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diff --git a/src/mess/includes/pc1512.h b/src/mess/includes/pc1512.h
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+#pragma once
+
+#ifndef __PC1512__
+#define __PC1512__
+
+
+#include "emu.h"
+#include "cpu/i86/i86.h"
+#include "cpu/mcs48/mcs48.h"
+#include "formats/basicdsk.h"
+#include "formats/pc_dsk.h"
+#include "imagedev/flopdrv.h"
+#include "machine/am9517a.h"
+#include "machine/ctronics.h"
+#include "machine/ins8250.h"
+#include "machine/isa.h"
+#include "machine/isa_wdxt_gen.h"
+#include "machine/mc146818.h"
+#include "machine/pic8259.h"
+#include "machine/pit8253.h"
+#include "machine/pc1512kb.h"
+#include "machine/upd765.h"
+#include "machine/ram.h"
+#include "sound/speaker.h"
+#include "video/mc6845.h"
+
+#define I8086_TAG "ic120"
+#define I8087_TAG "ic119"
+#define I8048_TAG "i8048"
+#define I8237A5_TAG "ic130"
+#define I8259A2_TAG "ic109"
+#define I8253_TAG "ic114"
+#define MC146818_TAG "ic134"
+#define UPD765AC2_TAG "ic112"
+#define INS8250_TAG "ic106"
+#define AMS40041_TAG "ic126"
+#define CENTRONICS_TAG "centronics"
+#define SPEAKER_TAG "speaker"
+#define ISA_BUS_TAG "isa"
+#define SCREEN_TAG "screen"
+
+class pc1512_state : public driver_device
+{
+public:
+ pc1512_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, I8086_TAG),
+ m_dmac(*this, I8237A5_TAG),
+ m_pic(*this, I8259A2_TAG),
+ m_pit(*this, I8253_TAG),
+ m_rtc(*this, MC146818_TAG),
+ m_fdc(*this, UPD765AC2_TAG),
+ m_uart(*this, INS8250_TAG),
+ m_vdu(*this, AMS40041_TAG),
+ m_centronics(*this, CENTRONICS_TAG),
+ m_speaker(*this, SPEAKER_TAG),
+ m_kb(*this, PC1512_KEYBOARD_TAG),
+ m_ram(*this, RAM_TAG),
+ m_floppy0(*this, FLOPPY_0),
+ m_floppy1(*this, FLOPPY_1),
+ m_bus(*this, ISA_BUS_TAG),
+ m_pit1(0),
+ m_pit2(0),
+ m_status1(0),
+ m_status2(0),
+ m_port61(0),
+ m_nmi_enable(0),
+ m_kb_bits(0),
+ m_kbclk(1),
+ m_kbdata(1),
+ m_dreq0(0),
+ m_nden(1),
+ m_dint(0),
+ m_ddrq(0),
+ m_fdc_dsr(0),
+ m_neop(0),
+ m_ack_int_enable(1),
+ m_ack(0),
+ m_speaker_drive(0)
+ { }
+
+ required_device<cpu_device> m_maincpu;
+ required_device<am9517a_device> m_dmac;
+ required_device<device_t> m_pic;
+ required_device<device_t> m_pit;
+ required_device<mc146818_device> m_rtc;
+ required_device<device_t> m_fdc;
+ required_device<ins8250_device> m_uart;
+ required_device<ams40041_device> m_vdu;
+ required_device<centronics_device> m_centronics;
+ required_device<device_t> m_speaker;
+ required_device<pc1512_keyboard_device> m_kb;
+ required_device<ram_device> m_ram;
+ required_device<device_t> m_floppy0;
+ optional_device<device_t> m_floppy1;
+ required_device<isa8_device> m_bus;
+
+ virtual void machine_start();
+ virtual void machine_reset();
+
+ virtual void video_start();
+
+ UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+ void update_speaker();
+ void update_fdc_int();
+ void update_fdc_drq();
+ void update_fdc_tc();
+ void update_ack();
+ void set_fdc_dsr(UINT8 data);
+ int get_display_mode(UINT8 mode);
+ offs_t get_char_rom_offset();
+ int get_color(UINT8 data);
+ void draw_alpha(mc6845_device *device, bitmap_rgb32 &bitmap, const rectangle &cliprect, UINT16 ma, UINT8 ra, UINT16 y, UINT8 x_count, INT8 cursor_x, void *param);
+ void draw_graphics_1(mc6845_device *device, bitmap_rgb32 &bitmap, const rectangle &cliprect, UINT16 ma, UINT8 ra, UINT16 y, UINT8 x_count, INT8 cursor_x, void *param);
+ void draw_graphics_2(mc6845_device *device, bitmap_rgb32 &bitmap, const rectangle &cliprect, UINT16 ma, UINT8 ra, UINT16 y, UINT8 x_count, INT8 cursor_x, void *param);
+
+ DECLARE_READ8_MEMBER( video_ram_r );
+ DECLARE_WRITE8_MEMBER( video_ram_w );
