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-rw-r--r--src/mame/drivers/osbexec.cpp581
1 files changed, 581 insertions, 0 deletions
diff --git a/src/mame/drivers/osbexec.cpp b/src/mame/drivers/osbexec.cpp
new file mode 100644
index 00000000000..848cf8aaadc
--- /dev/null
+++ b/src/mame/drivers/osbexec.cpp
@@ -0,0 +1,581 @@
+// 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"
+#include "softlist.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 )