mirror of
https://github.com/holub/mame
synced 2025-05-05 13:54:42 +03:00
(MESS) c1581: Modernized floppy, WIP. (nw)
This commit is contained in:
Curt Coder
parent
0e904825d4
commit
e759cbccab
@ -935,6 +935,32 @@ READ8_MEMBER( mos6526_device::read )
|
||||
return data;
|
||||
}
|
||||
|
||||
READ8_MEMBER( mos8520_device::read )
|
||||
{
|
||||
UINT8 data = 0;
|
||||
|
||||
switch (offset)
|
||||
{
|
||||
case TOD_MIN:
|
||||
if (!m_tod_latched)
|
||||
{
|
||||
m_tod_latched = true;
|
||||
m_tod_latch = m_tod;
|
||||
}
|
||||
|
||||
data = read_tod(2);
|
||||
break;
|
||||
|
||||
case TOD_HR:
|
||||
data = read_tod(3);
|
||||
break;
|
||||
|
||||
default:
|
||||
data = mos6526_device::read(space, offset);
|
||||
}
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
//-------------------------------------------------
|
||||
// write -
|
||||
@ -1070,6 +1096,25 @@ WRITE8_MEMBER( mos6526_device::write )
|
||||
}
|
||||
}
|
||||
|
||||
WRITE8_MEMBER( mos8520_device::write )
|
||||
{
|
||||
switch (offset)
|
||||
{
|
||||
default:
|
||||
mos6526_device::write(space, offset, data);
|
||||
break;
|
||||
|
||||
case TOD_MIN:
|
||||
m_tod_stopped = true;
|
||||
write_tod(2, data);
|
||||
break;
|
||||
|
||||
case TOD_HR:
|
||||
write_tod(3, data);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// pa_r - port A read
|
||||
|
||||
@ -247,8 +247,8 @@ class mos8520_device : public mos6526_device
|
||||
public:
|
||||
mos8520_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
|
||||
|
||||
//DECLARE_READ8_MEMBER( read );
|
||||
//DECLARE_WRITE8_MEMBER( write );
|
||||
DECLARE_READ8_MEMBER( read );
|
||||
DECLARE_WRITE8_MEMBER( write );
|
||||
|
||||
protected:
|
||||
inline void clock_tod();
|
||||
|
||||
@ -1,32 +1,69 @@
|
||||
/***************************************************************************
|
||||
|
||||
Copyright Olivier Galibert
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in
|
||||
the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
* Neither the name 'MAME' nor the names of its contributors may be
|
||||
used to endorse or promote products derived from this software
|
||||
without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
|
||||
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
|
||||
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
||||
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
****************************************************************************/
|
||||
|
||||
/*********************************************************************
|
||||
|
||||
formats/d81_dsk.c
|
||||
|
||||
Floppy format code for Commodore 1581 disk images
|
||||
Commodore 1581 disk image format
|
||||
|
||||
*********************************************************************/
|
||||
|
||||
#include "basicdsk.h"
|
||||
#include "d81_dsk.h"
|
||||
|
||||
/***************************************************************************
|
||||
PARAMETERS
|
||||
***************************************************************************/
|
||||
|
||||
#define D81_SIZE 819200
|
||||
|
||||
/***************************************************************************
|
||||
IMPLEMENTATION
|
||||
***************************************************************************/
|
||||
|
||||
/*-------------------------------------------------
|
||||
d81_translate_offset - translates the
|
||||
physical offset to a logical offset within
|
||||
the disk image
|
||||
-------------------------------------------------*/
|
||||
|
||||
/*
|
||||
|
||||
PER TRACK ORGANIZATION:
|
||||
|
||||
Hex 4E written as a gap, with 10 sectors of data, with full gaps written for motor speed variation.
