/*************************************************************************** Toshiba Pasopia TODO: - machine emulation needs merging with Pasopia 7 (video emulation is completely different tho) ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/i8255.h" #include "machine/z80ctc.h" #include "machine/z80pio.h" #include "video/mc6845.h" #include "includes/pasopia.h" class pasopia_state : public driver_device { public: pasopia_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_ppi0(*this, "ppi8255_0"), m_ppi1(*this, "ppi8255_1"), m_ppi2(*this, "ppi8255_2"), m_ctc(*this, "z80ctc"), m_pio(*this, "z80pio"), m_crtc(*this, "crtc"), m_palette(*this, "palette") { } required_device m_maincpu; required_device m_ppi0; required_device m_ppi1; required_device m_ppi2; required_device m_ctc; required_device m_pio; required_device m_crtc; required_device m_palette; DECLARE_READ8_MEMBER(pasopia_romram_r); DECLARE_WRITE8_MEMBER(pasopia_ram_w); DECLARE_WRITE8_MEMBER(pasopia_ctrl_w); DECLARE_WRITE8_MEMBER(vram_addr_lo_w); DECLARE_WRITE8_MEMBER(vram_latch_w); DECLARE_READ8_MEMBER(vram_latch_r); DECLARE_READ8_MEMBER(portb_1_r); DECLARE_WRITE8_MEMBER(vram_addr_hi_w); DECLARE_WRITE8_MEMBER(screen_mode_w); DECLARE_READ8_MEMBER(rombank_r); DECLARE_READ8_MEMBER(testa_r); DECLARE_READ8_MEMBER(testb_r); DECLARE_WRITE_LINE_MEMBER(testa_w); DECLARE_WRITE_LINE_MEMBER(testb_w); DECLARE_WRITE8_MEMBER(kbd_put); DECLARE_READ8_MEMBER(mux_r); DECLARE_READ8_MEMBER(keyb_r); DECLARE_WRITE8_MEMBER(mux_w); UINT8 m_hblank; UINT16 m_vram_addr; UINT8 m_vram_latch; UINT8 m_attr_latch; // UINT8 m_gfx_mode; UINT8 m_mux_data; bool m_video_wl; bool m_ram_bank; UINT8 *m_p_vram; DECLARE_DRIVER_INIT(pasopia); TIMER_CALLBACK_MEMBER(pio_timer); virtual void machine_start(); virtual void machine_reset(); virtual void video_start(); }; // needed to scan the keyboard, as the pio emulation doesn't do it. TIMER_CALLBACK_MEMBER(pasopia_state::pio_timer) { m_pio->port_b_write(keyb_r(generic_space(),0,0xff)); } void pasopia_state::video_start() { } MC6845_UPDATE_ROW( pasopia_update_row ) { pasopia_state *state = device->machine().driver_data(); const rgb_t *palette = state->m_palette->palette()->entry_list_raw(); UINT8 *m_p_chargen = state->memregion("chargen")->base(); UINT8 chr,gfx,fg=7,bg=0; // colours need to be determined UINT16 mem,x; UINT32 *p = &bitmap.pix32(y); for (x = 0; x < x_count; x++) { UINT8 inv=0; if (x == cursor_x) inv=0xff; mem = (ma + x) & 0xfff; chr = state->m_p_vram[mem]; /* get pattern of pixels for that character scanline */ gfx = m_p_chargen[(chr<<3) | ra] ^ inv; /* Display a scanline of a character */ *p++ = palette[BIT(gfx, 7) ? fg : bg]; *p++ = palette[BIT(gfx, 6) ? fg : bg]; *p++ = palette[BIT(gfx, 5) ? fg : bg]; *p++ = palette[BIT(gfx, 4) ? fg : bg]; *p++ = palette[BIT(gfx, 3) ? fg : bg]; *p++ = palette[BIT(gfx, 2) ? fg : bg]; *p++ = palette[BIT(gfx, 1) ? fg : bg]; *p++ = palette[BIT(gfx, 0) ? fg : bg]; } } WRITE8_MEMBER( pasopia_state::pasopia_ctrl_w ) { m_ram_bank = BIT(data, 1); membank("bank1")->set_entry(m_ram_bank); } static ADDRESS_MAP_START(pasopia_map, AS_PROGRAM, 8, pasopia_state) AM_RANGE(0x0000,0x7fff) AM_READ_BANK("bank1") AM_WRITE_BANK("bank2") AM_RANGE(0x8000,0xffff) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(pasopia_io, AS_IO, 