// license:GPL-2.0+ // copyright-holders:Juergen Buchmueller /*************************************************************************** vtech2.c machine driver Juergen Buchmueller MESS driver, Jan 2000 Davide Moretti ROM dump and hardware description TODO: Add loading images from WAV files. Printer and RS232 support. Check if the FDC is really the same as in the Laser 210/310 (aka VZ200/300) series. ****************************************************************************/ #include "emu.h" #include "includes/vtech2.h" #include "imagedev/flopdrv.h" #include "imagedev/cassette.h" #include "sound/speaker.h" /* public */ /* static */ #define TRKSIZE_VZ 0x9a0 /* arbitrary (actually from analyzing format) */ static const UINT8 laser_fdc_wrprot[2] = {0x80, 0x80}; /* wrappers for bank #1 to #4 */ WRITE8_MEMBER(vtech2_state::mwa_bank1 ) { mwa_bank(0,offset,data); } WRITE8_MEMBER(vtech2_state::mwa_bank2 ) { mwa_bank(1,offset,data); } WRITE8_MEMBER(vtech2_state::mwa_bank3 ) { mwa_bank(2,offset,data); } WRITE8_MEMBER(vtech2_state::mwa_bank4 ) { mwa_bank(3,offset,data); } /* wrappers for bank #1 to #4 */ READ8_MEMBER(vtech2_state::mra_bank1 ) { return mra_bank(0,offset); } READ8_MEMBER(vtech2_state::mra_bank2 ) { return mra_bank(1,offset); } READ8_MEMBER(vtech2_state::mra_bank3 ) { return mra_bank(2,offset); } READ8_MEMBER(vtech2_state::mra_bank4 ) { return mra_bank(3,offset); } /* read banked memory (plain ROM/RAM) */ static const char *const mra_bank_hard[4] = { "bank1", /* mapped in 0000-3fff */ "bank2", /* mapped in 4000-7fff */ "bank3", /* mapped in 8000-bfff */ "bank4" /* mapped in c000-ffff */ }; /* write banked memory (plain ROM/RAM) */ static const char *const mwa_bank_hard[4] = { "bank1", /* mapped in 0000-3fff */ "bank2", /* mapped in 4000-7fff */ "bank3", /* mapped in 8000-bfff */ "bank4" /* mapped in c000-ffff */ }; DRIVER_INIT_MEMBER(vtech2_state,laser) { UINT8 *gfx = memregion("gfx2")->base(); int i; m_laser_track_x2[0] = m_laser_track_x2[1] = 80; m_laser_fdc_bits = 8; m_laser_drive = -1; for (i = 0; i < 256; i++) gfx[i] = i; m_laser_latch = -1; m_mem = memregion("maincpu")->base(); // check ROM expansion std::string region_tag; m_cart_rom = memregion(region_tag.assign(m_cart->tag()).append(GENERIC_ROM_REGION_TAG).c_str()); for (i = 0; i < ARRAY_LENGTH(m_laser_bank); i++) m_laser_bank[i] = -1; } void vtech2_state::laser_machine_init(int bank_mask, int video_mask) { m_laser_bank_mask = bank_mask; m_laser_video_bank = video_mask; m_videoram = m_mem + m_laser_video_bank * 0x04000; logerror("laser_machine_init(): bank mask $%04X, video %d [$%05X]\n", m_laser_bank_mask, m_laser_video_bank, m_laser_video_bank * 0x04000); for (int i = 0; i < ARRAY_LENGTH(m_laser_bank); i++) laser_bank_select_w(m_maincpu->space(AS_PROGRAM), i, 0); } void vtech2_state::machine_reset() { /* banks 0 to 3 only, optional ROM extension */ laser_machine_init(0x00f, 3); } MACHINE_RESET_MEMBER(vtech2_state,laser500) { /* banks 0 to 2, and 4-7 only, optional ROM extension */ laser_machine_init(0x0f7, 7); } MACHINE_RESET_MEMBER(vtech2_state,laser700) { /* all banks except #3 */ laser_machine_init(0xff7, 7); } WRITE8_MEMBER(vtech2_state::laser_bank_select_w) { static const char *const bank_name[16] = { "ROM lo","ROM hi","MM I/O","Video RAM lo", "RAM #0","RAM #1","RAM #2","RAM #3", "RAM #4","RAM #5","RAM #6","RAM #7/Video RAM hi", "ext ROM #0","ext ROM #1","ext ROM #2","ext