|
||||
|
||||
PER SECTOR ORGANIZATION:
|
||||
|
||||
MFM Encoding
|
||||
12 Bytes of Hex 00
|
||||
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
|
||||
1 Byte of Hex FE (ID Address Mark)
|
||||
1 Byte (Track Number)
|
||||
1 Byte (Side Number)
|
||||
1 Byte (Sector Number)
|
||||
1 Byte (Sector Length, 02 for 512 Byte Sectors)
|
||||
2 Bytes CRC (Cyclic Redundancy Check)
|
||||
22 Bytes of Hex 22
|
||||
12 Bytes of Hex 00
|
||||
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
|
||||
1 Byte of Hex FB (Data Address Mark)
|
||||
512 Bytes of Data
|
||||
2 Bytes of CRC (Cyclic Redundancy Check)
|
||||
38 Bytes of Hex 4E
|
||||
|
||||
file offset | CBM logical | drive physical | specials
|
||||
decimal sedecimal | track/sector | cyl head sec offs |
|
||||
------------------+--------------+-------------------+--------------
|
||||
@ -67,65 +104,107 @@
|
||||
|
||||
*/
|
||||
|
||||
static UINT64 d81_translate_offset(floppy_image_legacy *floppy, const struct basicdsk_geometry *geom, int track, int head, int sector)
|
||||
{
|
||||
UINT64 offset = (track * 20) + (!head * 10) + sector;
|
||||
#include "emu.h"
|
||||
#include "formats/d81_dsk.h"
|
||||
|
||||
return offset;
|
||||
d81_format::d81_format() : wd177x_format(formats)
|
||||
{
|
||||
}
|
||||
|
||||
/*-------------------------------------------------
|
||||
FLOPPY_IDENTIFY( d81_dsk_identify )
|
||||
-------------------------------------------------*/
|
||||
|
||||
FLOPPY_IDENTIFY( d81_dsk_identify )
|
||||
const char *d81_format::name() const
|
||||
{
|
||||
*vote = (floppy_image_size(floppy) == D81_SIZE) ? 100 : 0;
|
||||
|
||||
return FLOPPY_ERROR_SUCCESS;
|
||||
return "d81";
|
||||
}
|
||||
|
||||
/*-------------------------------------------------
|
||||
FLOPPY_CONSTRUCT( d81_dsk_construct )
|
||||
-------------------------------------------------*/
|
||||
|
||||
/*
|
||||
PER TRACK ORGANIZATION:
|
||||
|
||||
Hex 4E written as a gap, with 10 sectors of data, with full gaps written for motor speed variation.
|
||||
|
||||
PER SECTOR ORGANIZATION:
|
||||
|
||||
MFM Encoding
|
||||
12 Bytes of Hex 00
|
||||
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
|
||||
1 Byte of Hex FE (ID Address Mark)
|
||||
1 Byte (Track Number)
|
||||
1 Byte (Side Number)
|
||||
1 Byte (Sector Number)
|
||||
1 Byte (Sector Length, 02 for 512 Byte Sectors)
|
||||
2 Bytes CRC (Cyclic Redundancy Check)
|
||||
22 Bytes of Hex 22
|
||||
12 Bytes of Hex 00
|
||||
3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
|
||||
1 Byte of Hex FB (Data Address Mark)
|
||||
512 Bytes of Data
|
||||
2 Bytes of CRC (Cyclic Redundancy Check)
|
||||
38 Bytes of Hex 4E
|
||||
*/
|
||||
|
||||
FLOPPY_CONSTRUCT( d81_dsk_construct )
|
||||
const char *d81_format::description() const
|
||||
{
|
||||
struct basicdsk_geometry geometry;
