diff options
Diffstat (limited to 'src/mess/drivers/osbexec.c')
-rw-r--r-- | src/mess/drivers/osbexec.c | 581 |
1 files changed, 0 insertions, 581 deletions
diff --git a/src/mess/drivers/osbexec.c b/src/mess/drivers/osbexec.c deleted file mode 100644 index 0318dfa31a0..00000000000 --- a/src/mess/drivers/osbexec.c +++ /dev/null @@ -1,581 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Wilbert Pol -/*************************************************************************** - - Osborne Executive driver file - -***************************************************************************/ - -#include "emu.h" -#include "cpu/z80/z80.h" -#include "cpu/z80/z80daisy.h" -#include "sound/speaker.h" -#include "machine/wd_fdc.h" -#include "machine/6821pia.h" -#include "machine/z80dart.h" -#include "machine/pit8253.h" -#include "machine/ram.h" - - -#define MAIN_CLOCK 23961600 - - -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_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<cpu_device> m_maincpu; - required_device<mb8877_t> m_mb8877; - required_device<ram_device> m_messram; - required_device<pia6821_device> m_pia_0; - required_device<pia6821_device> m_pia_1; - required_device<z80dart_device> m_sio; - required_device<speaker_sound_device> m_speaker; - required_device<floppy_image_device> m_floppy0; - required_device<floppy_image_device> m_floppy1; - - virtual void video_start(); - - UINT32 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 *m_fontram; - UINT8 *m_vram; - UINT8 *m_ram_0000; - UINT8 *m_ram_c000; - UINT8 m_temp_attr; - emu_timer *m_video_timer; - - /* PIA 0 (UD12) */ - UINT8 m_pia0_porta; - UINT8 m_pia0_portb; - int m_pia0_irq_state; - int m_pia0_cb2; /* 60/50 */ - - /* PIA 1 (UD8) */ - int m_pia1_irq_state; - - /* Vblank counter ("RTC") */ - UINT8 m_rtc; - - void set_banks() - { - UINT8 *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(); - } - - void update_irq_state() - { - if ( m_pia0_irq_state || m_pia1_irq_state ) - m_maincpu->set_input_line(0, ASSERT_LINE ); - else - m_maincpu->set_input_line(0, CLEAR_LINE ); - } - 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(); - 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(osbexec_pia0_irq); - DECLARE_WRITE_LINE_MEMBER(osbexec_pia1_irq); -}; - - -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 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 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; -} - - -static ADDRESS_MAP_START( osbexec_mem, AS_PROGRAM, 8, osbexec_state ) - AM_RANGE( 0x0000, 0x1FFF ) AM_READ_BANK("0000") AM_WRITE(osbexec_0000_w ) /* ROM and maybe also banked ram */ - AM_RANGE( 0x2000, 0x3FFF ) AM_RAMBANK("2000") /* Banked RAM */ - AM_RANGE( 0x4000, 0xBFFF ) AM_RAMBANK("4000") /* Banked RAM */ - AM_RANGE( 0xC000, 0xDFFF ) AM_READWRITE(osbexec_c000_r, osbexec_c000_w ) /* Video ram / Banked RAM */ - AM_RANGE( 0xE000, 0xEFFF ) AM_RAMBANK("e000") /* Banked RAM */ - AM_RANGE( 0xF000, 0xFFFF ) AM_RAM /* 4KB of non-banked RAM for system stack etc */ -ADDRESS_MAP_END - - -static ADDRESS_MAP_START( osbexec_io, AS_IO, 8, osbexec_state ) - ADDRESS_MAP_UNMAP_HIGH - AM_RANGE( 0x00, 0x03 ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE( "pia_0", pia6821_device, read, write) /* 