mirror of
https://github.com/holub/mame
synced 2025-05-22 13:48:55 +03:00
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/***************************************************************************
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Axel AX-20
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27/12/2011 Skeleton driver.
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Hardware description:
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- CPU: I8088
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- FDC: I8272
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- PIT: I8253
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- PIC: I8259
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Also marketed under the Matra brand as MAX-20 ("M" for Matra ?)
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****************************************************************************/
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#include "emu.h"
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#include "cpu/i86/i86.h"
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#include "imagedev/flopdrv.h"
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#include "formats/basicdsk.h"
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class ax20_state : public driver_device
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{
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public:
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ax20_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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,
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m_p_vram(*this, "p_vram"){ }
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required_device<cpu_device> m_maincpu;
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virtual void machine_start();
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UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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required_shared_ptr<UINT8> m_p_vram;
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};
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UINT32 ax20_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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for ( int y = 0; y < 24; y++ )
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{
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for ( int x = 0; x < 80; x++ )
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{
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UINT16 tile = m_p_vram[24 + y * 128 + x ] & 0x7f;
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drawgfx_opaque(bitmap, cliprect, machine().gfx[0], tile, 0, 0, 0, x*8, y*12);
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}
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}
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return 0;
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}
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static ADDRESS_MAP_START(ax20_map, AS_PROGRAM, 8, ax20_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x00000,0x1ffff) AM_RAM
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AM_RANGE(0x20000,0x3ffff) AM_RAM //optional RAM
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AM_RANGE(0xf0400,0xf0fff) AM_RAM AM_SHARE("p_vram")
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AM_RANGE(0xff800,0xfffff) AM_ROM AM_REGION("ipl", 0)
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(ax20_io, AS_IO, 8, ax20_state)
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ADDRESS_MAP_UNMAP_HIGH
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ADDRESS_MAP_END
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/* Input ports */
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static INPUT_PORTS_START( ax20 )
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INPUT_PORTS_END
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void ax20_state::machine_start()
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{
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}
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static const gfx_layout ax20_charlayout =
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{
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8, 12,
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128,
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1,
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{ 0 },
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{ 4*8+7, 4*8+6, 4*8+5, 4*8+4, 4*8+3, 4*8+2, 4*8+1, 4*8+0 },
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{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 8*9, 8*10, 8*11 },
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8*16
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};
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static GFXDECODE_START( ax20 )
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GFXDECODE_ENTRY( "chargen", 0x0000, ax20_charlayout, 0, 1 )
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GFXDECODE_END
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static const floppy_interface ax20_floppy_interface =
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{
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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DEVCB_NULL,
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FLOPPY_STANDARD_5_25_DSDD_40, // TODO
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LEGACY_FLOPPY_OPTIONS_NAME(default),
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NULL,
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NULL
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};
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static MACHINE_CONFIG_START( ax20, ax20_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", I8088, XTAL_14_31818MHz/3)
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MCFG_CPU_PROGRAM_MAP(ax20_map)
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MCFG_CPU_IO_MAP(ax20_io)
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/* video hardware */
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MCFG_SCREEN_ADD("screen", RASTER)
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MCFG_SCREEN_REFRESH_RATE(50)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
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MCFG_SCREEN_UPDATE_DRIVER(ax20_state, screen_update)
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MCFG_SCREEN_SIZE(80*8, 24*12)
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MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 24*12-1)
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MCFG_GFXDECODE(ax20)
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MCFG_PALETTE_LENGTH(2)
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MCFG_PALETTE_INIT(monochrome_green)
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/* Devices */
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MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, ax20_floppy_interface)
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MACHINE_CONFIG_END
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/* ROM definition */
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ROM_START( ax20 )
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ROM_REGION( 0x0800, "ipl", 0 )
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ROM_LOAD( "ax20-s.rom", 0x0000, 0x0800, CRC(f11f95b9) SHA1(59949332dd431fcf8211c2d556e1f49351e90750))
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ROM_REGION( 0x4000, "chargen", 0 )
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ROM_LOAD( "ax20-g.rom", 0x0000, 0x0800, CRC(90bcef80) SHA1(922067fd7316de9e69b9600c793ada5c87197eeb))
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ROM_END
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/* Driver */
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/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
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COMP( 1982, ax20, 0, 0, ax20, ax20, driver_device, 0, "Axel", "AX-20", GAME_NOT_WORKING | GAME_NO_SOUND)
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