/***************************************************************************
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();
DECLARE_PALETTE_INIT(osbexec);
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
PALETTE_INIT_MEMBER(osbexec_state, osbexec)
{
palette.set_pen_color( 0, 0, 0, 0 ); /* Black */
palette.set_pen_color( 1, 0, 255, 0 ); /* Full */
palette.set_pen_color( 2, 0, 128, 0 ); /* Dimmed */
}
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 LEGACY_FLOPPY_OPTIONS_START(osbexec )
LEGACY_FLOPPY_OPTION( osd, "img", "Osborne single density", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
TRACKS([40])
SECTORS([10])
SECTOR_LENGTH([256])
FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTION( odd, "img", "Osborne double density", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
TRACKS([40])
SECTORS([5])
SECTOR_LENGTH([1024])
FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTION( ibm, "img", "IBM Personal Computer", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
TRACKS([40])
SECTORS([8])
SECTOR_LENGTH([512])
FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTION( xerox, "img", "Xerox 820 Computer", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
TRACKS([40])
SECTORS([18])
SECTOR_LENGTH([128])
FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTION( dec, "img", "DEC 1820 double density", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
TRACKS([40])
SECTORS([9])
SECTOR_LENGTH([512])
FIRST_SECTOR_ID([1]))
LEGACY_FLOPPY_OPTIONS_END
*/
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 ) ? 1 : 2;
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( "palette", 3 )
MCFG_PALETTE_INIT_OWNER(osbexec_state, osbexec)
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", MB8877x, 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", GAME_NOT_WORKING )