ROM #3" }; char bank[10]; offset %= 4; data &= 15; if( data != m_laser_bank[offset] ) { m_laser_bank[offset] = data; logerror("select bank #%d $%02X [$%05X] %s\n", offset+1, data, 0x4000 * (data & 15), bank_name[data]); /* memory mapped I/O bank selected? */ if (data == 2) { static read8_delegate mra_bank_soft[] = { read8_delegate(FUNC(vtech2_state::mra_bank1), this), read8_delegate(FUNC(vtech2_state::mra_bank2), this), read8_delegate(FUNC(vtech2_state::mra_bank3), this), read8_delegate(FUNC(vtech2_state::mra_bank4), this), }; static write8_delegate mwa_bank_soft[] = { write8_delegate(FUNC(vtech2_state::mwa_bank1), this), write8_delegate(FUNC(vtech2_state::mwa_bank2), this), write8_delegate(FUNC(vtech2_state::mwa_bank3), this), write8_delegate(FUNC(vtech2_state::mwa_bank4), this), }; m_maincpu->space(AS_PROGRAM).install_readwrite_handler(offset * 0x4000, offset * 0x4000 + 0x3fff, mra_bank_soft[offset], mwa_bank_soft[offset]); } else { sprintf(bank, "bank%d", offset + 1); if (data >= 12 && m_cart_rom && (m_cart_rom->bytes() > (data % 12) * 0x4000)) // Expansion ROM banks { membank(bank)->set_base(m_cart_rom->base()+ (data % 12) * 0x4000); m_maincpu->space(AS_PROGRAM).install_read_bank(offset * 0x4000, offset * 0x4000 + 0x3fff, mra_bank_hard[offset]); m_maincpu->space(AS_PROGRAM).install_write_bank(offset * 0x4000, offset * 0x4000 + 0x3fff, mwa_bank_hard[offset]); } else if (data < 12 && (m_laser_bank_mask & (1 << data))) // ROM/RAM banks { // video RAM bank selected? if (data == m_laser_video_bank) logerror("select bank #%d VIDEO!\n", offset + 1); membank(bank)->set_base(&m_mem[0x4000 * m_laser_bank[offset]]); m_maincpu->space(AS_PROGRAM).install_read_bank(offset * 0x4000, offset * 0x4000 + 0x3fff, mra_bank_hard[offset]); m_maincpu->space(AS_PROGRAM).install_write_bank(offset * 0x4000, offset * 0x4000 + 0x3fff, mwa_bank_hard[offset]); } else { logerror("select bank #%d MASKED!\n", offset + 1); m_maincpu->space(AS_PROGRAM).nop_readwrite(offset * 0x4000, offset * 0x4000 + 0x3fff); } } } } /************************************************* * memory mapped I/O read * bit function * 7 not assigned * 6 column 6 * 5 column 5 * 4 column 4 * 3 column 3 * 2 column 2 * 1 column 1 * 0 column 0 ************************************************/ int vtech2_state::mra_bank(int bank, int offs) { UINT8 data = 0x7f; /* Laser 500/700 only: keyboard rows A through D */ if( (offs & 0x00ff) == 0x00ff ) { if( (offs & 0x0300) == 0x0000 ) /* keyboard row A */ { if( ioport("ROWA")->read() != m_row_a ) { m_row_a = ioport("ROWA")->read(); data &= m_row_a; } } if( (offs & 0x0300) == 0x0100 ) /* keyboard row B */ { if( ioport("ROWB")->read() != m_row_b ) { m_row_b = ioport("ROWB")->read(); data &= m_row_b; } } if( (offs & 0x0300) == 0x0200 ) /* keyboard row C */ { if( ioport("ROWC")->read() != m_row_c ) { m_row_c = ioport("ROWC")->read(); data &= m_row_c; } } if( (offs & 0x0300) == 0x0300 ) /* keyboard row D */ { if( ioport("ROWD")->read() != m_row_d ) { m_row_d = ioport("ROWD")->read(); data &= m_row_d; } } } else { /* All Lasers keyboard rows 0 through 7 */ if( !(offs & 0x01) ) data &= ioport("ROW0")->read(); if( !(offs & 0x02) ) data &= ioport("ROW1")->read(); if( !(offs & 0x04) ) data &= ioport("ROW2")->read(); if( !(offs & 0x08) ) data &= ioport("ROW3")->read(); if( !(offs & 0x10) ) data &= ioport("ROW4")->read(); if( !(offs & 0x20) ) data &= ioport("ROW5")->read(); if( !