// license:BSD-3-Clause // copyright-holders:Wilbert Pol /*************************************************************************** Osborne Executive driver file ***************************************************************************/ #include "emu.h" #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "cpu/z80/z80daisy.h" #include "machine/6821pia.h" #include "machine/input_merger.h" #include "machine/pit8253.h" #include "machine/ram.h" #include "machine/wd_fdc.h" #include "machine/z80sio.h" #include "sound/spkrdev.h" #include "screen.h" #include "softlist.h" #include "speaker.h" #define MAIN_CLOCK XTAL(23'961'600) #define MODEM_PORT_TAG "modem" #define PRINTER_PORT_TAG "printer" class osbexec_state : public driver_device { public: osbexec_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu( *this, "maincpu" ), m_screen( *this, "screen" ), m_mb8877( *this, "mb8877" ), m_messram( *this, RAM_TAG ), m_pia_0( *this, "pia_0" ), m_pia_1( *this, "pia_1" ), m_sio( *this, "sio" ), m_speaker( *this, "speaker" ), m_floppy0( *this, "mb8877:0:525ssdd" ), m_floppy1( *this, "mb8877:1:525ssdd" ) { } required_device m_maincpu; required_device m_screen; required_device m_mb8877; required_device m_messram; required_device m_pia_0; required_device m_pia_1; required_device m_sio; required_device m_speaker; required_device m_floppy0; required_device m_floppy1; virtual void video_start() override; uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); bitmap_ind16 m_bitmap; memory_region *m_fontram_region; memory_region *m_vram_region; uint8_t *m_fontram; uint8_t *m_vram; uint8_t *m_ram_0000; uint8_t *m_ram_c000; uint8_t m_temp_attr; emu_timer *m_video_timer; /* PIA 0 (UD12) */ uint8_t m_pia0_porta; uint8_t m_pia0_portb; int m_pia0_cb2; /* 60/50 */ /* PIA 1 (UD8) */ /* Vblank counter ("RTC") */ uint8_t m_rtc; void set_banks() { uint8_t *ram_ptr = m_messram->pointer(); m_ram_0000 = ram_ptr; if ( m_pia0_porta & 0x01 ) m_ram_0000 += 0x10000; membank( "0000" )->set_base( m_ram_0000 + 0x0000 ); membank( "2000" )->set_base( m_ram_0000 + 0x2000 ); membank( "4000" )->set_base( m_ram_0000 + 0x4000 ); m_ram_c000 = m_ram_0000 + 0xc000; membank( "e000" )->set_base( m_ram_0000 + 0xe000 ); if ( m_pia0_porta & 0x80 ) { membank( "0000" )->set_base( memregion("maincpu")->base()); /* When BIOS is enabled 2000-3FFF is set to the "ROM RAM" */ membank( "2000" )->set_base( ram_ptr + 0x20000 ); } if ( m_pia0_porta & 0x40 ) m_ram_c000 = m_vram_region->base(); } DECLARE_WRITE8_MEMBER(osbexec_0000_w); DECLARE_READ8_MEMBER(osbexec_c000_r); DECLARE_WRITE8_MEMBER(osbexec_c000_w); DECLARE_READ8_MEMBER(osbexec_kbd_r); DECLARE_READ8_MEMBER(osbexec_rtc_r); DECLARE_DRIVER_INIT(osbexec); virtual void machine_reset() override; TIMER_CALLBACK_MEMBER(osbexec_video_callback); DECLARE_READ8_MEMBER(osbexec_pia0_a_r); DECLARE_WRITE8_MEMBER(osbexec_pia0_a_w); DECLARE_READ8_MEMBER(osbexec_pia0_b_r); DECLARE_WRITE8_MEMBER(osbexec_pia0_b_w); DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_ca2_w); DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_cb2_w); DECLARE_WRITE_LINE_MEMBER(modem_txclk_w); DECLARE_WRITE_LINE_MEMBER(modem_rxclk_w); DECLARE_WRITE_LINE_MEMBER(modem_dsr_w); DECLARE_WRITE_LINE_MEMBER(modem_ri_w); DECLARE_WRITE_LINE_MEMBER(comm_clk_a_w); void