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/*****************************************************************************
*
* includes/svi318.h
*
* Spectravideo SVI-318 and SVI-328
*
****************************************************************************/
#ifndef SVI318_H_
#define SVI318_H_
#include "machine/i8255.h"
#include "machine/ins8250.h"
#include "machine/wd17xx.h"
#include "imagedev/cassette.h"
#include "sound/dac.h"
#include "machine/ram.h"
#include "machine/ctronics.h"
struct SVI_318
{
/* general */
UINT8 svi318; /* Are we dealing with an SVI-318 or a SVI-328 model. 0 = 328, 1 = 318 */
/* memory */
UINT8 *empty_bank;
UINT8 bank_switch;
UINT8 bankLow;
UINT8 bankHigh1;
UINT8 *bankLow_ptr;
UINT8 bankLow_read_only;
UINT8 *bankHigh1_ptr;
UINT8 bankHigh1_read_only;
UINT8 *bankHigh2_ptr;
UINT8 bankHigh2_read_only;
/* keyboard */
UINT8 keyboard_row;
/* SVI-806 80 column card */
UINT8 svi806_present;
UINT8 svi806_ram_enabled;
memory_region *svi806_ram;
UINT8 *svi806_gfx;
};
struct SVI318_FDC_STRUCT
{
UINT8 driveselect;
int drq;
int irq;
UINT8 heads[2];
};
class svi318_state : public driver_device
{
public:
svi318_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_pcart(NULL),
m_pcart_rom_size(0),
m_maincpu(*this, "maincpu"),
m_cassette(*this, "cassette"),
m_dac(*this, "dac"),
m_ppi(*this, "ppi8255"),
m_ram(*this, RAM_TAG),
m_centronics(*this, "centronics"),
m_ins8250_0(*this, "ins8250_0"),
m_ins8250_1(*this, "ins8250_1"),
m_line0(*this, "LINE0"),
m_line1(*this, "LINE1"),
m_line2(*this, "LINE2"),
m_line3(*this, "LINE3"),
m_line4(*this, "LINE4"),
m_line5(*this, "LINE5"),
m_line6(*this, "LINE6"),
m_line7(*this, "LINE7"),
m_line8(*this, "LINE8"),
m_line9(*this, "LINE9"),
m_line10(*this, "LINE10"),
m_joysticks(*this, "JOYSTICKS"),
m_buttons(*this, "BUTTONS") { }
SVI_318 m_svi;
UINT8 *m_pcart;
UINT32 m_pcart_rom_size;
SVI318_FDC_STRUCT m_fdc;
DECLARE_WRITE8_MEMBER(svi318_ppi_w);
DECLARE_READ8_MEMBER(svi318_psg_port_a_r);
DECLARE_WRITE8_MEMBER(svi318_psg_port_b_w);
DECLARE_WRITE8_MEMBER(svi318_fdc_drive_motor_w);
DECLARE_WRITE8_MEMBER(svi318_fdc_density_side_w);
DECLARE_READ8_MEMBER(svi318_fdc_irqdrq_r);
DECLARE_WRITE8_MEMBER(svi806_ram_enable_w);
DECLARE_WRITE8_MEMBER(svi318_writemem1);
DECLARE_WRITE8_MEMBER(svi318_writemem2);
DECLARE_WRITE8_MEMBER(svi318_writemem3);
DECLARE_WRITE8_MEMBER(svi318_writemem4);
DECLARE_READ8_MEMBER(svi318_io_ext_r);
DECLARE_WRITE8_MEMBER(svi318_io_ext_w);
DECLARE_DRIVER_INIT(svi318);
DECLARE_MACHINE_START(svi318_pal);
DECLARE_MACHINE_RESET(svi318);
DECLARE_MACHINE_RESET(svi328_806);
DECLARE_VIDEO_START(svi328_806);
DECLARE_MACHINE_START(svi318_ntsc);
DECLARE_WRITE_LINE_MEMBER(vdp_interrupt);
DECLARE_WRITE_LINE_MEMBER(svi318_ins8250_interrupt);
DECLARE_READ8_MEMBER(svi318_ppi_port_a_r);
DECLARE_READ8_MEMBER(svi318_ppi_port_b_r);
DECLARE_WRITE8_MEMBER(svi318_ppi_port_c_w);
DECLARE_WRITE_LINE_MEMBER(svi_fdc_intrq_w);
DECLARE_WRITE_LINE_MEMBER(svi_fdc_drq_w);
DECLARE_DEVICE_IMAGE_LOAD_MEMBER(svi318_cart);
DECLARE_DEVICE_IMAGE_UNLOAD_MEMBER(svi318_cart);
required_device<cpu_device> m_maincpu;
protected:
required_device<cassette_image_device> m_cassette;
required_device<dac_device> m_dac;
required_device<i8255_device> m_ppi;
required_device<ram_device> m_ram;
required_device<centronics_device> m_centronics;
required_device<ins8250_device> m_ins8250_0;
required_device<ins8250_device> m_ins8250_1;
required_ioport m_line0;
required_ioport m_line1;
required_ioport m_line2;
required_ioport m_line3;
required_ioport m_line4;
required_ioport m_line5;
required_ioport m_line6;
required_ioport m_line7;
required_ioport m_line8;
required_ioport m_line9;
required_ioport m_line10;
required_ioport m_joysticks;
required_ioport m_buttons;
void svi318_set_banks();
void svi318_80col_init();
void svi318_vdp_interrupt(int i);
};
/*----------- defined in machine/svi318.c -----------*/
extern const i8255_interface svi318_ppi8255_interface;
extern const ins8250_interface svi318_ins8250_interface[2];
extern const wd17xx_interface svi_wd17xx_interface;
MC6845_UPDATE_ROW( svi806_crtc6845_update_row );
#endif /* SVI318_H_ */
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