diff options
author | 2012-08-21 10:41:19 +0000 | |
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committer | 2012-08-21 10:41:19 +0000 | |
commit | 7285b359d259b2ae0fdf85096571c386ec8c991a (patch) | |
tree | a027aff57f1a255f9ec6cfd3b68cabe4b6683998 /src/mess/drivers/pc100.c | |
parent | 67c425e90757876a6716b7867df30c0149912e74 (diff) |
Merge of MESS sources (no whatsnew)
Diffstat (limited to 'src/mess/drivers/pc100.c')
-rw-r--r-- | src/mess/drivers/pc100.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/src/mess/drivers/pc100.c b/src/mess/drivers/pc100.c new file mode 100644 index 00000000000..09b682de18f --- /dev/null +++ b/src/mess/drivers/pc100.c @@ -0,0 +1,426 @@ +/*************************************************************************** + + 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<UINT16> 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<pc100_state>(); + 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]<<pen_i; + + if(y < 512 && x*16+xi < 768) /* TODO: safety check */ + bitmap.pix16(y, x*16+xi) = screen.machine().pens[dot]; + } + + count++; + } + } + + return 0; +} + +READ16_MEMBER( pc100_state::pc100_vram_r ) +{ + return m_vram[offset+m_bank_r*0x10000]; +} + +WRITE16_MEMBER( pc100_state::pc100_vram_w ) +{ + UINT16 old_vram; + int i; + + for(i=0;i<4;i++) + { + if((m_bank_w >> 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<pc100_state>(); + + 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<pc100_state>(); + + 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<pc100_state>(); + + 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<pc100_state>(); + + 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<pc100_state>(); + + 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) |