/*************************************************************************** NEC PC-100 TODO: - there's a regression with i8259, check this code: F8209: B8 FB 00 mov ax,0FBh F820C: E6 02 out 2h,al F820E: B9 00 00 mov cx,0h F8211: FB sti F8212: 0A E4 or ah,ah <- it's supposed to trigger an irq there! F8214: E1 FC loopz 0F8212h F8216: FA cli F8217: 0A E9 or ch,cl F8219: 74 15 je 0F8230h ****************************************************************************/ #include "emu.h" #include "cpu/i86/i86.h" #include "machine/i8255.h" #include "machine/pic8259.h" class pc100_state : public driver_device { public: pc100_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_palram(*this, "palram"){ } DECLARE_READ16_MEMBER(pc100_vram_r); DECLARE_WRITE16_MEMBER(pc100_vram_w); DECLARE_READ16_MEMBER(pc100_kanji_r); DECLARE_WRITE16_MEMBER(pc100_kanji_w); DECLARE_READ8_MEMBER(pc100_key_r); DECLARE_WRITE8_MEMBER(pc100_output_w); DECLARE_WRITE16_MEMBER(pc100_paletteram_w); DECLARE_READ8_MEMBER(pc100_shift_r); DECLARE_WRITE8_MEMBER(pc100_shift_w); DECLARE_READ8_MEMBER(pc100_vs_vreg_r); DECLARE_WRITE8_MEMBER(pc100_vs_vreg_w); DECLARE_WRITE8_MEMBER(pc100_crtc_addr_w); DECLARE_WRITE8_MEMBER(pc100_crtc_data_w); DECLARE_WRITE8_MEMBER(lower_mask_w); DECLARE_WRITE8_MEMBER(upper_mask_w); DECLARE_WRITE8_MEMBER(crtc_bank_w); DECLARE_WRITE_LINE_MEMBER(pc100_set_int_line); UINT16 *m_kanji_rom; UINT16 *m_vram; required_shared_ptr m_palram; UINT16 m_kanji_addr; UINT8 m_timer_mode; UINT8 m_bank_r,m_bank_w; struct{ UINT8 shift; UINT16 mask; UINT16 vstart; UINT8 addr; UINT8 reg[8]; }m_crtc; }; static VIDEO_START( pc100 ) { } static SCREEN_UPDATE_IND16( pc100 ) { pc100_state *state = screen.machine().driver_data(); int x,y; int count; int xi; int dot; int pen[4],pen_i; count = ((state->m_crtc.vstart + 0x20) * 0x40); for(y=0;y<512;y++) { count &= 0xffff; for(x=0;x<1024/16;x++) { for(xi=0;xi<16;xi++) { for(pen_i=0;pen_i<4;pen_i++) pen[pen_i] = (state->m_vram[count+pen_i*0x10000] >> xi) & 1; dot = 0; for(pen_i=0;pen_i<4;pen_i++) dot |= pen[pen_i]<> i) & 1) { old_vram = m_vram[offset+i*0x10000]; COMBINE_DATA(&m_vram[offset+i*0x10000]); m_vram[offset+i*0x10000] = ((m_vram[offset+i*0x10000]|(m_vram[offset+i*0x10000]<<16)) >> m_crtc.shift); if(ACCESSING_BITS_0_15) m_vram[offset+i*0x10000] = (m_vram[offset+i*0x10000] & ~m_crtc.mask) | (old_vram & m_crtc.mask); else if(ACCESSING_BITS_8_15) m_vram[offset+i*0x10000] = (m_vram[offset+i*0x10000] & ((~m_crtc.mask) & 0xff00)) | (old_vram & (m_crtc.mask|0xff)); else if(ACCESSING_BITS_0_7) m_vram[offset+i*0x10000] = (m_vram[offset+i*0x10000] & ((~m_crtc.mask) & 0xff)) | (old_vram & (m_crtc.mask|0xff00)); } } } static ADDRESS_MAP_START(pc100_map, AS_PROGRAM, 16, pc100_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x00000,0xbffff) AM_RAM // work ram AM_RANGE(0xc0000,0xdffff) AM_READWRITE(pc100_vram_r,pc100_vram_w) // vram, blitter based! AM_RANGE(0xf8000,0xfffff) AM_ROM AM_REGION("ipl", 0) ADDRESS_MAP_END READ16_MEMBER( pc100_state::pc100_kanji_r ) { return m_kanji_rom[m_kanji_addr]; } WRITE16_MEMBER( pc100_state::pc100_kanji_w ) { COMBINE_DATA(&m_kanji_addr); } READ8_MEMBER( pc100_state::pc100_key_r ) { if(offset) return ioport("DSW")->read(); // bit 5: horizontal/vertical monitor dsw return 0; } WRITE8_MEMBER( pc100_state::pc100_output_w ) { if(offset == 0) m_timer_mode = (data & 0x18) >> 3; } WRITE16_MEMBER( pc100_state::pc100_paletteram_w ) { COMBINE_DATA(&m_palram[offset]); { int r,g,b; r = (m_palram[offset] >> 0) & 7; g = (m_palram[offset] >> 3) & 7; b = (m_palram[offset] >> 6) & 7; palette_set_color_rgb(machine(), offset, pal3bit(r),pal3bit(g),pal3bit(b)); } } READ8_MEMBER( pc100_state::pc100_shift_r ) { return m_crtc.shift; } WRITE8_MEMBER( pc100_state::pc100_shift_w ) { m_crtc.shift = data & 0xf; } READ8_MEMBER( pc100_state::pc100_vs_vreg_r ) { if(offset) return m_crtc.vstart >> 8; return m_crtc.vstart & 0xff; } WRITE8_MEMBER( pc100_state::pc100_vs_vreg_w ) { if(offset) m_crtc.vstart = (m_crtc.vstart & 0xff) | (data << 8); else m_crtc.vstart = (m_crtc.vstart & 0xff00) | (data & 0xff); } WRITE8_MEMBER( pc100_state::pc100_crtc_addr_w ) { m_crtc.addr = data & 7; } WRITE8_MEMBER( pc100_state::pc100_crtc_data_w ) { m_crtc.reg[m_crtc.addr] = data; } /* everything is 8-bit bus wide */ static ADDRESS_MAP_START(pc100_io, AS_IO, 16, pc100_state) ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x03) AM_DEVREADWRITE8_LEGACY("pic8259", pic8259_r, pic8259_w, 0x00ff) // i8259 // AM_RANGE(0x04, 0x07) i8237? // AM_RANGE(0x08, 0x0b) upd765 // AM_RANGE(0x10, 0x17) i8255 #1 AM_RANGE(0x18, 0x1f) AM_DEVREADWRITE8("ppi8255_2", i8255_device, read, write,0x00ff) // i8255 #2 AM_RANGE(0x20, 0x23) AM_READ8(pc100_key_r,0x00ff) //i/o, keyboard, mouse AM_RANGE(0x22, 0x25) AM_WRITE8(pc100_output_w,0x00ff) //i/o, keyboard, mouse // AM_RANGE(0x28, 0x2b) i8251 AM_RANGE(0x30, 0x31) AM_READWRITE8(pc100_shift_r,pc100_shift_w,0x00ff) // crtc shift AM_RANGE(0x38, 0x39) AM_WRITE8(pc100_crtc_addr_w,0x00ff) //crtc address reg AM_RANGE(0x3a, 0x3b) AM_WRITE8(pc100_crtc_data_w,0x00ff) //crtc data reg AM_RANGE(0x3c, 0x3f) AM_READWRITE8(pc100_vs_vreg_r,pc100_vs_vreg_w,0x00ff) //crtc vertical start position AM_RANGE(0x40, 0x5f) AM_RAM_WRITE(pc100_paletteram_w) AM_SHARE("palram") // AM_RANGE(0x60, 0x61) crtc command (16-bit wide) AM_RANGE(0x80, 0x81) AM_READWRITE(pc100_kanji_r,pc100_kanji_w) AM_RANGE(0x82, 0x83) AM_WRITENOP //kanji-related? AM_RANGE(0x84, 0x87) AM_WRITENOP //kanji "strobe" signal 0/1 ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( pc100 ) PORT_START("DSW") PORT_DIPNAME( 0x01, 0x01, "DSW" ) PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x20, "Monitor" ) PORT_DIPSETTING( 0x20, "Horizontal" ) PORT_DIPSETTING( 0x00, "Vertical" ) PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) INPUT_PORTS_END static const gfx_layout kanji_layout = { 16, 16, RGN_FRAC(1,1), 1, { 0 }, { 7,6,5,4,3,2,1,0,15,14,13,12,11,10,9,8 }, { STEP16(0,16) }, 16*16 }; static GFXDECODE_START( pc100 ) GFXDECODE_ENTRY( "kanji", 0x0000, kanji_layout, 8, 1 ) GFXDECODE_END WRITE8_MEMBER( pc100_state::lower_mask_w ) { m_crtc.mask = (m_crtc.mask & 0xff00) | data; } WRITE8_MEMBER( pc100_state::upper_mask_w ) { m_crtc.mask = (m_crtc.mask & 0xff) | (data << 8); } WRITE8_MEMBER( pc100_state::crtc_bank_w ) { m_bank_w = data & 0xf; m_bank_r = (data & 0x30) >> 4; } static I8255A_INTERFACE( pc100_ppi8255_interface_2 ) { DEVCB_NULL, DEVCB_DRIVER_MEMBER(pc100_state, lower_mask_w), DEVCB_NULL, DEVCB_DRIVER_MEMBER(pc100_state, upper_mask_w), DEVCB_NULL, DEVCB_DRIVER_MEMBER(pc100_state, crtc_bank_w) }; static