &&cb)
+ { return downcast<adc0844_device &>(device).m_ch2_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch3_callback(device_t &device, Object &&cb)
+ { return downcast<adc0844_device &>(device).m_ch3_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch4_callback(device_t &device, Object &&cb)
+ { return downcast<adc0844_device &>(device).m_ch4_cb.set_callback(std::forward<Object>(cb)); }
+
+ DECLARE_READ8_MEMBER(read);
+ virtual DECLARE_WRITE8_MEMBER(write);
+
+protected:
+ adc0844_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+ uint8_t clamp(int value);
+
+ // callbacks
+ devcb_write_line m_intr_cb;
+ devcb_read8 m_ch1_cb, m_ch2_cb, m_ch3_cb, m_ch4_cb;
+
+ emu_timer *m_conversion_timer;
+
+ // state
+ int m_channel;
+ uint8_t m_result;
+};
+
+class adc0848_device : public adc0844_device
+{
+public:
+ // construction/destruction
+ adc0848_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ // configuration
+ template <class Object> static devcb_base &set_ch5_callback(device_t &device, Object &&cb)
+ { return downcast<adc0848_device &>(device).m_ch5_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch6_callback(device_t &device, Object &&cb)
+ { return downcast<adc0848_device &>(device).m_ch6_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch7_callback(device_t &device, Object &&cb)
+ { return downcast<adc0848_device &>(device).m_ch7_cb.set_callback(std::forward<Object>(cb)); }
+
+ template <class Object> static devcb_base &set_ch8_callback(device_t &device, Object &&cb)
+ { return downcast<adc0848_device &>(device).m_ch8_cb.set_callback(std::forward<Object>(cb)); }
+
+ virtual DECLARE_WRITE8_MEMBER(write) override;
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+private:
+ devcb_read8 m_ch5_cb, m_ch6_cb, m_ch7_cb, m_ch8_cb;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(ADC0844, adc0844_device)
+DECLARE_DEVICE_TYPE(ADC0848, adc0848_device)
+
+#endif // MAME_DEVICES_MACHINE_ADC0844_H