6821 PIA @ UD12 */ - /* 0x04 - 0x07 - 8253 @UD1 */ - AM_RANGE( 0x08, 0x0B ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE("mb8877", wd_fdc_t, read, write ) /* MB8877 @ UB17 input clock = 1MHz */ - AM_RANGE( 0x0C, 0x0F ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE("sio", z80sio2_device, ba_cd_r, ba_cd_w ) /* SIO @ UD4 */ - AM_RANGE( 0x10, 0x13 ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE( "pia_1", pia6821_device, read, write) /* 6821 PIA @ UD8 */ - AM_RANGE( 0x14, 0x17 ) AM_MIRROR( 0xff00 ) AM_MASK( 0xff00 ) AM_READ(osbexec_kbd_r ) /* KBD */ - AM_RANGE( 0x18, 0x1b ) AM_MIRROR( 0xff00 ) AM_READ(osbexec_rtc_r ) /* "RTC" @ UE13/UF13 */ - /* ?? - vid ? */ -ADDRESS_MAP_END - - -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() -{ - machine().first_screen()->register_screen_bitmap(m_bitmap); -} - -UINT32 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 = data; - - 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(NULL); - 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::osbexec_pia0_irq) -{ - m_pia0_irq_state = state; - update_irq_state(); -} - - -WRITE_LINE_MEMBER(osbexec_state::osbexec_pia1_irq) -{ - m_pia1_irq_state = state; - update_irq_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 SLOT_INTERFACE_START( osborne2_floppies ) - SLOT_INTERFACE( "525ssdd", FLOPPY_525_SSDD ) -SLOT_INTERFACE_END - - -TIMER_CALLBACK_MEMBER(osbexec_state::osbexec_video_callback) -{ - int y = machine().first_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 row_addr = ( y / 10 ) * 128; - UINT16 *p = &m_bitmap.pix16(y); - UINT8 char_line = y % 10; - - for ( int x = 0; x < 80; x++ ) - { - UINT8 ch = m_vram[ row_addr + x ]; - UINT8 attr = m_vram[ 0x1000 + row_addr + x ]; - UINT8 fg_col = ( attr & 0x80 ) ? 2 : 1; - UINT8 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( machine().first_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( machine().first_screen()->time_until_pos( 0, 0 ) ); - - m_rtc = 0; -} - - -static const z80_daisy_config osbexec_daisy_config[] = -{ - { "sio" }, - { NULL } -}; - - -static MACHINE_CONFIG_START( osbexec, osbexec_state ) - MCFG_CPU_ADD( "maincpu", Z80, MAIN_CLOCK/6 ) - MCFG_CPU_PROGRAM_MAP( osbexec_mem) - MCFG_CPU_IO_MAP( osbexec_io) - MCFG_CPU_CONFIG( osbexec_daisy_config ) - - MCFG_SCREEN_ADD("screen", RASTER) - 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_GREEN_HIGHLIGHT("palette") - - MCFG_SPEAKER_STANDARD_MONO( "mono" ) - MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) - MCFG_SOUND_ROUTE( ALL_OUTPUTS, "mono", 1.00 ) - -// MCFG_PIT8253_ADD("pit", osbexec_pit_config) - - 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(WRITELINE(osbexec_state, osbexec_pia0_irq)) - MCFG_PIA_IRQB_HANDLER(WRITELINE(osbexec_state, osbexec_pia0_irq)) - - MCFG_DEVICE_ADD("pia_1", PIA6821, 0) - MCFG_PIA_IRQA_HANDLER(WRITELINE(osbexec_state, osbexec_pia1_irq)) - MCFG_PIA_IRQB_HANDLER(WRITELINE(osbexec_state, osbexec_pia1_irq)) - - MCFG_Z80SIO2_ADD("sio", MAIN_CLOCK/6, 0, 0, 0, 0) - - 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 INIT COMPANY FULLNAME FLAGS */ -COMP( 1982, osbexec, 0, 0, osbexec, osbexec, osbexec_state, osbexec, "Osborne", "Executive", MACHINE_NOT_WORKING ) |