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mame/src/mess/drivers/pasopia.c

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/***************************************************************************
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"
#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")
{ }
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);
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);
virtual void machine_start();
virtual void machine_reset();
virtual void video_start();
};
void pasopia_state::video_start()
{
}
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, 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), //doesn't work?
DEVCB_DRIVER_MEMBER(pasopia_state, mux_r),
DEVCB_DRIVER_MEMBER(pasopia_state, mux_w),
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(pasopia_state, keyb_r),
DEVCB_NULL,
DEVCB_NULL
};
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 }
};
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)
/* 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(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 )
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)
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