mirror of
https://github.com/holub/mame
synced 2025-10-04 16:34:53 +03:00
655 lines
21 KiB
C
655 lines
21 KiB
C
/***************************************************************************
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Osborne Executive driver file
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***************************************************************************/
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#include "emu.h"
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#include "cpu/z80/z80.h"
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#include "cpu/z80/z80daisy.h"
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#include "imagedev/flopdrv.h"
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#include "formats/basicdsk.h"
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#include "sound/speaker.h"
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#include "machine/wd17xx.h"
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#include "machine/6821pia.h"
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#include "machine/z80dart.h"
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#include "machine/pit8253.h"
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#include "machine/ram.h"
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#define MAIN_CLOCK 23961600
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class osbexec_state : public driver_device
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{
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public:
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osbexec_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag),
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m_maincpu( *this, "maincpu" ),
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m_mb8877( *this, "mb8877" ),
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m_messram( *this, RAM_TAG ),
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m_pia_0( *this, "pia_0" ),
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m_pia_1( *this, "pia_1" ),
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m_sio( *this, "sio" ),
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m_speaker( *this, "speaker" )
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{ }
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required_device<cpu_device> m_maincpu;
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required_device<mb8877_device> m_mb8877;
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required_device<ram_device> m_messram;
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required_device<pia6821_device> m_pia_0;
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required_device<pia6821_device> m_pia_1;
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required_device<z80dart_device> m_sio;
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required_device<speaker_sound_device> m_speaker;
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virtual void video_start();
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UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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bitmap_ind16 m_bitmap;
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memory_region *m_fontram_region;
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memory_region *m_vram_region;
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UINT8 *m_fontram;
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UINT8 *m_vram;
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UINT8 *m_ram_0000;
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UINT8 *m_ram_c000;
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UINT8 m_temp_attr;
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emu_timer *m_video_timer;
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/* PIA 0 (UD12) */
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UINT8 m_pia0_porta;
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UINT8 m_pia0_portb;
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int m_pia0_irq_state;
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int m_pia0_cb2; /* 60/50 */
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/* PIA 1 (UD8) */
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int m_pia1_irq_state;
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/* Vblank counter ("RTC") */
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UINT8 m_rtc;
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void set_banks(running_machine &machine)
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{
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UINT8 *ram_ptr = m_messram->pointer();
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m_ram_0000 = ram_ptr;
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if ( m_pia0_porta & 0x01 )
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m_ram_0000 += 0x10000;
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membank( "0000" )->set_base( m_ram_0000 + 0x0000 );
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membank( "2000" )->set_base( m_ram_0000 + 0x2000 );
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membank( "4000" )->set_base( m_ram_0000 + 0x4000 );
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m_ram_c000 = m_ram_0000 + 0xc000;
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membank( "e000" )->set_base( m_ram_0000 + 0xe000 );
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if ( m_pia0_porta & 0x80 )
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{
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membank( "0000" )->set_base( memregion("maincpu")->base());
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/* When BIOS is enabled 2000-3FFF is set to the "ROM RAM" */
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membank( "2000" )->set_base( ram_ptr + 0x20000 );
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}
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if ( m_pia0_porta & 0x40 )
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m_ram_c000 = m_vram_region->base();
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}
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void update_irq_state(running_machine &machine)
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{
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if ( m_pia0_irq_state || m_pia1_irq_state )
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m_maincpu->set_input_line(0, ASSERT_LINE );
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else
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m_maincpu->set_input_line(0, CLEAR_LINE );
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}
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DECLARE_WRITE8_MEMBER(osbexec_0000_w);
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DECLARE_READ8_MEMBER(osbexec_c000_r);
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DECLARE_WRITE8_MEMBER(osbexec_c000_w);
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DECLARE_READ8_MEMBER(osbexec_kbd_r);
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DECLARE_READ8_MEMBER(osbexec_rtc_r);