+ DECLARE_READ8_MEMBER( system_r );
+ DECLARE_WRITE8_MEMBER( system_w );
+ DECLARE_READ8_MEMBER( mouse_r );
+ DECLARE_WRITE8_MEMBER( mouse_w );
+ DECLARE_WRITE8_MEMBER( dma_page_w );
+ DECLARE_WRITE8_MEMBER( nmi_mask_w );
+ DECLARE_READ8_MEMBER( printer_r );
+ DECLARE_WRITE8_MEMBER( printer_w );
+ DECLARE_READ8_MEMBER( fdc_r );
+ DECLARE_WRITE8_MEMBER( fdc_w );
+ DECLARE_READ8_MEMBER( vdu_r );
+ DECLARE_WRITE8_MEMBER( vdu_w );
+ DECLARE_WRITE_LINE_MEMBER( kbdata_w );
+ DECLARE_WRITE_LINE_MEMBER( kbclk_w );
+ DECLARE_WRITE_LINE_MEMBER( pit1_w );
+ DECLARE_WRITE_LINE_MEMBER( pit2_w );
+ DECLARE_WRITE_LINE_MEMBER( ack_w );
+ DECLARE_WRITE_LINE_MEMBER( fdc_int_w );
+ DECLARE_WRITE_LINE_MEMBER( fdc_drq_w );
+ DECLARE_WRITE_LINE_MEMBER( hrq_w );
+ DECLARE_WRITE_LINE_MEMBER( eop_w );
+ DECLARE_READ8_MEMBER( memr_r );
+ DECLARE_WRITE8_MEMBER( memw_w );
+ DECLARE_READ8_MEMBER( ior1_r );
+ DECLARE_READ8_MEMBER( ior2_r );
+ DECLARE_READ8_MEMBER( ior3_r );
+ DECLARE_WRITE8_MEMBER( iow0_w );
+ DECLARE_WRITE8_MEMBER( iow1_w );
+ DECLARE_WRITE8_MEMBER( iow2_w );
+ DECLARE_WRITE8_MEMBER( iow3_w );
+ DECLARE_WRITE_LINE_MEMBER( dack0_w );
+ DECLARE_WRITE_LINE_MEMBER( dack1_w );
+ DECLARE_WRITE_LINE_MEMBER( dack2_w );
+ DECLARE_WRITE_LINE_MEMBER( dack3_w );
+ DECLARE_INPUT_CHANGED_MEMBER( mouse_button_1_changed );
+ DECLARE_INPUT_CHANGED_MEMBER( mouse_button_2_changed );
+ DECLARE_INPUT_CHANGED_MEMBER( mouse_x_changed );
+ DECLARE_INPUT_CHANGED_MEMBER( mouse_y_changed );
+
+ // system status register
+ int m_pit1;
+ int m_pit2;
+ UINT8 m_status1;
+ UINT8 m_status2;
+ UINT8 m_port61;
+
+ // interrupt state
+ int m_nmi_enable;
+
+ // keyboard state
+ UINT8 m_kbd;
+ int m_kb_bits;
+ int m_kbclk;
+ int m_kbdata;
+
+ // mouse state
+ UINT8 m_mouse_x;
+ UINT8 m_mouse_y;
+
+ // DMA state
+ UINT8 m_dma_page[4];
+ int m_dma_channel;
+ int m_dreq0;
+
+ // floppy state
+ int m_nden;
+ int m_dint;
+ int m_ddrq;
+ UINT8 m_fdc_dsr;
+ int m_neop;
+
+ // printer state
+ int m_ack_int_enable;
+ int m_ack;
+ UINT8 m_printer_data;
+ UINT8 m_printer_control;
+
+ // video state
+ UINT8 *m_video_ram;
+ UINT8 *m_char_rom;
+ int m_toggle;
+ int m_lpen;
+ int m_blink;
+ int m_cursor;
+ int m_blink_ctr;
+ UINT8 m_vdu_mode;
+ UINT8 m_vdu_color;
+ UINT8 m_vdu_plane;
+ UINT8 m_vdu_rdsel;
+ UINT8 m_vdu_border;
+
+ // sound state
+ int m_speaker_drive;
+};
+
+class pc1640_state : public pc1512_state
+{
+public:
+ pc1640_state(const machine_config &mconfig, device_type type, const char *tag)
+ : pc1512_state(mconfig, type, tag),
+ m_opt(0)
+ { }
+
+ virtual void machine_start();
+ virtual void machine_reset();
+
+ virtual void video_start();
+
+ UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+ DECLARE_READ8_MEMBER( video_ram_r );
+ DECLARE_WRITE8_MEMBER( video_ram_w );
+ DECLARE_READ8_MEMBER( io_r );
+ DECLARE_READ8_MEMBER( iga_r );
+ DECLARE_WRITE8_MEMBER( iga_w );
+ DECLARE_READ8_MEMBER( printer_r );
+
+ // video state
+ int m_opt;
+ UINT8 m_egc_ctrl;
+ UINT8 m_emcr; // extended mode control register
+ UINT8 m_emcrp; // extended mode control register protection read counter
+ UINT8 m_sar; // sequencer address register
+ UINT8 m_sdr[8]; // sequencer data registers
+ UINT8 m_gcar; // graphics controller address register
+ UINT8 m_gcdr[16]; // graphics controller data registers
+ UINT8 m_crtcar; // CRT controller address register
+ UINT8 m_crtcdr[32]; // CRT controller data registers
+ UINT8 m_plr; // Plantronics mode register
+};
+
+// ---------- defined in video/pc1512.c ----------
+
+MACHINE_CONFIG_EXTERN( pc1512_video );
+
+// ---------- defined in video/pc1640.c ----------
+
+MACHINE_CONFIG_EXTERN( pc1640_video );
+
+#endif