8, pasopia_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00,0x03) AM_DEVREADWRITE("ppi8255_0", i8255_device, read, write) AM_RANGE(0x08,0x0b) AM_DEVREADWRITE("ppi8255_1", i8255_device, read, write) AM_RANGE(0x10,0x10) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) AM_RANGE(0x11,0x11) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) // 0x18 - 0x1b pac2 // 0x1c - 0x1f something AM_RANGE(0x20,0x23) AM_DEVREADWRITE("ppi8255_2", i8255_device, read, write) AM_RANGE(0x28,0x2b) AM_DEVREADWRITE("z80ctc", z80ctc_device, read, write) AM_RANGE(0x30,0x33) AM_DEVREADWRITE("z80pio", z80pio_device, read, write) // 0x38 printer AM_RANGE(0x3c,0x3c) AM_WRITE(pasopia_ctrl_w) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( pasopia ) PASOPIA_KEYBOARD INPUT_PORTS_END void pasopia_state::machine_start() { m_p_vram = memregion("vram")->base(); m_hblank = 0; membank("bank1")->set_entry(0); membank("bank2")->set_entry(0); } void pasopia_state::machine_reset() { } WRITE8_MEMBER( pasopia_state::vram_addr_lo_w ) { m_vram_addr = (m_vram_addr & 0x3f00) | data; } WRITE8_MEMBER( pasopia_state::vram_latch_w ) { m_vram_latch = data; } READ8_MEMBER( pasopia_state::vram_latch_r ) { return m_p_vram[m_vram_addr]; } static I8255A_INTERFACE( ppi8255_intf_0 ) { DEVCB_NULL, /* Port A read */ DEVCB_DRIVER_MEMBER(pasopia_state, vram_addr_lo_w), /* Port A write */ DEVCB_NULL, /* Port B read */ DEVCB_DRIVER_MEMBER(pasopia_state, vram_latch_w), /* Port B write */ DEVCB_DRIVER_MEMBER(pasopia_state, vram_latch_r), /* Port C read */ DEVCB_NULL /* Port C write */ }; READ8_MEMBER( pasopia_state::portb_1_r ) { /* x--- ---- attribute latch -x-- ---- hblank --x- ---- vblank ---x ---- LCD system mode, active low */ UINT8 grph_latch,lcd_mode; m_hblank ^= 0x40; //TODO grph_latch = (m_p_vram[m_vram_addr | 0x4000] & 0x80); lcd_mode = 0x10; return m_hblank | lcd_mode | grph_latch; //bit 4: LCD mode } WRITE8_MEMBER( pasopia_state::vram_addr_hi_w ) { m_attr_latch = (data & 0x80) | (m_attr_latch & 0x7f); if ( BIT(data, 6) && !m_video_wl ) { m_p_vram[m_vram_addr] = m_vram_latch; m_p_vram[m_vram_addr | 0x4000] = m_attr_latch; } m_video_wl = BIT(data, 6); m_vram_addr = (m_vram_addr & 0xff) | ((data & 0x3f) << 8); } WRITE8_MEMBER( pasopia_state::screen_mode_w ) { //m_gfx_mode = (data & 0xe0) >> 5; unused variable m_attr_latch = (m_attr_latch & 0x80) | (data & 7); printf("Screen Mode=%02x\n",data); } static I8255A_INTERFACE( ppi8255_intf_1 ) { DEVCB_NULL, /* Port A read */ DEVCB_DRIVER_MEMBER(pasopia_state, screen_mode_w), /* Port A write */ DEVCB_DRIVER_MEMBER(pasopia_state, portb_1_r), /* Port B read */ DEVCB_NULL, /* Port B write */ DEVCB_NULL, /* Port C read */ DEVCB_DRIVER_MEMBER(pasopia_state, vram_addr_hi_w) /* Port C write */ }; READ8_MEMBER( pasopia_state::rombank_r ) { return (m_ram_bank) ? 4 : 0; } static I8255A_INTERFACE( ppi8255_intf_2 ) { DEVCB_NULL, /* Port A read */ DEVCB_NULL, /* Port A write */ DEVCB_NULL, /* Port B read */ DEVCB_NULL, /* Port B write */ DEVCB_DRIVER_MEMBER(pasopia_state, rombank_r), /* Port C read */ DEVCB_NULL /* Port C write */ }; static Z80CTC_INTERFACE( ctc_intf ) { DEVCB_CPU_INPUT_LINE("maincpu", INPUT_LINE_IRQ0), // interrupt handler DEVCB_DEVICE_LINE_MEMBER("z80ctc", z80ctc_device, trg1), // ZC/TO0 callback DEVCB_DEVICE_LINE_MEMBER("z80ctc", z80ctc_device, trg2), // ZC/TO1 callback, beep interface DEVCB_DEVICE_LINE_MEMBER("z80ctc", z80ctc_device, trg3) // ZC/TO2 callback }; READ8_MEMBER( pasopia_state::mux_r ) { return m_mux_data; } READ8_MEMBER( pasopia_state::keyb_r ) { const char *const