osbexec(machine_config &config); void osbexec_io(address_map &map); void osbexec_mem(address_map &map); }; WRITE8_MEMBER(osbexec_state::osbexec_0000_w) { /* Font RAM writing is enabled when ROM bank is enabled */ if ( m_pia0_porta & 0x80 ) { if ( offset < 0x1000 ) m_fontram[ offset ] = data; } else { m_ram_0000[ offset ] = data; } } READ8_MEMBER(osbexec_state::osbexec_c000_r) { uint8_t data = m_ram_c000[offset]; if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 ) { m_temp_attr = m_ram_c000[ 0x1000 + offset ]; } return data; } WRITE8_MEMBER(osbexec_state::osbexec_c000_w) { m_ram_c000[offset] = data; if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 ) { m_ram_c000[ 0x1000 + offset ] = m_temp_attr; } } READ8_MEMBER(osbexec_state::osbexec_kbd_r) { uint8_t data = 0xFF; if ( offset & 0x0100 ) data &= ioport( "ROW0" )->read(); if ( offset & 0x0200 ) data &= ioport( "ROW1" )->read(); if ( offset & 0x0400 ) data &= ioport( "ROW2" )->read(); if ( offset & 0x0800 ) data &= ioport( "ROW3" )->read(); if ( offset & 0x1000 ) data &= ioport( "ROW4" )->read(); if ( offset & 0x2000 ) data &= ioport( "ROW5" )->read(); if ( offset & 0x4000 ) data &= ioport( "ROW6" )->read(); if ( offset & 0x8000 ) data &= ioport( "ROW7" )->read(); return data; } READ8_MEMBER(osbexec_state::osbexec_rtc_r) { return m_rtc; } void osbexec_state::osbexec_mem(address_map &map) { map(0x0000, 0x1FFF).bankr("0000").w(this, FUNC(osbexec_state::osbexec_0000_w)); /* ROM and maybe also banked ram */ map(0x2000, 0x3FFF).bankrw("2000"); /* Banked RAM */ map(0x4000, 0xBFFF).bankrw("4000"); /* Banked RAM */ map(0xC000, 0xDFFF).rw(this, FUNC(osbexec_state::osbexec_c000_r), FUNC(osbexec_state::osbexec_c000_w)); /* Video ram / Banked RAM */ map(0xE000, 0xEFFF).bankrw("e000"); /* Banked RAM */ map(0xF000, 0xFFFF).ram(); /* 4KB of non-banked RAM for system stack etc */ } void osbexec_state::osbexec_io(address_map &map) { map.unmap_value_high(); map(0x00, 0x03).mirror(0xff00).rw(m_pia_0, FUNC(pia6821_device::read), FUNC(pia6821_device::write)); /* 6821 PIA @ UD12 */ map(0x04, 0x07).mirror(0xff00).rw("ctc", FUNC(pit8253_device::read), FUNC(pit8253_device::write)); /* 8253 @UD1 */ map(0x08, 0x0B).mirror(0xff00).rw(m_mb8877, FUNC(wd_fdc_device_base::read), FUNC(wd_fdc_device_base::write)); /* MB8877 @ UB17 input clock = 1MHz */ map(0x0C, 0x0F).mirror(0xff00).rw(m_sio, FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); /* SIO @ UD4 */ map(0x10, 0x13).mirror(0xff00).rw(m_pia_1, FUNC(pia6821_device::read), FUNC(pia6821_device::write)); /* 6821 PIA @ UD8 */ map(0x14, 0x17).select(0xff00).r(this, FUNC(osbexec_state::osbexec_kbd_r)); /* KBD */ map(0x18, 0x1b).mirror(0xff00).r(this, FUNC(osbexec_state::osbexec_rtc_r)); /* "RTC" @ UE13/UF13 */ /* ?? - vid ? */ } static INPUT_PORTS_START( osbexec ) PORT_START("ROW0") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('[') PORT_CHAR(']') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('\'') PORT_CHAR('"') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) PORT_START("ROW1") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_START("ROW2") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_START("ROW3") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_START("ROW4") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_START("ROW5") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_START("ROW6") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('\\') PORT_CHAR('|') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_START("ROW7") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) PORT_DIPNAME( 0x08, 0, "Alpha Lock" ) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) INPUT_PORTS_END void osbexec_state::video_start() { m_screen->register_screen_bitmap(m_bitmap); } uint32_t osbexec_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect); return 0; } /* UD12 - 6821 PIA Port A: PA7 - ROM BANK ENA PA6 - VRAM BANK ENA PA5 - BANK6ENA PA4 - BANK5ENA PA3 - BANK4ENA PA2 - BANK3ENA PA1 - BANK2ENA PA0 - BANK1ENA CA1 - DMA IRQ CA2 - KBD STB (i/o) Port B: PB7 - MODEM RI (input) PB6 - MODEM DSR (input) PB5 - TXC SEL PB4 - RXC SEL PB3 - speaker PB2 - DSEL2 PB1 - DSEL1 PB0 - DDEN CB1 - VBlank (input) CB2 - 60/50 (?) */ READ8_MEMBER(osbexec_state::osbexec_pia0_a_r) { return m_pia0_porta; } WRITE8_MEMBER(osbexec_state::osbexec_pia0_a_w) { //logerror("osbexec_pia0_a_w: %02x\n", data ); m_pia0_porta = data; set_banks(); } READ8_MEMBER(osbexec_state::osbexec_pia0_b_r) { return m_pia0_portb; } WRITE8_MEMBER(osbexec_state::osbexec_pia0_b_w) { m_pia0_portb = (m_pia0_portb & 0xc0) | (data & 0x3f); m_speaker->level_w(!BIT(data, 3)); switch ( data & 0x06 ) { case 0x02: m_mb8877->set_floppy(m_floppy1); m_floppy1->mon_w(0); break; case 0x04: m_mb8877->set_floppy(m_floppy0); m_floppy0->mon_w(0); break; default: m_mb8877->set_floppy(nullptr); break; } m_mb8877->dden_w(( data & 0x01 ) ? 1 : 0 ); } WRITE_LINE_MEMBER(osbexec_state::osbexec_pia0_ca2_w) { logerror("osbexec_pia0_ca2_w: state = %d\n", state); } WRITE_LINE_MEMBER(osbexec_state::osbexec_pia0_cb2_w) { m_pia0_cb2 = state; } WRITE_LINE_MEMBER(osbexec_state::modem_txclk_w) { if (BIT(m_pia0_portb, 5)) m_sio->txca_w(!state); } WRITE_LINE_MEMBER(osbexec_state::modem_rxclk_w) { if (BIT(m_pia0_portb, 4)) m_sio->rxca_w(!state); } WRITE_LINE_MEMBER(osbexec_state::modem_dsr_w) { m_pia0_portb &= 0xbf; if (!state) m_pia0_portb |= 0x40; } WRITE_LINE_MEMBER(osbexec_state::modem_ri_w) { m_pia0_portb &= 0x7f; if (!state) m_pia0_portb |= 0x80; } WRITE_LINE_MEMBER(osbexec_state::comm_clk_a_w) { //if (!BIT(m_pia0_portb, 5)) m_sio->txca_w(state); //if (!BIT(m_pia0_portb, 4)) m_sio->rxca_w(state); //m_modem->txclk_w(!state); } /* * The Osborne Executive supports the following disc formats: (TODO: Verify) * - Osborne single density: 40 tracks, 10 sectors per track, 256-byte sectors (100 KByte) * - Osborne double density: 40 tracks, 5 sectors per track, 1024-byte sectors (200 KByte) * - IBM Personal Computer: 40 tracks, 8 sectors per track, 512-byte sectors (160 KByte) * - Xerox 820 Computer: 40 tracks, 18 sectors per track, 128-byte sectors (90 KByte) * - DEC 1820 double density: 40 tracks, 9 sectors per track, 512-byte sectors (180 KByte) * */ static void