diff options
Diffstat (limited to 'src/mame/drivers/osbexec.cpp')
-rw-r--r-- | src/mame/drivers/osbexec.cpp | 621 |
1 files changed, 0 insertions, 621 deletions
diff --git a/src/mame/drivers/osbexec.cpp b/src/mame/drivers/osbexec.cpp deleted file mode 100644 index 7e35a8fd47f..00000000000 --- a/src/mame/drivers/osbexec.cpp +++ /dev/null @@ -1,621 +0,0 @@ -// 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 "imagedev/floppy.h" -#include "machine/z80daisy.h" -#include "machine/6821pia.h" -#include "machine/input_merger.h" -#include "machine/pit8253.h" -#include "machine/ram.h" -#include "machine/ripple_counter.h" -#include "machine/wd_fdc.h" -#include "machine/z80sio.h" -#include "sound/spkrdev.h" - -#include "emupal.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(*this, "pia_%u", 0U) - , m_rtc(*this, "rtc") - , m_sio(*this, "sio") - , m_speaker(*this, "speaker") - , m_floppy(*this, "mb8877:%u:525ssdd", 0U) - , m_kbd_row(*this, "ROW%u", 0U) - { } - - void osbexec(machine_config &config); - - void init_osbexec(); - -private: - required_device<z80_device> m_maincpu; - required_device<screen_device> m_screen; - required_device<mb8877_device> m_mb8877; - required_device<ram_device> m_messram; - required_device_array<pia6821_device, 2> m_pia; - required_device<ripple_counter_device> m_rtc; - required_device<z80sio_device> m_sio; - required_device<speaker_sound_device> m_speaker; - required_device_array<floppy_image_device, 2> m_floppy; - required_ioport_array<8> m_kbd_row; - - virtual void video_start() override; - - uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); - - bitmap_ind16 m_bitmap; - - std::unique_ptr<uint8_t[]> m_fontram; - std::unique_ptr<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) */ - - 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.get(); - } - - void osbexec_0000_w(offs_t offset, uint8_t data); - uint8_t osbexec_c000_r(offs_t offset); - void osbexec_c000_w(offs_t offset, uint8_t data); - uint8_t osbexec_kbd_r(offs_t offset); - uint8_t osbexec_rtc_r(); - virtual void machine_reset() override; - TIMER_CALLBACK_MEMBER(osbexec_video_callback); - uint8_t osbexec_pia0_a_r(); - void osbexec_pia0_a_w(uint8_t data); - uint8_t osbexec_pia0_b_r(); - void osbexec_pia0_b_w(uint8_t data); - 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_io(address_map &map); - void osbexec_mem(address_map &map); -}; - - -void osbexec_state::osbexec_0000_w(offs_t offset, uint8_t data) -{ - /* 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; - } -} - - -uint8_t osbexec_state::osbexec_c000_r(offs_t offset) -{ - uint8_t data = m_ram_c000[offset]; - - if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 ) - { - m_temp_attr = m_ram_c000[ 0x1000 + offset ]; - } - - return data; -} - - -void osbexec_state::osbexec_c000_w(offs_t offset, uint8_t data) -{ - m_ram_c000[offset] = data; - - if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 ) - { - m_ram_c000[ 0x1000 + offset ] = m_temp_attr; - } -} - - -uint8_t osbexec_state::osbexec_kbd_r(offs_t offset) -{ - uint8_t data = 0xFF; - - for (int j = 0; j < 8; j++) - if (BIT(offset, j + 8)) - data &= m_kbd_row[j]->read(); - - return data; -} - - -uint8_t osbexec_state::osbexec_rtc_r() -{ - // 74LS244 buffer @ UF13 - return m_rtc->count(); -} - - -void osbexec_state::osbexec_mem(address_map &map) -{ - map(0x0000, 0x1FFF).bankr("0000").w(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(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(FUNC(osbexec_state::osbexec_kbd_r)); /* KBD */ - map(0x18, 