(offs & 0x40) ) data &= ioport("ROW6")->read(); if( !(offs & 0x80) ) data &= ioport("ROW7")->read(); } /* BIT 7 - tape input */ data |= (m_cassette->input() > +0.02) ? 0x80 : 0; return data; } /************************************************* * memory mapped I/O write * bit function * 7-6 not assigned * 5 speaker B ??? * 4 ??? * 3 mode: 1 graphics, 0 text * 2 cassette out (MSB) * 1 cassette out (LSB) * 0 speaker A ************************************************/ void vtech2_state::mwa_bank(int bank, int offs, int data) { offs += 0x4000 * m_laser_bank[bank]; switch (m_laser_bank[bank]) { case 0: /* ROM lower 16K */ case 1: /* ROM upper 16K */ logerror("bank #%d write to ROM [$%05X] $%02X\n", bank+1, offs, data); break; case 2: /* memory mapped output */ if (data != m_laser_latch) { logerror("bank #%d write to I/O [$%05X] $%02X\n", bank+1, offs, data); /* Toggle between graphics and text modes? */ if ((data ^ m_laser_latch) & 0x01) m_speaker->level_w(data & 1); m_laser_latch = data; } m_cassette->output( BIT(data, 2) ? -1.0 : +1.0); break; case 12: /* ext. ROM #1 */ case 13: /* ext. ROM #2 */ case 14: /* ext. ROM #3 */ case 15: /* ext. ROM #4 */ logerror("bank #%d write to ROM [$%05X] $%02X\n", bank+1, offs, data); break; default: /* RAM */ if( m_laser_bank[bank] == m_laser_video_bank && m_mem[offs] != data ) { logerror("bank #%d write to videoram [$%05X] $%02X\n", bank+1, offs, data); } m_mem[offs] = data; break; } } device_t *vtech2_state::laser_file() { return machine().device(m_laser_drive ? FLOPPY_1 : FLOPPY_0); } void vtech2_state::laser_get_track() { sprintf(m_laser_frame_message, "#%d get track %02d", m_laser_drive, m_laser_track_x2[m_laser_drive]/2); m_laser_frame_time = 30; /* drive selected or and image file ok? */ if( m_laser_drive >= 0 && laser_file() != NULL ) { int size, offs; device_image_interface *image = dynamic_cast(laser_file()); size = TRKSIZE_VZ; offs = TRKSIZE_VZ * m_laser_track_x2[m_laser_drive]/2; image->fseek(offs, SEEK_SET); size = image->fread(m_laser_fdc_data, size); logerror("get track @$%05x $%04x bytes\n", offs, size); } m_laser_fdc_offs = 0; m_laser_fdc_write = 0; } void vtech2_state::laser_put_track() { device_image_interface *image = dynamic_cast(laser_file()); /* drive selected and image file ok? */ if( m_laser_drive >= 0 && laser_file() != NULL ) { int size, offs; offs = TRKSIZE_VZ * m_laser_track_x2[m_laser_drive]/2; image->fseek(offs + m_laser_fdc_start, SEEK_SET); size = image->fwrite(&m_laser_fdc_data[m_laser_fdc_start], m_laser_fdc_write); logerror("put track @$%05X+$%X $%04X/$%04X bytes\n", offs, m_laser_fdc_start, size, m_laser_fdc_write); } } #define PHI0(n) (((n)>>0)&1) #define PHI1(n) (((n)>>1)&1) #define PHI2(n) (((n)>>2)&1) #define PHI3(n) (((n)>>3)&1) READ8_MEMBER(vtech2_state::laser_fdc_r) { int data = 0xff; switch( offset ) { case 1: /* data (read-only) */ if( m_laser_fdc_bits > 0 ) { if( m_laser_fdc_status & 0x80 ) m_laser_fdc_bits--; data = (m_laser_data >> m_laser_fdc_bits) & 0xff; #if 0 logerror("laser_fdc_r bits %d%d%d%d%d%d%d%d\n", (data>>7)&1,(data>>6)&1,(data>>5)&1,(data>>4)&1, (data>>3)&1,(data>>2)&1,(data>>1)&1,(data>>0)&1 ); #endif } if( m_laser_fdc_bits == 0 ) { m_laser_data = m_laser_fdc_data[m_laser_fdc_offs]; logerror("laser_fdc_r %d : data ($%04X) $%02X\n", offset, m_laser_fdc_offs, m_laser_data); if( m_laser_fdc_status & 0x80 ) { m_laser_fdc_bits = 8; m_laser_fdc_offs = (m_laser_fdc_offs + 1) % TRKSIZE_FM; } m_laser_fdc_status &= ~0x80; } break; case 2: /* polling (read-only) */ /* fake */ if( m_laser_drive >= 0 ) m_laser_fdc_status |= 0x80; data = m_laser_fdc_status; break; case 3: /* write protect status (read-only) */ if( m_laser_drive >= 0 ) data = laser_fdc_wrprot[m_laser_drive]; logerror("laser_fdc_r %d : write_protect $%02X\n", offset, data); break; } return data; } WRITE8_MEMBER(vtech2_state::laser_fdc_w) { int drive; switch( offset ) { case 0: /* latch (write-only) */ drive = (data & 0x10) ? 0 : (data & 0x80) ? 1 : -1; if( drive != m_laser_drive ) { m_laser_drive = drive; if( m_laser_drive >= 0 ) laser_get_track(); } if( m_laser_drive >= 0 ) { if( (PHI0(data) && !(PHI1(data) || PHI2(data) || PHI3(data)) && PHI1(m_laser_fdc_latch)) || (PHI1(data) && !(PHI0(data) || PHI2(data) || PHI3(data)) && PHI2(m_laser_fdc_latch)) || (PHI2(data) && !(PHI0(data) || PHI1(data) || PHI3(data)) && PHI3(m_laser_fdc_latch)) || (PHI3(data) && !(PHI0(data) || PHI1(data) || PHI2(data)) && PHI0(m_laser_fdc_latch)) ) { if( m_laser_track_x2[m_laser_drive] > 0 ) m_laser_track_x2[m_laser_drive]--; logerror("laser_fdc_w(%d) $%02X drive %d: stepout track #%2d.%d\n", offset, data, m_laser_drive, m_laser_track_x2[m_laser_drive]/2,5*(m_laser_track_x2[m_laser_drive]&1)); if( (m_laser_track_x2[m_laser_drive] & 1) == 0 ) laser_get_track(); } else if( (PHI0(data) && !(PHI1(data) || PHI2(data) || PHI3(data)) && PHI3(m_laser_fdc_latch)) || (PHI1(data) && !(PHI0(data) || PHI2(data) || PHI3(data)) && PHI0(m_laser_fdc_latch)) || (PHI2(data) && !(PHI0(data) || PHI1(data) || PHI3(data)) && PHI1(m_laser_fdc_latch)) || (PHI3(data) && !(PHI0(data) || PHI1(data) || PHI2(data)) && PHI2(m_laser_fdc_latch)) ) { if( m_laser_track_x2[m_laser_drive] < 2*40 ) m_laser_track_x2[m_laser_drive]++; logerror("laser_fdc_w(%d) $%02X drive %d: stepin track #%2d.%d\n", offset, data, m_laser_drive, m_laser_track_x2[m_laser_drive]/2,5*(m_laser_track_x2[m_laser_drive]&1)); if( (m_laser_track_x2[m_laser_drive] & 1) == 0 ) laser_get_track(); } if( (data & 0x40) == 0 ) { m_laser_data <<= 1; if( (m_laser_fdc_latch ^ data) & 0x20 ) m_laser_data |= 1; if( (m_laser_fdc_edge ^= 1) == 0 ) { if( --m_laser_fdc_bits == 0 ) { UINT8 value = 0; m_laser_data &= 0xffff; if( m_laser_data & 0x4000 ) value |= 0x80; if( m_laser_data & 0x1000 ) value |= 0x40; if( m_laser_data & 0x0400 ) value |= 0x20; if( m_laser_data & 0x0100 ) value |= 0x10; if( m_laser_data & 0x0040 ) value |= 0x08; if( m_laser_data & 0x0010 ) value |= 0x04; if( m_laser_data & 0x0004 ) value |= 0x02; if( m_laser_data & 0x0001 ) value |= 0x01; logerror("laser_fdc_w(%d) data($%04X) $%02X <- $%02X ($%04X)\n", offset, m_laser_fdc_offs, m_laser_fdc_data[m_laser_fdc_offs], value, m_laser_data); m_laser_fdc_data[m_laser_fdc_offs] = value; m_laser_fdc_offs = (m_laser_fdc_offs + 1) % TRKSIZE_FM; m_laser_fdc_write++; m_laser_fdc_bits = 8; } } } /* change of write signal? */ if( (m_laser_fdc_latch ^ data) & 0x40 ) { /* falling edge? */ if ( m_laser_fdc_latch & 0x40 ) { sprintf(m_laser_frame_message, "#%d put track %02d", m_laser_drive, m_laser_track_x2[m_laser_drive]/2); m_laser_frame_time = 30; m_laser_fdc_start = m_laser_fdc_offs; m_laser_fdc_edge = 0; } else { /* data written to track before? */ if( m_laser_fdc_write ) laser_put_track(); } m_laser_fdc_bits = 8; m_laser_fdc_write = 0; } } m_laser_fdc_latch = data; break; } }