keynames[3][4] = { { "KEY0", "KEY1", "KEY2", "KEY3" }, { "KEY4", "KEY5", "KEY6", "KEY7" }, { "KEY8", "KEY9", "KEYA", "KEYB" } }; int i,j; UINT8 res; res = 0; for(j=0;j<3;j++) { if(m_mux_data & 0x10 << j) { for(i=0;i<4;i++) { if(m_mux_data & 1 << i) res |= ioport(keynames[j][i])->read(); } } } return res ^ 0xff; } WRITE8_MEMBER( pasopia_state::mux_w ) { m_mux_data = data; } static Z80PIO_INTERFACE( z80pio_intf ) { DEVCB_CPU_INPUT_LINE("maincpu", INPUT_LINE_IRQ0), //IRQ DEVCB_DRIVER_MEMBER(pasopia_state, mux_r), // in port A DEVCB_DRIVER_MEMBER(pasopia_state, mux_w), // out port A DEVCB_NULL, DEVCB_DRIVER_MEMBER(pasopia_state, keyb_r), // in port B DEVCB_NULL, // out port B DEVCB_NULL }; static MC6845_INTERFACE( mc6845_intf ) { false, /* show border area */ 0,0,0,0, /* visarea adjustment */ 8, /* number of pixels per video memory address */ NULL, /* before pixel update callback */ pasopia_update_row, /* row update callback */ NULL, /* after pixel update callback */ DEVCB_NULL, /* callback for display state changes */ DEVCB_NULL, /* callback for cursor state changes */ DEVCB_NULL, /* HSYNC callback */ DEVCB_NULL, /* VSYNC callback */ NULL /* update address callback */ }; static const gfx_layout p7_chars_8x8 = { 8,8, RGN_FRAC(1,1), 1, { 0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 }, 8*8 }; static GFXDECODE_START( pasopia ) GFXDECODE_ENTRY( "chargen", 0x0000, p7_chars_8x8, 0, 4 ) GFXDECODE_END static const z80_daisy_config pasopia_daisy[] = { { "z80ctc" }, { "z80pio" }, // { "upd765" }, /* TODO */ { NULL } }; DRIVER_INIT_MEMBER(pasopia_state,pasopia) { /* We preset all banks here, so that bankswitching will incur no speed penalty. 0000 indicates ROMs, 10000 indicates RAM. */ UINT8 *p_ram = memregion("maincpu")->base(); membank("bank1")->configure_entries(0, 2, &p_ram[0x00000], 0x10000); membank("bank2")->configure_entry(0, &p_ram[0x10000]); machine().scheduler().timer_pulse(attotime::from_hz(500), timer_expired_delegate(FUNC(pasopia_state::pio_timer),this)); } static MACHINE_CONFIG_START( pasopia, pasopia_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", Z80, 4000000) MCFG_CPU_PROGRAM_MAP(pasopia_map) MCFG_CPU_IO_MAP(pasopia_io) MCFG_CPU_CONFIG(pasopia_daisy) /* 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, 480) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) MCFG_SCREEN_UPDATE_DEVICE("crtc", h46505_device, screen_update) MCFG_GFXDECODE_ADD("gfxdecode", "palette", pasopia) MCFG_PALETTE_ADD("palette", 8) /* Devices */ MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL_4MHz/4, mc6845_intf) /* unknown clock, hand tuned to get ~60 fps */ MCFG_I8255A_ADD( "ppi8255_0", ppi8255_intf_0 ) MCFG_I8255A_ADD( "ppi8255_1", ppi8255_intf_1 ) MCFG_I8255A_ADD( "ppi8255_2", ppi8255_intf_2 ) MCFG_Z80CTC_ADD( "z80ctc", XTAL_4MHz, ctc_intf ) MCFG_Z80PIO_ADD( "z80pio", XTAL_4MHz, z80pio_intf ) MACHINE_CONFIG_END /* ROM definition */ ROM_START( pasopia ) ROM_REGION( 0x18000, "maincpu", 0 ) ROM_LOAD( "tbasic.rom", 0x0000, 0x8000, CRC(f53774ff) SHA1(bbec45a3bad8d184505cc6fe1f6e2e60a7fb53f2)) ROM_REGION( 0x0800, "chargen", 0 ) ROM_LOAD( "font.rom", 0x0000, 0x0800, BAD_DUMP CRC(a91c45a9) SHA1(a472adf791b9bac3dfa6437662e1a9e94a88b412)) //stolen from pasopia7 ROM_REGION( 0x8000, "vram", ROMREGION_ERASE00 ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1986, pasopia, 0, 0, pasopia, pasopia, pasopia_state, pasopia, "Toshiba", "Pasopia", GAME_NOT_WORKING | GAME_NO_SOUND)