// license:BSD-3-Clause
// copyright-holders:Angelo Salese
/***************************************************************************
Mitsubishi Multi 16
****************************************************************************/
#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/pic8259.h"
#include "video/mc6845.h"
#include "screen.h"
class multi16_state : public driver_device
{
public:
multi16_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_pic(*this, "pic8259"),
m_crtc(*this, "crtc"),
m_palette(*this, "palette")
,
m_p_vram(*this, "p_vram"){ }
required_device<cpu_device> m_maincpu;
required_device<pic8259_device> m_pic;
required_device<mc6845_device> m_crtc;
required_device<palette_device> m_palette;
DECLARE_WRITE8_MEMBER(multi16_6845_address_w);
DECLARE_WRITE8_MEMBER(multi16_6845_data_w);
required_shared_ptr<uint16_t> m_p_vram;
uint8_t m_crtc_vreg[0x100],m_crtc_index;
virtual void machine_start() override;
virtual void machine_reset() override;
virtual void video_start() override;
uint32_t screen_update_multi16(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void multi16(machine_config &config);
void multi16_io(address_map &map);
void multi16_map(address_map &map);
};
void multi16_state::video_start()
{
}
#define mc6845_h_char_total (m_crtc_vreg[0])
#define mc6845_h_display (m_crtc_vreg[1])
#define mc6845_h_sync_pos (m_crtc_vreg[2])
#define mc6845_sync_width (m_crtc_vreg[3])
#define mc6845_v_char_total (m_crtc_vreg[4])
#define mc6845_v_total_adj (m_crtc_vreg[5])
#define mc6845_v_display (m_crtc_vreg[6])
#define mc6845_v_sync_pos (m_crtc_vreg[7])
#define mc6845_mode_ctrl (m_crtc_vreg[8])
#define mc6845_tile_height (m_crtc_vreg[9]+1)
#define mc6845_cursor_y_start (m_crtc_vreg[0x0a])
#define mc6845_cursor_y_end (m_crtc_vreg[0x0b])
#define mc6845_start_addr (((m_crtc_vreg[0x0c]<<8) & 0x3f00) | (m_crtc_vreg[0x0d] & 0xff))
#define mc6845_cursor_addr (((m_crtc_vreg[0x0e]<<8) & 0x3f00) | (m_crtc_vreg[0x0f] & 0xff))
#define mc6845_light_pen_addr (((m_crtc_vreg[0x10]<<8) & 0x3f00) | (m_crtc_vreg[0x11] & 0xff))
#define mc6845_update_addr (((m_crtc_vreg[0x12]<<8) & 0x3f00) | (m_crtc_vreg[0x13] & 0xff))
uint32_t multi16_state::screen_update_multi16(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x,y;
int count;
int xi;
count = 0;
for(y=0;y<mc6845_v_display*8;y++)
{
for(x=0;x<(mc6845_h_display*8)/16;x++)
{
for(xi=0;xi<16;xi++)
{
int dot = (bitswap<16>(m_p_vram[count],7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8) >> (15-xi)) & 0x1;
if(screen.visible_area().contains(x*16+xi, y))
bitmap.pix16(y, x*16+xi) = m_palette->pen(dot);
}
count++;
}
}
return 0;
}
void multi16_state::multi16_map(address_map &map)
{
map.unmap_value_high();
map(0x00000, 0x7ffff).ram();
map(0xd8000, 0xdffff).ram().share("p_vram");
map(0xe0000, 0xeffff).ram();
map(0xf0000, 0xf3fff).mirror(0xc000).rom().region("ipl", 0);
}
WRITE8_MEMBER( multi16_state::multi16_6845_address_w )
{
m_crtc_index = data;
m_crtc->address_w(space, offset, data);
}
WRITE8_MEMBER( multi16_state::multi16_6845_data_w )
{
m_crtc_vreg[m_crtc_index] = data;
m_crtc->register_w(space, offset, data);
}
void multi16_state::multi16_io(address_map &map)
{
map.unmap_value_high();
map(0x02, 0x03).rw(m_pic, FUNC(pic8259_device::read), FUNC(pic8259_device::write)); // i8259
map(0x40, 0x40).w(this, FUNC(multi16_state::multi16_6845_address_w));
map(0x41, 0x41).w(this, FUNC(multi16_state::multi16_6845_data_w));
}
/* Input ports */
static INPUT_PORTS_START( multi16 )
INPUT_PORTS_END
void multi16_state::machine_start()
{
}
void multi16_state::machine_reset()
{
}
MACHINE_CONFIG_START(multi16_state::multi16)
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8086, 8000000)
MCFG_CPU_PROGRAM_MAP(multi16_map)
MCFG_CPU_IO_MAP(multi16_io)
MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE("pic8259", pic8259_device, inta_cb)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640, 200)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 200-1)
MCFG_SCREEN_UPDATE_DRIVER(multi16_state, screen_update_multi16)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD("palette", 8)
/* devices */
MCFG_MC6845_ADD("crtc", H46505, "screen", 16000000/5) /* unknown clock, hand tuned to get ~60 fps */
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_DEVICE_ADD("pic8259", PIC8259, 0)
MCFG_PIC8259_OUT_INT_CB(INPUTLINE("maincpu", 0))
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( multi16 )
ROM_REGION( 0x4000, "ipl", ROMREGION_ERASEFF )
ROM_LOAD( "ipl.rom", 0x0000, 0x4000, CRC(5beb5e94) SHA1(d3b9dc9a08995a0f26af9671893417e795370306))
ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS
COMP( 1986, multi16, 0, 0, multi16, multi16, multi16_state, 0, "Mitsubishi", "Multi 16", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)