osborne2_floppies(device_slot_interface &device) { device.option_add("525ssdd", FLOPPY_525_SSDD); } TIMER_CALLBACK_MEMBER(osbexec_state::osbexec_video_callback) { int y = m_screen->vpos(); /* Start of frame */ if ( y == 0 ) { /* Clear CB1 on PIA @ UD12 */ m_pia_0->cb1_w(0); } else if ( y == 240 ) { /* Set CB1 on PIA @ UD12 */ m_pia_0->cb1_w(1); m_rtc++; } if ( y < 240 ) { uint16_t row_addr = ( y / 10 ) * 128; uint16_t *p = &m_bitmap.pix16(y); uint8_t char_line = y % 10; for ( int x = 0; x < 80; x++ ) { uint8_t ch = m_vram[ row_addr + x ]; uint8_t attr = m_vram[ 0x1000 + row_addr + x ]; uint8_t fg_col = ( attr & 0x80 ) ? 2 : 1; uint8_t font_bits = m_fontram[ ( ( attr & 0x10 ) ? 0x800 : 0 ) + ( ch & 0x7f ) * 16 + char_line ]; /* Check for underline */ if ( ( attr & 0x40 ) && char_line == 9 ) font_bits = 0xFF; /* Check for blink */ if ( ( attr & 0x20 ) && ( m_rtc & 0x10 ) ) font_bits = 0; /* Check for inverse video */ if ( ( ch & 0x80 ) && ! ( attr & 0x10 ) ) font_bits ^= 0xFF; for ( int b = 0; b < 8; b++ ) { p[ x * 8 + b ] = ( font_bits & 0x80 ) ? fg_col : 0; font_bits <<= 1; } } } m_video_timer->adjust( m_screen->time_until_pos( y + 1, 0 ) ); } DRIVER_INIT_MEMBER(osbexec_state,osbexec) { m_fontram_region = machine().memory().region_alloc( "fontram", 0x1000, 1, ENDIANNESS_LITTLE); m_vram_region = machine().memory().region_alloc( "vram", 0x2000, 1, ENDIANNESS_LITTLE ); m_vram = m_vram_region->base(); m_fontram = m_fontram_region->base(); memset( m_fontram, 0x00, 0x1000 ); memset( m_vram, 0x00, 0x2000 ); m_video_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(osbexec_state::osbexec_video_callback),this)); } void osbexec_state::machine_reset() { m_pia0_porta = 0xC0; /* Enable ROM and VRAM on reset */ set_banks(); m_video_timer->adjust( m_screen->time_until_pos( 0, 0 ) ); m_rtc = 0; // D0 cleared on interrupt acknowledge cycle by TTL gates at UC21 and UA18 m_maincpu->set_input_line_vector(0, 0xfe); } static const z80_daisy_config osbexec_daisy_config[] = { { "sio" }, { nullptr } }; MACHINE_CONFIG_START(osbexec_state::osbexec) MCFG_CPU_ADD( "maincpu", Z80, MAIN_CLOCK/6 ) MCFG_CPU_PROGRAM_MAP( osbexec_mem) MCFG_CPU_IO_MAP( osbexec_io) MCFG_Z80_DAISY_CHAIN( osbexec_daisy_config ) MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green()) MCFG_SCREEN_UPDATE_DRIVER(osbexec_state, screen_update) MCFG_SCREEN_RAW_PARAMS( MAIN_CLOCK/2, 768, 0, 640, 260, 0, 240 ) /* May not be correct */ MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD_MONOCHROME_HIGHLIGHT("palette") MCFG_SPEAKER_STANDARD_MONO( "mono" ) MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 ) MCFG_DEVICE_ADD("pia_0", PIA6821, 0) MCFG_PIA_READPA_HANDLER(READ8(osbexec_state, osbexec_pia0_a_r)) MCFG_PIA_READPB_HANDLER(READ8(osbexec_state, osbexec_pia0_b_r)) MCFG_PIA_WRITEPA_HANDLER(WRITE8(osbexec_state, osbexec_pia0_a_w)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(osbexec_state, osbexec_pia0_b_w)) MCFG_PIA_CA2_HANDLER(WRITELINE(osbexec_state, osbexec_pia0_ca2_w)) MCFG_PIA_CB2_HANDLER(WRITELINE(osbexec_state, osbexec_pia0_cb2_w)) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<0>)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<1>)) MCFG_DEVICE_ADD("pia_1", PIA6821, 0) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<2>)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<3>)) MCFG_INPUT_MERGER_ANY_HIGH("mainirq") MCFG_INPUT_MERGER_OUTPUT_HANDLER(INPUTLINE("maincpu", 0)) MCFG_DEVICE_ADD("sio", Z80SIO, MAIN_CLOCK/6) MCFG_Z80SIO_OUT_TXDA_CB(DEVWRITELINE(MODEM_PORT_TAG, rs232_port_device, write_txd)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_DTRA_CB(DEVWRITELINE(MODEM_PORT_TAG, rs232_port_device, write_dtr)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_RTSA_CB(DEVWRITELINE(MODEM_PORT_TAG, rs232_port_device, write_rts)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_TXDB_CB(DEVWRITELINE(PRINTER_PORT_TAG, rs232_port_device, write_txd)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_DTRB_CB(DEVWRITELINE(PRINTER_PORT_TAG, rs232_port_device, write_dtr)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_RTSB_CB(DEVWRITELINE(PRINTER_PORT_TAG, rs232_port_device, write_rts)) MCFG_DEVCB_INVERT MCFG_Z80SIO_OUT_INT_CB(DEVWRITELINE("mainirq", input_merger_device, in_w<4>)) MCFG_DEVICE_ADD("ctc", PIT8253, 0) MCFG_PIT8253_CLK0(MAIN_CLOCK / 13) // divided by 74S161 @ UC25 MCFG_PIT8253_CLK1(MAIN_CLOCK / 13) // divided by 74S161 @ UC25 MCFG_PIT8253_CLK2(MAIN_CLOCK / 12) MCFG_PIT8253_OUT0_HANDLER(WRITELINE(osbexec_state, comm_clk_a_w)) MCFG_PIT8253_OUT1_HANDLER(DEVWRITELINE("sio", z80sio_device, rxtxcb_w)) //MCFG_PIT8253_OUT2_HANDLER(WRITELINE(osbexec_state, spindle_clk_w)) MCFG_RS232_PORT_ADD(MODEM_PORT_TAG, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio", z80sio_device, rxa_w)) MCFG_DEVCB_INVERT MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio", z80sio_device, dcda_w)) MCFG_DEVCB_INVERT MCFG_RS232_DSR_HANDLER(WRITELINE(osbexec_state, modem_dsr_w)) MCFG_RS232_RI_HANDLER(WRITELINE(osbexec_state, modem_ri_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio", z80sio_device, ctsa_w)) MCFG_DEVCB_INVERT MCFG_RS232_PORT_ADD(PRINTER_PORT_TAG, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio", z80sio_device, rxb_w)) MCFG_DEVCB_INVERT MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio", z80sio_device, dcdb_w)) MCFG_DEVCB_INVERT MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio", z80sio_device, ctsb_w)) MCFG_DEVCB_INVERT MCFG_DEVICE_ADD("mb8877", MB8877, MAIN_CLOCK/24) MCFG_WD_FDC_INTRQ_CALLBACK(DEVWRITELINE("pia_1", pia6821_device, cb1_w)) MCFG_FLOPPY_DRIVE_ADD("mb8877:0", osborne2_floppies, "525ssdd", floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD("mb8877:1", osborne2_floppies, "525ssdd", floppy_image_device::default_floppy_formats) /* internal ram */ MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("136K") /* 128KB Main RAM + RAM in ROM bank (8) */ /* software lists */ MCFG_SOFTWARE_LIST_ADD("flop_list", "osborne2") MACHINE_CONFIG_END ROM_START( osbexec ) ROM_REGION(0x2000, "maincpu", 0) ROM_LOAD( "execv12.ud18", 0x0000, 0x2000, CRC(70798c2f) SHA1(2145a72da563bed1d6d455c77e48cc011a5f1153) ) /* Checksum C6B2 */ ROM_END // YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS COMP( 1982, osbexec, 0, 0, osbexec, osbexec, osbexec_state, osbexec, "Osborne", "Executive", MACHINE_NOT_WORKING )