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DECLARE_DRIVER_INIT(osbexec);
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virtual void machine_reset();
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virtual void palette_init();
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TIMER_CALLBACK_MEMBER(osbexec_video_callback);
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DECLARE_READ8_MEMBER(osbexec_pia0_a_r);
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DECLARE_WRITE8_MEMBER(osbexec_pia0_a_w);
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DECLARE_READ8_MEMBER(osbexec_pia0_b_r);
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DECLARE_WRITE8_MEMBER(osbexec_pia0_b_w);
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DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_ca2_w);
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DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_cb2_w);
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DECLARE_WRITE_LINE_MEMBER(osbexec_pia0_irq);
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DECLARE_WRITE_LINE_MEMBER(osbexec_pia1_irq);
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};
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WRITE8_MEMBER(osbexec_state::osbexec_0000_w)
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{
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/* Font RAM writing is enabled when ROM bank is enabled */
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if ( m_pia0_porta & 0x80 )
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{
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if ( offset < 0x1000 )
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m_fontram[ offset ] = data;
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}
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else
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{
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m_ram_0000[ offset ] = data;
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}
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}
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READ8_MEMBER(osbexec_state::osbexec_c000_r)
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{
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UINT8 data = m_ram_c000[offset];
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if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 )
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{
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m_temp_attr = m_ram_c000[ 0x1000 + offset ];
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}
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return data;
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}
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WRITE8_MEMBER(osbexec_state::osbexec_c000_w)
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{
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m_ram_c000[offset] = data;
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if ( ( m_pia0_porta & 0x40 ) && offset < 0x1000 )
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{
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m_ram_c000[ 0x1000 + offset ] = m_temp_attr;
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}
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}
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READ8_MEMBER(osbexec_state::osbexec_kbd_r)
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{
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UINT8 data = 0xFF;
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if ( offset & 0x0100 )
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data &= ioport( "ROW0" )->read();
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if ( offset & 0x0200 )
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data &= ioport( "ROW1" )->read();
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if ( offset & 0x0400 )
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data &= ioport( "ROW2" )->read();
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if ( offset & 0x0800 )
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data &= ioport( "ROW3" )->read();
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if ( offset & 0x1000 )
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data &= ioport( "ROW4" )->read();
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if ( offset & 0x2000 )
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data &= ioport( "ROW5" )->read();
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if ( offset & 0x4000 )
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data &= ioport( "ROW6" )->read();
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if ( offset & 0x8000 )
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data &= ioport( "ROW7" )->read();
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return data;
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}
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READ8_MEMBER(osbexec_state::osbexec_rtc_r)
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{
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return m_rtc;
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}
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static ADDRESS_MAP_START( osbexec_mem, AS_PROGRAM, 8, osbexec_state )
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AM_RANGE( 0x0000, 0x1FFF ) AM_READ_BANK("0000") AM_WRITE(osbexec_0000_w ) /* ROM and maybe also banked ram */
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AM_RANGE( 0x2000, 0x3FFF ) AM_RAMBANK("2000") /* Banked RAM */
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AM_RANGE( 0x4000, 0xBFFF ) AM_RAMBANK("4000") /* Banked RAM */
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AM_RANGE( 0xC000, 0xDFFF ) AM_READWRITE(osbexec_c000_r, osbexec_c000_w ) /* Video ram / Banked RAM */
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AM_RANGE( 0xE000, 0xEFFF ) AM_RAMBANK("e000") /* Banked RAM */
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AM_RANGE( 0xF000, 0xFFFF ) AM_RAM /* 4KB of non-banked RAM for system stack etc */
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ADDRESS_MAP_END
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static ADDRESS_MAP_START( osbexec_io, AS_IO, 8, osbexec_state )
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE( 0x00, 0x03 ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE( "pia_0", pia6821_device, read, write) /* 6821 PIA @ UD12 */
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/* 0x04 - 0x07 - 8253 @UD1 */
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AM_RANGE( 0x08, 0x0B ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE_LEGACY("mb8877", wd17xx_r, wd17xx_w ) /* MB8877 @ UB17 input clock = 1MHz */
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AM_RANGE( 0x0C, 0x0F ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE("sio", z80sio2_device, ba_cd_r, ba_cd_w ) /* SIO @ UD4 */
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AM_RANGE( 0x10, 0x13 ) AM_MIRROR( 0xff00 ) AM_DEVREADWRITE( "pia_1", pia6821_device, read, write) /* 6821 PIA @ UD8 */