0x1b).mirror(0xff00).r(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_CHAR(21) - PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_CHAR(25) - PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_CHAR(20) - PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_CHAR(18) - PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_CHAR(5) - PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_CHAR(23) - PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_CHAR(17) - - PORT_START("ROW3") - PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_CHAR(11) - PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_CHAR(10) - PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_CHAR(8) - PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_CHAR(7) - PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_CHAR(6) - PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_CHAR(4) - PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_CHAR(19) - PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_CHAR(1) - - 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_CHAR(14) - PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(2) - PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_CHAR(22) - PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_CHAR(3) - PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_CHAR(24) - PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_CHAR(26) - - 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_CHAR(15) - PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_CHAR(16) - 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_CHAR(12) - 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 (?) -*/ - -uint8_t osbexec_state::osbexec_pia0_a_r() -{ - return m_pia0_porta; -} - - -void osbexec_state::osbexec_pia0_a_w(uint8_t data) -{ - //logerror("osbexec_pia0_a_w: %02x\n", data ); - - m_pia0_porta = data; - - set_banks(); -} - - -uint8_t osbexec_state::osbexec_pia0_b_r() -{ - return m_pia0_portb; -} - - -void osbexec_state::osbexec_pia0_b_w(uint8_t data) -{ - 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_floppy[1].target()); - m_floppy[1]->mon_w(0); - break; - case 0x04: - m_mb8877->set_floppy(m_floppy[0].target()); - m_floppy[0]->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) -{ - if (state) - m_pia0_portb |= 0x40; - else - m_pia0_portb &= 0xbf; -} - - -WRITE_LINE_MEMBER(osbexec_state::modem_ri_w) -{ - if (state) - m_pia0_portb |= 0x80; - else - m_pia0_portb &= 0x7f; -} - - -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); -} - - -/* - * 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(); - - if ( y < 240 ) - { - uint16_t row_addr = ( y / 10 ) * 128; - uint16_t *const p = &m_bitmap.pix(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 (BIT(attr, 6) && char_line == 9) - font_bits = 0xFF; - - /* Check for blink */ - if (BIT(attr, 5) && BIT(m_rtc->count(), 4)) - font_bits = 0; - - /* Check for inverse video */ - if (BIT(ch, 7) && !BIT(attr, 4)) - 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 ) ); -} - - -void osbexec_state::init_osbexec() -{ - m_vram = make_unique_clear<uint8_t[]>(0x2000); - m_fontram = make_unique_clear<uint8_t[]>(0x1000); - - 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 ) ); - - // D0 cleared on interrupt acknowledge cycle by TTL gates at UC21 and UA18 - m_maincpu->set_input_line_vector(0, 0xfe); // Z80 -} - - -static const z80_daisy_config osbexec_daisy_config[] = -{ - { "sio" }, - { nullptr } -}; - - -void osbexec_state::osbexec(machine_config &config) -{ - Z80(config, m_maincpu, MAIN_CLOCK/6); - m_maincpu->set_addrmap(AS_PROGRAM, &osbexec_state::osbexec_mem); - m_maincpu->set_addrmap(AS_IO, &osbexec_state::osbexec_io); - m_maincpu->set_daisy_config(osbexec_daisy_config); - - SCREEN(config, m_screen, SCREEN_TYPE_RASTER); - m_screen->set_color(rgb_t::green()); - m_screen->set_screen_update(FUNC(osbexec_state::screen_update)); - m_screen->set_raw(MAIN_CLOCK/2, 768, 0, 640, 260, 0, 240); // May not be correct - m_screen->set_palette("palette"); - m_screen->screen_vblank().set(m_pia[0], FUNC(pia6821_device::cb1_w)); - m_screen->screen_vblank().append(m_rtc, FUNC(ripple_counter_device::clock_w)).invert(); - - PALETTE(config, "palette", palette_device::MONOCHROME_HIGHLIGHT); - - SPEAKER(config, "mono").front_center(); - SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 