diff options
Diffstat (limited to 'src/mess/drivers/pasopia.c')
-rw-r--r-- | src/mess/drivers/pasopia.c | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/src/mess/drivers/pasopia.c b/src/mess/drivers/pasopia.c new file mode 100644 index 00000000000..19ff9d318de --- /dev/null +++ b/src/mess/drivers/pasopia.c @@ -0,0 +1,386 @@ +/*************************************************************************** + + Toshiba Pasopia + + TODO: + - just like Pasopia 7, z80pio is broken, hence it doesn't clear irqs + after the first one (0xfe79 is the work ram buffer for keyboard). + - 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 "machine/keyboard.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") + { } + + required_device<cpu_device> m_maincpu; + required_device<i8255_device> m_ppi0; + required_device<i8255_device> m_ppi1; + required_device<i8255_device> m_ppi2; + required_device<z80ctc_device> m_ctc; + required_device<z80pio_device> m_pio; + required_device<mc6845_device> m_crtc; + + 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); + + UINT8 m_hblank; + UINT16 m_vram_addr; + UINT8 m_vram_latch; + UINT8 m_attr_latch; +// UINT8 m_gfx_mode; + bool m_video_wl; + bool m_ram_bank; + UINT8 *m_p_vram; + DECLARE_DRIVER_INIT(pasopia); +}; + +static VIDEO_START( pasopia ) +{ +} + +MC6845_UPDATE_ROW( pasopia_update_row ) +{ + pasopia_state *state = device->machine().driver_data<pasopia_state>(); + const rgb_t *palette = palette_entry_list_raw(bitmap.palette()); + 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_alt, write_alt) +// 0x38 printer + AM_RANGE(0x3c,0x3c) AM_WRITE(pasopia_ctrl_w) +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( pasopia ) +INPUT_PORTS_END + +static MACHINE_START(pasopia) +{ + pasopia_state *state = machine.driver_data<pasopia_state>(); + state->m_p_vram = state->memregion("vram")->base(); + state->m_hblank = 0; + state->membank("bank1")->set_entry(0); + state->membank("bank2")->set_entry(0); +} + +static MACHINE_RESET(pasopia) +{ +} + +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::testa_r ) +{ + printf("A R\n"); + return 0xff; +} + +READ8_MEMBER( pasopia_state::testb_r ) +{ + printf("B R\n"); + return 0xff; +} + +WRITE_LINE_MEMBER( pasopia_state::testa_w ) +{ + printf("A %02x\n",state); +} + +WRITE_LINE_MEMBER( pasopia_state::testb_w ) +{ + printf("B %02x\n",state); +} + +static Z80PIO_INTERFACE( z80pio_intf ) +{ + DEVCB_CPU_INPUT_LINE("maincpu", INPUT_LINE_IRQ0), //doesn't work? + DEVCB_DRIVER_MEMBER(pasopia_state, testa_r), // port A read + DEVCB_NULL, // port A write + DEVCB_DRIVER_LINE_MEMBER(pasopia_state, testa_w), // ready A + DEVCB_DRIVER_MEMBER(pasopia_state, testb_r), // port B read + DEVCB_NULL, // port B write + DEVCB_DRIVER_LINE_MEMBER(pasopia_state, testb_w) // ready B +}; + +static const mc6845_interface mc6845_intf = +{ + "screen", /* screen we are acting on */ + 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 } +}; + +// temporary hack +WRITE8_MEMBER( pasopia_state::kbd_put ) +{ + address_space *mem = m_maincpu->memory().space(AS_PROGRAM); + mem->write_byte(0xfe79, data); +} + +static ASCII_KEYBOARD_INTERFACE( keyboard_intf ) +{ + DEVCB_DRIVER_MEMBER(pasopia_state, kbd_put) +}; + +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]); +} + +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) + + MCFG_MACHINE_START(pasopia) + MCFG_MACHINE_RESET(pasopia) + + /* 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_VIDEO_START(pasopia) + MCFG_SCREEN_UPDATE_DEVICE("crtc", h46505_device, screen_update) + MCFG_GFXDECODE(pasopia) + MCFG_PALETTE_LENGTH(8) + + /* Devices */ + MCFG_MC6845_ADD("crtc", H46505, 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 ) + + // temporary hack + MCFG_ASCII_KEYBOARD_ADD(KEYBOARD_TAG, keyboard_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) |