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AM_RANGE( 0x14, 0x17 ) AM_MIRROR( 0xff00 ) AM_MASK( 0xff00 ) AM_READ(osbexec_kbd_r ) /* KBD */
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AM_RANGE( 0x18, 0x1b ) AM_MIRROR( 0xff00 ) AM_READ(osbexec_rtc_r ) /* "RTC" @ UE13/UF13 */
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/* ?? - vid ? */
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ADDRESS_MAP_END
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static INPUT_PORTS_START( osbexec )
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PORT_START("ROW0")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('[') PORT_CHAR(']')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('\'') PORT_CHAR('"')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
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PORT_START("ROW1")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
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PORT_START("ROW2")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
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PORT_START("ROW3")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
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PORT_START("ROW4")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
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PORT_START("ROW5")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
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PORT_START("ROW6")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('\\') PORT_CHAR('|')
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
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PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
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PORT_START("ROW7")
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PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_DIPNAME( 0x08, 0, "Alpha Lock" ) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
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PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x00, DEF_STR( On ) )
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PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
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INPUT_PORTS_END
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void osbexec_state::palette_init()
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{
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palette_set_color_rgb( machine(), 0, 0, 0, 0 ); /* Black */
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palette_set_color_rgb( machine(), 1, 0, 255, 0 ); /* Full */
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palette_set_color_rgb( machine(), 2, 0, 128, 0 ); /* Dimmed */
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}
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void osbexec_state::video_start()
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{
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machine().primary_screen->register_screen_bitmap(m_bitmap);
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}
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UINT32 osbexec_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect);
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return 0;
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}
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/*
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UD12 - 6821 PIA
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Port A:
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PA7 - ROM BANK ENA
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PA6 - VRAM BANK ENA
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PA5 - BANK6ENA
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PA4 - BANK5ENA
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PA3 - BANK4ENA
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PA2 - BANK3ENA
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PA1 - BANK2ENA
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PA0 - BANK1ENA
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CA1 - DMA IRQ
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CA2 - KBD STB (i/o)
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Port B:
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PB7 - MODEM RI (input)
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PB6 - MODEM DSR (input)
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PB5 - TXC SEL
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PB4 - RXC SEL
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PB3 - speaker
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PB2 - DSEL2
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PB1 - DSEL1
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PB0 - DDEN
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CB1 - VBlank (input)
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CB2 - 60/50 (?)
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*/
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|
|
|
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(machine());
|
|
}
|
|
|
|
|
|
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:
|
|
wd17xx_set_drive( m_mb8877, 1 );
|
|
break;
|
|
case 0x04:
|
|
wd17xx_set_drive( m_mb8877, 0 );
|
|
break;
|
|
}
|
|
|
|
wd17xx_dden_w( m_mb8877, ( 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(machine());
|
|
}
|
|
|
|
|
|
WRITE_LINE_MEMBER(osbexec_state::osbexec_pia1_irq)
|
|
{
|
|
m_pia1_irq_state = state;
|
|
update_irq_state(machine());
|
|
}
|
|
|
|
|
|
static Z80SIO_INTERFACE( osbexec_sio_config )
|
|
{
|
|
0, 0, 0, 0,
|
|
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
|
|
DEVCB_NULL, //DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0)
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL
|
|
};
|
|
|
|
|
|
#if 0
|
|
static const wd17xx_interface osbexec_wd17xx_interface =
|
|
{
|
|
DEVCB_NULL,
|
|
DEVCB_DEVICE_LINE_MEMBER( "pia1", pia6821_device, cb1_w ),
|
|
DEVCB_NULL,
|
|
{ FLOPPY_0, FLOPPY_1, NULL, NULL}
|
|
};
|
|
#endif
|
|
|
|
|
|
/*
|
|
* 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 const floppy_interface osbexec_floppy_interface =
|
|
{
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
DEVCB_NULL,
|
|
FLOPPY_STANDARD_5_25_SSDD_40,
|
|
LEGACY_FLOPPY_OPTIONS_NAME(osbexec),
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
|
|
TIMER_CALLBACK_MEMBER(osbexec_state::osbexec_video_callback)
|
|
{
|
|
int y = machine().primary_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().primary_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( machine() );
|
|
|
|
m_video_timer->adjust( machine().primary_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_PALETTE_LENGTH( 3 )
|
|
|
|
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, osbexec_sio_config )
|
|
|
|
MCFG_MB8877_ADD("mb8877", default_wd17xx_interface_2_drives )
|
|
|
|
MCFG_LEGACY_FLOPPY_2_DRIVES_ADD(osbexec_floppy_interface)
|
|
|
|
/* internal ram */
|
|
MCFG_RAM_ADD(RAM_TAG)
|
|
MCFG_RAM_DEFAULT_SIZE("136K") /* 128KB Main RAM + RAM in ROM bank (8) */
|
|
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 )
|