1.00); - - PIA6821(config, m_pia[0], 0); - m_pia[0]->readpa_handler().set(FUNC(osbexec_state::osbexec_pia0_a_r)); - m_pia[0]->readpb_handler().set(FUNC(osbexec_state::osbexec_pia0_b_r)); - m_pia[0]->writepa_handler().set(FUNC(osbexec_state::osbexec_pia0_a_w)); - m_pia[0]->writepb_handler().set(FUNC(osbexec_state::osbexec_pia0_b_w)); - m_pia[0]->ca2_handler().set(FUNC(osbexec_state::osbexec_pia0_ca2_w)); - m_pia[0]->cb2_handler().set(FUNC(osbexec_state::osbexec_pia0_cb2_w)); - m_pia[0]->irqa_handler().set("mainirq", FUNC(input_merger_device::in_w<0>)); - m_pia[0]->irqb_handler().set("mainirq", FUNC(input_merger_device::in_w<1>)); - - PIA6821(config, m_pia[1], 0); - m_pia[1]->irqa_handler().set("mainirq", FUNC(input_merger_device::in_w<2>)); - m_pia[1]->irqb_handler().set("mainirq", FUNC(input_merger_device::in_w<3>)); - - INPUT_MERGER_ANY_HIGH(config, "mainirq").output_handler().set_inputline(m_maincpu, 0); - - RIPPLE_COUNTER(config, m_rtc); // 74LS393 @ UE13 - m_rtc->set_stages(8); // two halves cascaded - - Z80SIO(config, m_sio, MAIN_CLOCK/6); - m_sio->out_txda_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_txd)); - m_sio->out_dtra_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_dtr)); - m_sio->out_rtsa_callback().set(MODEM_PORT_TAG, FUNC(rs232_port_device::write_rts)); - m_sio->out_txdb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_txd)); - m_sio->out_dtrb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_dtr)); - m_sio->out_rtsb_callback().set(PRINTER_PORT_TAG, FUNC(rs232_port_device::write_rts)); - m_sio->out_int_callback().set("mainirq", FUNC(input_merger_device::in_w<4>)); - - pit8253_device &ctc(PIT8253(config, "ctc", 0)); - ctc.set_clk<0>(MAIN_CLOCK / 13); // divided by 74S161 @ UC25 - ctc.set_clk<1>(MAIN_CLOCK / 13); // divided by 74S161 @ UC25 - ctc.set_clk<2>(MAIN_CLOCK / 12); - ctc.out_handler<0>().set(FUNC(osbexec_state::comm_clk_a_w)); - ctc.out_handler<0>().append(MODEM_PORT_TAG, FUNC(rs232_port_device::write_etc)); - ctc.out_handler<1>().set(m_sio, FUNC(z80sio_device::rxtxcb_w)); - //ctc.out_handler<2>().set(FUNC(osbexec_state::spindle_clk_w)); - - rs232_port_device &modem_port(RS232_PORT(config, MODEM_PORT_TAG, default_rs232_devices, nullptr)); - modem_port.rxd_handler().set(m_sio, FUNC(z80sio_device::rxa_w)); - modem_port.dcd_handler().set(m_sio, FUNC(z80sio_device::dcda_w)); - modem_port.dsr_handler().set(FUNC(osbexec_state::modem_dsr_w)); - modem_port.ri_handler().set(FUNC(osbexec_state::modem_ri_w)); - modem_port.cts_handler().set(m_sio, FUNC(z80sio_device::ctsa_w)); - modem_port.txc_handler().set(FUNC(osbexec_state::modem_txclk_w)); - modem_port.rxc_handler().set(FUNC(osbexec_state::modem_rxclk_w)); - - rs232_port_device &printer_port(RS232_PORT(config, PRINTER_PORT_TAG, default_rs232_devices, nullptr)); - printer_port.rxd_handler().set(m_sio, FUNC(z80sio_device::rxb_w)); - printer_port.dcd_handler().set(m_sio, FUNC(z80sio_device::dcdb_w)); - printer_port.cts_handler().set(m_sio, FUNC(z80sio_device::ctsb_w)); - - MB8877(config, m_mb8877, MAIN_CLOCK/24); - m_mb8877->intrq_wr_callback().set(m_pia[1], FUNC(pia6821_device::cb1_w)); - FLOPPY_CONNECTOR(config, "mb8877:0", osborne2_floppies, "525ssdd", floppy_image_device::default_mfm_floppy_formats); - FLOPPY_CONNECTOR(config, "mb8877:1", osborne2_floppies, "525ssdd", floppy_image_device::default_mfm_floppy_formats); - - /* internal ram */ - RAM(config, RAM_TAG).set_default_size("136K"); /* 128KB Main RAM + RAM in ROM bank (8) */ - - /* software lists */ - SOFTWARE_LIST(config, "flop_list").set_original("osborne2"); -} - - -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 CLASS INIT COMPANY FULLNAME FLAGS -COMP( 1982, osbexec, 0, 0, osbexec, osbexec, osbexec_state, init_osbexec, "Osborne", "Executive", MACHINE_NOT_WORKING ) |