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ax20: connect floppy, will read pc disks but requires it's own apparently unavailable msdos to boot (nw)

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cracyc 2015-06-08 11:46:18 -05:00
parent 12879a4044
commit af38621a8b
1 changed files with 34 additions and 13 deletions
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47
src/mess/drivers/ax20.c
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@ -18,8 +18,7 @@
#include "emu.h"
#include "cpu/i86/i86.h"
#include "imagedev/flopdrv.h"
#include "formats/basicdsk.h"
#include "bus/isa/fdc.h"
class ax20_state : public driver_device
{
@ -29,18 +28,37 @@ public:
m_maincpu(*this, "maincpu"),
m_p_vram(*this, "p_vram"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette") { }
m_palette(*this, "palette"),
m_fdc(*this, "fdc") { }
required_device<cpu_device> m_maincpu;
required_shared_ptr<UINT8> m_p_vram;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<i8272a_device> m_fdc;
virtual void machine_start();
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
required_shared_ptr<UINT8> m_p_vram;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
DECLARE_READ8_MEMBER(unk_r);
DECLARE_WRITE8_MEMBER(tc_w);
DECLARE_WRITE8_MEMBER(ctl_w);
};
READ8_MEMBER(ax20_state::unk_r)
{
return 0;
}
WRITE8_MEMBER(ax20_state::tc_w)
{
m_fdc->tc_w((data & 0xf0) == 0xf0);
}
WRITE8_MEMBER(ax20_state::ctl_w)
{
m_fdc->subdevice<floppy_connector>("0")->get_device()->mon_w(!(data & 1));
}
UINT32 ax20_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
@ -68,6 +86,10 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START(ax20_io, AS_IO, 8, ax20_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0xffc0, 0xffc0) AM_WRITE(tc_w)
AM_RANGE(0xffd0, 0xffd0) AM_WRITE(ctl_w)
AM_RANGE(0xffe0, 0xffe0) AM_READ(unk_r)
AM_RANGE(0xff80, 0xff81) AM_DEVICE("fdc", i8272a_device, map)
ADDRESS_MAP_END
/* Input ports */
@ -94,12 +116,9 @@ static GFXDECODE_START( ax20 )
GFXDECODE_ENTRY( "chargen", 0x0000, ax20_charlayout, 0, 1 )
GFXDECODE_END
static const floppy_interface ax20_floppy_interface =
{
FLOPPY_STANDARD_5_25_DSDD_40, // TODO
LEGACY_FLOPPY_OPTIONS_NAME(default),
NULL
};
static SLOT_INTERFACE_START( ax20_floppies )
SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
SLOT_INTERFACE_END
static MACHINE_CONFIG_START( ax20, ax20_state )
/* basic machine hardware */
@ -118,8 +137,10 @@ static MACHINE_CONFIG_START( ax20, ax20_state )
MCFG_GFXDECODE_ADD("gfxdecode", "palette", ax20)
MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
MCFG_I8272A_ADD("fdc", true)
/* Devices */
MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, ax20_floppy_interface)
MCFG_FLOPPY_DRIVE_ADD("fdc:0", ax20_floppies, "525dd", isa8_fdc_device::floppy_formats)
MACHINE_CONFIG_END
/* ROM definition */