|
||||
|
||||
memset(&geometry, 0, sizeof(geometry));
|
||||
|
||||
geometry.heads = 2;
|
||||
geometry.first_sector_id = 1;
|
||||
geometry.sector_length = 512;
|
||||
geometry.tracks = 80;
|
||||
geometry.sectors = 10;
|
||||
geometry.translate_offset = d81_translate_offset;
|
||||
|
||||
return basicdsk_construct(floppy, &geometry);
|
||||
return "Commodore 1581 disk image";
|
||||
}
|
||||
|
||||
const char *d81_format::extensions() const
|
||||
{
|
||||
return "d81";
|
||||
}
|
||||
|
||||
// Unverified gap sizes
|
||||
const d81_format::format d81_format::formats[] = {
|
||||
{
|
||||
floppy_image::FF_35, floppy_image::DSDD,
|
||||
2000, 10, 80, 2, 512, {}, 1, {}, 32, 22, 35
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
bool d81_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
|
||||
{
|
||||
int type = find_size(io, form_factor);
|
||||
if(type == -1)
|
||||
return false;
|
||||
|
||||
const format &f = formats[type];
|
||||
|
||||
floppy_image_format_t::desc_e desc[] = {
|
||||
/* 00 */ { MFM, 0x4e, f.gap_1 },
|
||||
/* 01 */ { SECTOR_LOOP_START, 0, f.sector_count-1 },
|
||||
/* 02 */ { MFM, 0x00, 12 },
|
||||
/* 03 */ { CRC_CCITT_START, 1 },
|
||||
/* 04 */ { RAW, 0x4489, 3 },
|
||||
/* 05 */ { MFM, 0xfe, 1 },
|
||||
/* 06 */ { TRACK_ID },
|
||||
/* 07 */ { HEAD_ID_SWAP },
|
||||
/* 08 */ { SECTOR_ID },
|
||||
/* 09 */ { SIZE_ID },
|
||||
/* 10 */ { CRC_END, 1 },
|
||||
/* 11 */ { CRC, 1 },
|
||||
/* 12 */ { MFM, 0x4e, f.gap_2 },
|
||||
/* 13 */ { MFM, 0x00, 12 },
|
||||
/* 14 */ { CRC_CCITT_START, 2 },
|
||||
/* 15 */ { RAW, 0x4489, 3 },
|
||||
/* 16 */ { MFM, 0xfb, 1 },
|
||||
/* 17 */ { SECTOR_DATA, -1 },
|
||||
/* 18 */ { CRC_END, 2 },
|
||||
/* 19 */ { CRC, 2 },
|
||||
/* 20 */ { MFM, 0x4e, f.gap_3 },
|
||||
/* 21 */ { SECTOR_LOOP_END },
|
||||
/* 22 */ { MFM, 0x4e, 0 },
|
||||
/* 23 */ { RAWBITS, 0x9254, 0 },
|
||||
/* 24 */ { END }
|
||||
};
|
||||
|
||||
int current_size = f.gap_1*16;
|
||||
if(f.sector_base_size)
|
||||
current_size += f.sector_base_size * f.sector_count * 16;
|
||||
else {
|
||||
for(int j=0; j != f.sector_count; j++)
|
||||
current_size += f.per_sector_size[j] * 16;
|
||||
}
|
||||
current_size += (12+3+1+4+2+f.gap_2+12+3+1+2+f.gap_3) * f.sector_count * 16;
|
||||
|
||||
int total_size = 200000000/f.cell_size;
|
||||
int remaining_size = total_size - current_size;
|
||||
if(remaining_size < 0)
|
||||
throw emu_fatalerror("d81_format: Incorrect track layout, max_size=%d, current_size=%d", total_size, current_size);
|
||||
|
||||
// Fixup the end gap
|
||||
desc[22].p2 = remaining_size / 16;
|
||||
desc[23].p2 = remaining_size & 15;
|
||||
desc[23].p1 >>= 16-(remaining_size & 15);
|
||||
|
||||
int track_size = compute_track_size(f);
|
||||
|
||||
UINT8 sectdata[40*512];
|
||||
desc_s sectors[40];
|
||||
