diff options
Diffstat (limited to 'src/mame/drivers/multi16.c')
-rw-r--r-- | src/mame/drivers/multi16.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/mame/drivers/multi16.c b/src/mame/drivers/multi16.c new file mode 100644 index 00000000000..3e9722b990e --- /dev/null +++ b/src/mame/drivers/multi16.c @@ -0,0 +1,167 @@ +// license:BSD-3-Clause +// copyright-holders:Angelo Salese +/*************************************************************************** + + Mitsubishi Multi 16 + +****************************************************************************/ + +#include "emu.h" +#include "cpu/i86/i86.h" +#include "video/mc6845.h" +#include "machine/pic8259.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> m_p_vram; + UINT8 m_crtc_vreg[0x100],m_crtc_index; + virtual void machine_start(); + virtual void machine_reset(); + virtual void video_start(); + UINT32 screen_update_multi16(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); +}; + + +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 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 = (BITSWAP16(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; +} + +static ADDRESS_MAP_START(multi16_map, AS_PROGRAM, 16, multi16_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x00000,0x7ffff) AM_RAM + AM_RANGE(0xd8000,0xdffff) AM_RAM AM_SHARE("p_vram") + AM_RANGE(0xe0000,0xeffff) AM_RAM + AM_RANGE(0xf0000,0xf3fff) AM_MIRROR(0xc000) AM_ROM AM_REGION("ipl", 0) +ADDRESS_MAP_END + +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); +} + +static ADDRESS_MAP_START(multi16_io, AS_IO, 16, multi16_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x02, 0x03) AM_DEVREADWRITE8("pic8259", pic8259_device, read, write, 0xffff) // i8259 + AM_RANGE(0x40, 0x41) AM_WRITE8(multi16_6845_address_w, 0x00ff) + AM_RANGE(0x40, 0x41) AM_WRITE8(multi16_6845_data_w, 0xff00) +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( multi16 ) +INPUT_PORTS_END + +void multi16_state::machine_start() +{ +} + + +void multi16_state::machine_reset() +{ +} + + +static MACHINE_CONFIG_START( multi16, multi16_state ) + /* 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_PIC8259_ADD( "pic8259", INPUTLINE("maincpu", 0), GND, NULL ) +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 INIT COMPANY FULLNAME FLAGS */ +COMP( 1986, multi16, 0, 0, multi16, multi16, driver_device, 0, "Mitsubishi", "Multi 16", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) |