IRQ_CALLBACK(pc100_irq_callback) { return pic8259_acknowledge( device->machine().device( "pic8259" ) ); } WRITE_LINE_MEMBER( pc100_state::pc100_set_int_line ) { //printf("%02x\n",interrupt); cputag_set_input_line(machine(), "maincpu", 0, state ? HOLD_LINE : CLEAR_LINE); } static const struct pic8259_interface pc100_pic8259_config = { DEVCB_DRIVER_LINE_MEMBER(pc100_state, pc100_set_int_line), DEVCB_LINE_GND, DEVCB_NULL }; static MACHINE_START(pc100) { pc100_state *state = machine.driver_data(); device_set_irq_callback(machine.device("maincpu"), pc100_irq_callback); state->m_kanji_rom = (UINT16 *)(*machine.root_device().memregion("kanji")); state->m_vram = (UINT16 *)(*state->memregion("vram")); } static MACHINE_RESET(pc100) { } static INTERRUPT_GEN(pc100_vblank_irq) { pic8259_ir4_w(device->machine().device("pic8259"), 1); } static TIMER_DEVICE_CALLBACK( pc100_600hz_irq ) { pc100_state *state = timer.machine().driver_data(); if(state->m_timer_mode == 0) pic8259_ir2_w(timer.machine().device("pic8259"), 1); } static TIMER_DEVICE_CALLBACK( pc100_100hz_irq ) { pc100_state *state = timer.machine().driver_data(); if(state->m_timer_mode == 1) pic8259_ir2_w(timer.machine().device("pic8259"), 1); } static TIMER_DEVICE_CALLBACK( pc100_50hz_irq ) { pc100_state *state = timer.machine().driver_data(); if(state->m_timer_mode == 2) pic8259_ir2_w(timer.machine().device("pic8259"), 1); } static TIMER_DEVICE_CALLBACK( pc100_10hz_irq ) { pc100_state *state = timer.machine().driver_data(); if(state->m_timer_mode == 3) pic8259_ir2_w(timer.machine().device("pic8259"), 1); } #define MASTER_CLOCK 6988800 static MACHINE_CONFIG_START( pc100, pc100_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", I8086, MASTER_CLOCK) MCFG_CPU_PROGRAM_MAP(pc100_map) MCFG_CPU_IO_MAP(pc100_io) MCFG_CPU_VBLANK_INT("screen",pc100_vblank_irq) MCFG_MACHINE_START(pc100) MCFG_MACHINE_RESET(pc100) /* 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(1024, 1024) MCFG_SCREEN_VISIBLE_AREA(0, 768-1, 0, 512-1) MCFG_VIDEO_START(pc100) MCFG_SCREEN_UPDATE_STATIC(pc100) MCFG_GFXDECODE(pc100) MCFG_PALETTE_LENGTH(16) // MCFG_PALETTE_INIT(black_and_white) MCFG_TIMER_ADD_PERIODIC("600hz", pc100_600hz_irq, attotime::from_hz(MASTER_CLOCK/600)) MCFG_TIMER_ADD_PERIODIC("100hz", pc100_100hz_irq, attotime::from_hz(MASTER_CLOCK/100)) MCFG_TIMER_ADD_PERIODIC("50hz", pc100_50hz_irq, attotime::from_hz(MASTER_CLOCK/50)) MCFG_TIMER_ADD_PERIODIC("10hz", pc100_10hz_irq, attotime::from_hz(MASTER_CLOCK/10)) MCFG_I8255_ADD( "ppi8255_2", pc100_ppi8255_interface_2 ) MCFG_PIC8259_ADD( "pic8259", pc100_pic8259_config ) MACHINE_CONFIG_END /* ROM definition */ ROM_START( pc100 ) ROM_REGION( 0x8000, "ipl", ROMREGION_ERASEFF ) ROM_LOAD( "ipl.rom", 0x0000, 0x8000, CRC(fd54a80e) SHA1(605a1b598e623ba2908a14a82454b9d32ea3c331)) ROM_REGION( 0x20000, "kanji", ROMREGION_ERASEFF ) ROM_LOAD( "kanji.rom", 0x0000, 0x20000, BAD_DUMP CRC(29298591) SHA1(d10174553ceea556fc53fc4e685d939524a4f64b)) ROM_REGION( 0x20000*4, "vram", ROMREGION_ERASEFF ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 198?, pc100, 0, 0, pc100, pc100, driver_device, 0, "NEC", "PC-100", GAME_NOT_WORKING | GAME_NO_SOUND)