build_sector_description(f, sectdata, sectors);
|
||||
|
||||
for(int track=0; track < f.track_count; track++)
|
||||
for(int head=0; head < f.head_count; head++) {
|
||||
io_generic_read(io, sectdata, (track*f.head_count + !head)*track_size, track_size);
|
||||
generate_track(desc, track, head, sectors, f.sector_count, total_size, image);
|
||||
}
|
||||
|
||||
image->set_variant(f.variant);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
const floppy_format_type FLOPPY_D81_FORMAT = &floppy_image_format_creator<d81_format>;
|
||||
|
||||
@ -2,20 +2,29 @@
|
||||
|
||||
formats/d81_dsk.h
|
||||
|
||||
Floppy format code for Commodore 1581 disk images
|
||||
Commodore 1581 disk image format
|
||||
|
||||
*********************************************************************/
|
||||
|
||||
#ifndef __D81_DSK__
|
||||
#define __D81_DSK__
|
||||
#ifndef D81_DSK_H_
|
||||
#define D81_DSK_H_
|
||||
|
||||
#include "flopimg.h"
|
||||
#include "wd177x_dsk.h"
|
||||
|
||||
/***************************************************************************
|
||||
PROTOTYPES
|
||||
***************************************************************************/
|
||||
class d81_format : public wd177x_format {
|
||||
public:
|
||||
d81_format();
|
||||
|
||||
FLOPPY_IDENTIFY( d81_dsk_identify );
|
||||
FLOPPY_CONSTRUCT( d81_dsk_construct );
|
||||
virtual const char *name() const;
|
||||
virtual const char *description() const;
|
||||
virtual const char *extensions() const;
|
||||
|
||||
virtual bool load(io_generic *io, UINT32 form_factor, floppy_image *image);
|
||||
|
||||
private:
|
||||
static const format formats[];
|
||||
};
|
||||
|
||||
extern const floppy_format_type FLOPPY_D81_FORMAT;
|
||||
|
||||
#endif
|
||||
|
||||
@ -1369,6 +1369,10 @@ void floppy_image_format_t::generate_track(const desc_e *desc, int track, int he
|
||||
mfm_w(buffer, offset, 8, head);
|
||||
break;
|
||||
|
||||
case HEAD_ID_SWAP:
|
||||
mfm_w(buffer, offset, 8, !head);
|
||||
break;
|
||||
|
||||
case TRACK_HEAD_ID_GCR6:
|
||||
raw_w(buffer, offset, 8, gcr6fw_tb[(track & 0x40 ? 1 : 0) | (head ? 0x20 : 0)]);
|
||||
break;
|
||||
|
||||
@ -308,6 +308,7 @@ protected:
|
||||
TRACK_ID, //!< Track id byte, mfm-encoded
|
||||
TRACK_ID_GCR6, //!< Track id low 6 bits, gcr6-encoded
|
||||
HEAD_ID, //!< Head id byte, mfm-encoded
|
||||
HEAD_ID_SWAP, //!< Head id byte swapped (0->1, 1->0), mfm-encoded
|
||||
TRACK_HEAD_ID_GCR6, //!< Track id 7th bit + head, gc6-encoded
|
||||
SECTOR_ID, //!< Sector id byte, mfm-encoded
|
||||
SECTOR_ID_GCR6, //!< Sector id byte, gcr6-encoded
|
||||
|
||||
@ -39,7 +39,7 @@ public:
|
||||
virtual bool save(io_generic *io, floppy_image *image);
|
||||
virtual bool supports_save() const;
|
||||
|
||||
private:
|
||||
protected:
|
||||
const format *formats;
|
||||
int find_size(io_generic *io, UINT32 form_factor);
|
||||
int compute_track_size(const format &f) const;
|
||||
|
||||
@ -7,6 +7,14 @@
|
||||
|
||||
**********************************************************************/
|
||||
|
||||
/*
|
||||
|
||||
TODO:
|
||||
|
||||
- wd_fdc drops the busy bit too soon, c1581 aborts reading the sector ID after the first CRC byte @CD17
|
||||
|
||||
*/
|
||||
|
||||
#include "c1581.h"
|
||||
|
||||
|
||||
@ -17,7 +25,7 @@
|
||||
|
||||
#define M6502_TAG "u1"
|
||||
#define M8520_TAG "u5"
|
||||
#define WD1770_TAG "u4"
|
||||
#define WD1772_TAG "u4"
|
||||
|
||||
|
||||
enum
|
||||
@ -64,7 +72,7 @@ void base_c1581_device::device_config_complete()
|
||||
|
||||
ROM_START( c1581 )
|
||||
ROM_REGION( 0x8000, M6502_TAG, 0 )
|
||||
ROM_DEFAULT_BIOS("r2")
|
||||
ROM_DEFAULT_BIOS("r1")
|
||||
ROM_SYSTEM_BIOS( 0, "beta", "Beta" )
|
||||
ROMX_LOAD( "beta.u2", 0x0000, 0x8000, CRC(ecc223cd) SHA1(a331d0d46ead1f0275b4ca594f87c6694d9d9594), ROM_BIOS(1) )
|
||||
ROM_SYSTEM_BIOS( 1, "r1", "Revision 1" )
|
||||
@ -109,9 +117,9 @@ const rom_entry *base_c1581_device::device_rom_region() const
|
||||
//-------------------------------------------------
|
||||
|
||||
static ADDRESS_MAP_START( c1581_mem, AS_PROGRAM, 8, base_c1581_device )
|
||||
AM_RANGE(0x0000, 0x1fff) AM_MIRROR(0x2000) AM_RAM
|
||||
AM_RANGE(0x0000, 0x1fff) AM_RAM
|
||||
AM_RANGE(0x4000, 0x400f) AM_MIRROR(0x1ff0) AM_DEVREADWRITE(M8520_TAG, mos8520_device, read, write)
|
||||
AM_RANGE(0x6000, 0x6003) AM_MIRROR(0x1ffc) AM_DEVREADWRITE_LEGACY(WD1770_TAG, wd17xx_r, wd17xx_w)
|
||||
AM_RANGE(0x6000, 0x6003) AM_MIRROR(0x1ffc) AM_DEVREADWRITE(WD1772_TAG, wd1772_t, read, write)
|
||||
AM_RANGE(0x8000, 0xffff) AM_ROM AM_REGION(M6502_TAG, 0)
|
||||
ADDRESS_MAP_END
|
||||
|
||||
@ -122,18 +130,16 @@ ADDRESS_MAP_END
|
||||
|
||||
WRITE_LINE_MEMBER( base_c1581_device::cnt_w )
|
||||
{
|
||||
// fast serial clock out
|
||||
m_cnt_out = state;
|
||||
|
||||
set_iec_srq();
|
||||
update_iec();
|
||||
}
|
||||
|
||||
WRITE_LINE_MEMBER( base_c1581_device::sp_w )
|
||||
{
|
||||
// fast serial data out
|
||||
m_sp_out = state;
|
||||
|
||||
set_iec_data();
|
||||
update_iec();
|
||||
}
|
||||
|
||||
READ8_MEMBER( base_c1581_device::cia_pa_r )
|
||||
@ -156,13 +162,13 @@ READ8_MEMBER( base_c1581_device::cia_pa_r )
|
||||
UINT8 data = 0;
|
||||
|
||||
// ready
|
||||
data |= !(floppy_drive_get_flag_state(m_image, FLOPPY_DRIVE_READY) == FLOPPY_DRIVE_READY) << 1;
|
||||
data |= !m_floppy->ready_r() << 1;
|
||||
|
||||
// device number
|
||||
data |= (m_address - 8) << 3;
|
||||
|
||||
// disk change
|
||||
data |= floppy_dskchg_r(m_image) << 7;
|
||||
data |= m_floppy->dskchg_r() << 7;
|
||||
|
||||
return data;
|
||||
}
|
||||
@ -184,13 +190,11 @@ WRITE8_MEMBER( base_c1581_device::cia_pa_w )
|
||||
|
||||
*/
|
||||
|
||||
// side 0
|
||||
wd17xx_set_side(m_fdc, !BIT(data, 0));
|
||||
// side select
|
||||
m_floppy->ss_w(BIT(data, 0));
|
||||
|
||||
// motor
|
||||
int motor = BIT(data, 2);
|
||||
floppy_mon_w(m_image, motor);
|
||||
floppy_drive_set_ready_state(m_image, !motor, 1);
|
||||
m_floppy->mon_w(BIT(data, 2));
|
||||
|
||||
// power led
|
||||
output_set_led_value(LED_POWER, BIT(data, 5));
|
||||
@ -225,7 +229,7 @@ READ8_MEMBER( base_c1581_device::cia_pb_r )
|
||||
data |= !m_bus->clk_r() << 2;
|
||||
|
||||
// write protect
|
||||
data |= !floppy_wpt_r(m_image) << 6;
|
||||
data |= !m_floppy->wpt_r() << 6;
|
||||
|
||||
// attention in
|
||||
data |= !m_bus->atn_r() << 7;
|
||||
@ -260,18 +264,9 @@ WRITE8_MEMBER( base_c1581_device::cia_pb_w )
|
||||
m_atn_ack = BIT(data, 4);
|
||||
|
||||
// fast serial direction
|
||||
int fast_ser_dir = BIT(data, 5);
|
||||
m_fast_ser_dir = BIT(data, 5);
|
||||
|
||||
if (m_fast_ser_dir != fast_ser_dir)
|
||||
{
|
||||
m_fast_ser_dir = fast_ser_dir;
|
||||
|
||||
set_iec_data();
|
||||
set_iec_srq();
|
||||
|
||||
m_cia->cnt_w(m_fast_ser_dir || m_bus->srq_r());
|
||||
m_cia->sp_w(m_fast_ser_dir || m_bus->data_r());
|
||||
}
|
||||
update_iec();
|
||||
}
|
||||
|
||||
static MOS8520_INTERFACE( cia_intf )
|
||||
@ -288,43 +283,21 @@ static MOS8520_INTERFACE( cia_intf )
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// wd17xx_interface fdc_intf
|
||||
// SLOT_INTERFACE( c1581_floppies )
|
||||
//-------------------------------------------------
|
||||
|
||||
static const wd17xx_interface fdc_intf =
|
||||
{
|
||||
DEVCB_LINE_GND,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
{ FLOPPY_0, NULL, NULL, NULL }
|
||||
};
|
||||
static SLOT_INTERFACE_START( c1581_floppies )
|
||||
SLOT_INTERFACE( "35dd", FLOPPY_35_DD ) // Chinon F-354-E
|
||||
SLOT_INTERFACE_END
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// LEGACY_FLOPPY_OPTIONS( c1581 )
|
||||
// FLOPPY_FORMATS( c1581_device::floppy_formats )
|
||||
//-------------------------------------------------
|
||||
|
||||
static LEGACY_FLOPPY_OPTIONS_START( c1581 )
|
||||
LEGACY_FLOPPY_OPTION( c1581, "d81", "Commodore 1581 Disk Image", d81_dsk_identify, d81_dsk_construct, NULL, NULL )
|
||||
LEGACY_FLOPPY_OPTIONS_END
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// floppy_interface c1581_floppy_interface
|
||||
//-------------------------------------------------
|
||||
|
||||
static const floppy_interface c1581_floppy_interface =
|
||||
{
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
DEVCB_NULL,
|
||||
FLOPPY_STANDARD_3_5_DSDD,
|
||||
LEGACY_FLOPPY_OPTIONS_NAME(c1581),
|
||||
"floppy_3_5",
|
||||
NULL
|
||||
};
|
||||
FLOPPY_FORMATS_MEMBER( base_c1581_device::floppy_formats )
|
||||
FLOPPY_D81_FORMAT
|
||||
FLOPPY_FORMATS_END
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
@ -336,9 +309,9 @@ static MACHINE_CONFIG_FRAGMENT( c1581 )
|
||||
MCFG_CPU_PROGRAM_MAP(c1581_mem)
|
||||
|
||||
MCFG_MOS8520_ADD(M8520_TAG, XTAL_16MHz/8, 0, cia_intf)
|
||||
MCFG_WD1770_ADD(WD1770_TAG, /*XTAL_16MHz/2,*/ fdc_intf)
|
||||
MCFG_WD1772x_ADD(WD1772_TAG, XTAL_16MHz/2)
|
||||
|
||||
MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, c1581_floppy_interface)
|
||||
MCFG_FLOPPY_DRIVE_ADD(WD1772_TAG":0", c1581_floppies, "35dd", 0, base_c1581_device::floppy_formats)
|
||||
MACHINE_CONFIG_END
|
||||
|
||||
|
||||
@ -354,42 +327,6 @@ machine_config_constructor base_c1581_device::device_mconfig_additions() const
|
||||
|
||||
|
||||
|
||||
//**************************************************************************
|
||||
// INLINE HELPERS
|
||||
//**************************************************************************
|
||||
|
||||
//-------------------------------------------------
|
||||
// base_c1581_device - constructor
|
||||
//-------------------------------------------------
|
||||
|
||||
inline void base_c1581_device::set_iec_data()
|
||||
{
|
||||
int atn = m_bus->atn_r();
|
||||
int data = !m_data_out && !(m_atn_ack && !atn);
|
||||
|
||||
// fast serial data
|
||||
if (m_fast_ser_dir) data &= m_sp_out;
|
||||
|
||||
m_bus->data_w(this, data);
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// base_c1581_device - constructor
|
||||
//-------------------------------------------------
|
||||
|
||||
inline void base_c1581_device::set_iec_srq()
|
||||
{
|
||||
int srq = 1;
|
||||
|
||||
// fast serial clock
|
||||
if (m_fast_ser_dir) srq &= m_cnt_out;
|
||||
|
||||
m_bus->srq_w(this, srq);
|
||||
}
|
||||
|
||||
|
||||
|
||||
//**************************************************************************
|
||||
// LIVE DEVICE
|
||||
//**************************************************************************
|
||||
@ -403,8 +340,13 @@ base_c1581_device::base_c1581_device(const machine_config &mconfig, device_type
|
||||
device_cbm_iec_interface(mconfig, *this),
|
||||
m_maincpu(*this, M6502_TAG),
|
||||
m_cia(*this, M8520_TAG),
|
||||
m_fdc(*this, WD1770_TAG),
|
||||
m_image(*this, FLOPPY_0),
|
||||
m_fdc(*this, WD1772_TAG),
|
||||
m_floppy(*this, WD1772_TAG":0:35dd"),
|
||||
m_data_out(0),
|
||||
m_atn_ack(0),
|
||||
m_fast_ser_dir(0),
|
||||
m_sp_out(1),
|
||||
m_cnt_out(1),
|
||||
m_variant(variant)
|
||||
{
|
||||
}
|
||||
@ -450,12 +392,15 @@ void base_c1581_device::device_reset()
|
||||
m_maincpu->reset();
|
||||
|
||||
m_cia->reset();
|
||||
m_fdc->reset();
|
||||
|
||||
wd17xx_mr_w(m_fdc, 0);
|
||||
wd17xx_mr_w(m_fdc, 1);
|
||||
m_fdc->set_floppy(m_floppy);
|
||||
m_fdc->dden_w(0);
|
||||
|
||||
m_sp_out = 1;
|
||||
m_cnt_out = 1;
|
||||
|
||||
update_iec();
|
||||
}
|
||||
|
||||
|
||||
@ -465,7 +410,7 @@ void base_c1581_device::device_reset()
|
||||
|
||||
void base_c1581_device::cbm_iec_srq(int state)
|
||||
{
|
||||
m_cia->cnt_w(m_fast_ser_dir || state);
|
||||
update_iec();
|
||||
}
|
||||
|
||||
|
||||
@ -475,9 +420,7 @@ void base_c1581_device::cbm_iec_srq(int state)
|
||||
|
||||
void base_c1581_device::cbm_iec_atn(int state)
|
||||
{
|
||||
m_cia->flag_w(state);
|
||||
|
||||
set_iec_data();
|
||||
update_iec();
|
||||
}
|
||||
|
||||
|
||||
@ -487,7 +430,7 @@ void base_c1581_device::cbm_iec_atn(int state)
|
||||
|
||||
void base_c1581_device::cbm_iec_data(int state)
|
||||
{
|
||||
m_cia->sp_w(m_fast_ser_dir || state);
|
||||
update_iec();
|
||||
}
|
||||
|
||||
|
||||
@ -502,3 +445,31 @@ void base_c1581_device::cbm_iec_reset(int state)
|
||||
device_reset();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//-------------------------------------------------
|
||||
// update_iec -
|
||||
//-------------------------------------------------
|
||||
|
||||
void base_c1581_device::update_iec()
|
||||
{
|
||||
int atn = m_bus->atn_r();
|
||||
|
||||
m_cia->cnt_w(m_fast_ser_dir || m_bus->srq_r());
|
||||
m_cia->sp_w(m_fast_ser_dir || m_bus->data_r());
|
||||
m_cia->flag_w(atn);
|
||||
|
||||
// serial data
|
||||
int data = !m_data_out && !(m_atn_ack && !atn);
|
||||
|
||||
if (m_fast_ser_dir) data &= m_sp_out;
|
||||
|
||||
m_bus->data_w(this, data);
|
||||
|
||||
// fast clock
|
||||
int srq = 1;
|
||||
|
||||
if (m_fast_ser_dir) srq &= m_cnt_out;
|
||||
|
||||
m_bus->srq_w(this, srq);
|
||||
}
|
||||
|
||||
@ -15,11 +15,10 @@
|
||||
|
||||
#include "emu.h"
|
||||
#include "cpu/m6502/m6502.h"
|
||||
#include "imagedev/flopdrv.h"
|
||||
#include "formats/d81_dsk.h"
|
||||
#include "machine/cbmiec.h"
|
||||
#include "machine/mos6526.h"
|
||||
#include "machine/wd17xx.h"
|
||||
#include "machine/wd_fdc.h"
|
||||
|
||||
|
||||
|
||||
@ -63,6 +62,8 @@ public:
|
||||
DECLARE_READ8_MEMBER( cia_pb_r );
|
||||
DECLARE_WRITE8_MEMBER( cia_pb_w );
|
||||
|
||||
DECLARE_FLOPPY_FORMATS( floppy_formats );
|
||||
|
||||
protected:
|
||||
// device-level overrides
|
||||
virtual void device_config_complete();
|
||||
@ -75,13 +76,12 @@ protected:
|
||||
virtual void cbm_iec_data(int state);
|
||||
virtual void cbm_iec_reset(int state);
|
||||
|
||||
inline void set_iec_data();
|
||||
inline void set_iec_srq();
|
||||
void update_iec();
|
||||
|
||||
required_device<cpu_device> m_maincpu;
|
||||
required_device<mos6526_device> m_cia;
|
||||
required_device<wd1770_device> m_fdc;
|
||||
required_device<legacy_floppy_image_device> m_image;
|
||||
required_device<wd1772_t> m_fdc;
|
||||
required_device<floppy_image_device> m_floppy;
|
||||
|
||||
int m_data_out; // serial data out
|
||||
int m_atn_ack; // attention acknowledge
|
||||
|
||||
Loading…
Reference in New Issue
Block a user