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diff --git a/src/mame/machine/abc1600mac.h b/src/mame/machine/abc1600mac.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Luxor ABC 1600 Memory Access Controller emulation
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __ABC1600_MAC__
+#define __ABC1600_MAC__
+
+#include "emu.h"
+#include "cpu/m68000/m68000.h"
+
+
+
+///*************************************************************************
+// MACROS / CONSTANTS
+///*************************************************************************
+
+#define ABC1600_MAC_TAG "mac"
+
+
+
+///*************************************************************************
+// INTERFACE CONFIGURATION MACROS
+///*************************************************************************
+
+#define MCFG_ABC1600_MAC_ADD(_cpu_tag, _program_map) \
+ MCFG_DEVICE_ADD(ABC1600_MAC_TAG, ABC1600_MAC, 0) \
+ MCFG_DEVICE_ADDRESS_MAP(AS_PROGRAM, _program_map) \
+ downcast<abc1600_mac_device *>(device)->set_cpu_tag(_cpu_tag);
+
+
+
+///*************************************************************************
+// TYPE DEFINITIONS
+///*************************************************************************
+
+// ======================> abc1600_mac_device
+
+class abc1600_mac_device : public device_t,
+ public device_memory_interface
+{
+public:
+ abc1600_mac_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // optional information overrides
+ virtual const rom_entry *device_rom_region() const;
+
+ void set_cpu_tag(const char *cpu_tag) { m_cpu_tag = cpu_tag; }
+
+ virtual DECLARE_ADDRESS_MAP(map, 8);
+
+ DECLARE_READ8_MEMBER( cause_r );
+ DECLARE_WRITE8_MEMBER( task_w );
+ DECLARE_READ8_MEMBER( segment_r );
+ DECLARE_WRITE8_MEMBER( segment_w );
+ DECLARE_READ8_MEMBER( page_r );
+ DECLARE_WRITE8_MEMBER( page_w );
+ DECLARE_WRITE8_MEMBER( dmamap_w );
+
+ DECLARE_READ8_MEMBER( dma0_mreq_r ) { return dma_mreq_r(DMAMAP_R0_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma0_mreq_w ) { dma_mreq_w(DMAMAP_R0_LO, offset, data); }
+ DECLARE_READ8_MEMBER( dma0_iorq_r ) { return dma_iorq_r(DMAMAP_R0_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma0_iorq_w ) { dma_iorq_w(DMAMAP_R0_LO, offset, data); }
+ DECLARE_READ8_MEMBER( dma1_mreq_r ) { return dma_mreq_r(DMAMAP_R1_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma1_mreq_w ) { dma_mreq_w(DMAMAP_R1_LO, offset, data); }
+ DECLARE_READ8_MEMBER( dma1_iorq_r ) { return dma_iorq_r(DMAMAP_R1_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma1_iorq_w ) { dma_iorq_w(DMAMAP_R1_LO, offset, data); }
+ DECLARE_READ8_MEMBER( dma2_mreq_r ) { return dma_mreq_r(DMAMAP_R2_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma2_mreq_w ) { dma_mreq_w(DMAMAP_R2_LO, offset, data); }
+ DECLARE_READ8_MEMBER( dma2_iorq_r ) { return dma_iorq_r(DMAMAP_R2_LO, offset); }
+ DECLARE_WRITE8_MEMBER( dma2_iorq_w ) { dma_iorq_w(DMAMAP_R2_LO, offset, data); }
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ // device_memory_interface overrides
+ virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_PROGRAM) const;
+
+private:
+ enum
+ {
+ DMAMAP_R2_LO = 0,
+ DMAMAP_R2_HI,
+ DMAMAP_R1_LO = 4,
+ DMAMAP_R1_HI,
+ DMAMAP_R0_LO,
+ DMAMAP_R0_HI
+ };
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+ int get_current_task(offs_t offset);
+ offs_t get_segment_address(offs_t offset);
+ offs_t get_page_address(offs_t offset, UINT8 segd);
+ offs_t translate_address(offs_t offset, int *nonx, int *wp);
+ UINT8 read_user_memory(offs_t offset);
+ void write_user_memory(offs_t offset, UINT8 data);
+ int get_fc();
+ UINT8 read_supervisor_memory(address_space &space, offs_t offset);
+ void write_supervisor_memory(address_space &space, offs_t offset, UINT8 data);
+ offs_t get_dma_address(int index, UINT16 offset);
+ UINT8 dma_mreq_r(int index, UINT16 offset);
+ void dma_mreq_w(int index, UINT16 offset, UINT8 data);
+ UINT8 dma_iorq_r(int index, UINT16 offset);
+ void dma_iorq_w(int index, UINT16 offset, UINT8 data);
+
+ const address_space_config m_space_config;
+
+ required_memory_region m_rom;
+ optional_shared_ptr<UINT8> m_segment_ram;
+ optional_shared_ptr<UINT16> m_page_ram;
+
+ const char *m_cpu_tag;
+ m68000_base_device *m_cpu;
+
+ int m_ifc2;
+ UINT8 m_task;
+ UINT8 m_dmamap[8];
+ UINT8 m_cause;
+};
+
+
+// device type definition
+extern const device_type ABC1600_MAC;
+
+
+
+#endif