// license:BSD-3-Clause // copyright-holders:Angelo Salese /*************************************************************************** Toshiba Pasopia TODO: - machine emulation needs merging with Pasopia 7 (video emulation is completely different tho) ****************************************************************************/ #include "emu.h" #include "includes/pasopia.h" #include "cpu/z80/z80.h" #include "machine/i8255.h" #include "machine/z80ctc.h" #include "machine/z80pio.h" #include "video/mc6845.h" #include "emupal.h" #include "screen.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_p_chargen(*this, "chargen") , m_p_vram(*this, "vram") , 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") , m_keyboard(*this, "KEY.%u", 0) { } void pasopia(machine_config &config); void init_pasopia(); private: 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(keyb_r); DECLARE_WRITE8_MEMBER(mux_w); MC6845_UPDATE_ROW(crtc_update_row); TIMER_CALLBACK_MEMBER(pio_timer); void pasopia_io(address_map &map); void pasopia_map(address_map &map); uint8_t m_hblank; uint16_t m_vram_addr; uint8_t m_vram_latch; uint8_t m_attr_latch; // uint8_t m_gfx_mode; uint8_t m_mux_data; bool m_video_wl; bool m_ram_bank; emu_timer *m_pio_timer; virtual void machine_start() override; virtual void machine_reset() override; required_device m_maincpu; required_region_ptr m_p_chargen; required_region_ptr m_p_vram; 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; required_ioport_array<12> m_keyboard; }; // 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)); } MC6845_UPDATE_ROW( pasopia_state::crtc_update_row ) { const rgb_t *palette = m_palette->palette()->entry_list_raw(); uint8_t chr,gfx,fg=7,bg=0; // colours need to be determined uint16_t mem,x; uint32_t *p = &bitmap.pix32(y); for (x = 0; x < x_count; x++) { uint8_t inv=0; if (x == cursor_x) inv=0xff; mem = ma + x; chr = m_p_vram[mem & 0x7ff]; /* 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); } void pasopia_state::pasopia_map(address_map &map) { map(0x0000, 0x7fff).bankr("bank1").bankw("bank2"); map(0x8000, 0xffff).ram(); } void pasopia_state::pasopia_io(address_map &map) { map.unmap_value_high(); map.global_mask(0xff); map(0x00, 0x03).rw(m_ppi0, FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x08, 0x0b).rw(m_ppi1, FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x10, 0x10).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w)); map(0x11, 0x11).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); // 0x18 - 0x1b pac2 // 0x1c - 0x1f something map(0x20, 0x23).rw(m_ppi2, FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x28, 0x2b).rw(m_ctc, FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0x30, 0x33).rw(m_pio, FUNC(z80pio_device::read), FUNC(z80pio_device::write)); // 0x38 printer map(0x3c, 0x3c).w(FUNC(pasopia_state::pasopia_ctrl_w)); } /* Input ports */ static INPUT_PORTS_START( pasopia ) PASOPIA_KEYBOARD INPUT_PORTS_END void pasopia_state::machine_start() { 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]; } READ8_MEMBER( pasopia_state::portb_1_r ) { /* x--- ---- attribute latch -x-- ---- hblank --x- ---- vblank ---x ---- LCD system mode, active low */ uint8_t 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); } READ8_MEMBER( pasopia_state::rombank_r ) { return (m_ram_bank) ? 4 : 0; } READ8_MEMBER( pasopia_state::keyb_r ) { uint8_t i,j,res = 0; for (j=0; j<3; j++) { if (BIT(m_mux_data, 4+j)) { for (i=0; i<4; i++) { if (BIT(m_mux_data, i)) res |= m_keyboard[j*4+i]->read(); } } } return res ^ 0xff; } WRITE8_MEMBER( pasopia_state::mux_w ) { m_mux_data = data; } 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( gfx_pasopia ) GFXDECODE_ENTRY( "chargen", 0x0000, p7_chars_8x8, 0, 4 ) GFXDECODE_END static const z80_daisy_config pasopia_daisy[] = { { "z80ctc" }, { "z80pio" }, // { "upd765" }, /* TODO */ { nullptr } }; void pasopia_state::init_pasopia() { /* We preset all banks here, so that bankswitching will incur no speed penalty. 0000 indicates ROMs, 10000 indicates RAM. */ uint8_t *ram = memregion("maincpu")->base(); membank("bank1")->configure_entries(0, 2, &ram[0x00000], 0x10000); membank("bank2")->configure_entry(0, &ram[0x10000]); m_pio_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(pasopia_state::pio_timer), this)); m_pio_timer->adjust(attotime::from_hz(50), 0, attotime::from_hz(50)); } MACHINE_CONFIG_START(pasopia_state::pasopia) /* basic machine hardware */ Z80(config, m_maincpu, 4000000); m_maincpu->set_addrmap(AS_PROGRAM, &pasopia_state::pasopia_map); m_maincpu->set_addrmap(AS_IO, &pasopia_state::pasopia_io); m_maincpu->set_daisy_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_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_pasopia) MCFG_PALETTE_ADD("palette", 8) /* Devices */ H46505(config, m_crtc, XTAL(4'000'000)/4); /* unknown clock, hand tuned to get ~60 fps */ m_crtc->set_screen("screen"); m_crtc->set_show_border_area(false); m_crtc->set_char_width(8); m_crtc->set_update_row_callback(FUNC(pasopia_state::crtc_update_row), this); I8255A(config, m_ppi0); m_ppi0->out_pa_callback().set(FUNC(pasopia_state::vram_addr_lo_w)); m_ppi0->out_pb_callback().set(FUNC(pasopia_state::vram_latch_w)); m_ppi0->in_pc_callback().set(FUNC(pasopia_state::vram_latch_r)); I8255A(config, m_ppi1); m_ppi1->out_pa_callback().set(FUNC(pasopia_state::screen_mode_w)); m_ppi1->in_pb_callback().set(FUNC(pasopia_state::portb_1_r)); m_ppi1->out_pc_callback().set(FUNC(pasopia_state::vram_addr_hi_w)); I8255A(config, m_ppi2); m_ppi2->in_pc_callback().set(FUNC(pasopia_state::rombank_r)); Z80CTC(config, m_ctc, XTAL(4'000'000)); m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_ctc->zc_callback<0>().set(m_ctc, FUNC(z80ctc_device::trg1)); m_ctc->zc_callback<1>().set(m_ctc, FUNC(z80ctc_device::trg2)); m_ctc->zc_callback<2>().set(m_ctc, FUNC(z80ctc_device::trg3)); Z80PIO(config, m_pio, XTAL(4'000'000)); m_pio->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_pio->out_pa_callback().set(FUNC(pasopia_state::mux_w)); m_pio->in_pb_callback().set(FUNC(pasopia_state::keyb_r)); 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 CLASS INIT COMPANY FULLNAME FLAGS COMP( 1986, pasopia, 0, 0, pasopia, pasopia, pasopia_state, init_pasopia, "Toshiba", "Pasopia", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )