Previous

199869 Revisions

Next

r19557 Friday 14th December, 2012 at 17:30:42 UTC by Curt Coder
(MESS) c1581: Modernized floppy, WIP. (nw)

[src/emu/machine]	mos6526.c mos6526.h
[src/lib/formats]	d81_dsk.c d81_dsk.h flopimg.c flopimg.h wd177x_dsk.h
[src/mess/machine]	c1581.c c1581.h

trunk/src/emu/machine/mos6526.c

r19556	r19557
935	935	return data;
936	936	}
937	937
	938	READ8_MEMBER( mos8520_device::read )
	939	{
	940	UINT8 data = 0;
938	941
	942	switch (offset)
	943	{
	944	case TOD_MIN:
	945	if (!m_tod_latched)
	946	{
	947	m_tod_latched = true;
	948	m_tod_latch = m_tod;
	949	}
	950
	951	data = read_tod(2);
	952	break;
	953
	954	case TOD_HR:
	955	data = read_tod(3);
	956	break;
	957
	958	default:
	959	data = mos6526_device::read(space, offset);
	960	}
	961
	962	return data;
	963	}
	964
939	965	//-------------------------------------------------
940	966	//  write -
941	967	//-------------------------------------------------
r19556	r19557
1070	1096	}
1071	1097	}
1072	1098
	1099	WRITE8_MEMBER( mos8520_device::write )
	1100	{
	1101	switch (offset)
	1102	{
	1103	default:
	1104	mos6526_device::write(space, offset, data);
	1105	break;
1073	1106
	1107	case TOD_MIN:
	1108	m_tod_stopped = true;
	1109	write_tod(2, data);
	1110	break;
	1111
	1112	case TOD_HR:
	1113	write_tod(3, data);
	1114	break;
	1115	}
	1116	}
	1117
	1118
1074	1119	//-------------------------------------------------
1075	1120	//  pa_r - port A read
1076	1121	//-------------------------------------------------

trunk/src/emu/machine/mos6526.h

r19556	r19557
247	247	public:
248	248	mos8520_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
249	249
250		//DECLARE_READ8_MEMBER( read );
251		//DECLARE_WRITE8_MEMBER( write );
	250	DECLARE_READ8_MEMBER( read );
	251	DECLARE_WRITE8_MEMBER( write );
252	252
253	253	protected:
254	254	inline void clock_tod();

trunk/src/lib/formats/d81_dsk.c

r19556	r19557
	1	/***************************************************************************
	2
	3	Copyright Olivier Galibert
	4	All rights reserved.
	5
	6	Redistribution and use in source and binary forms, with or without
	7	modification, are permitted provided that the following conditions are
	8	met:
	9
	10	* Redistributions of source code must retain the above copyright
	11	notice, this list of conditions and the following disclaimer.
	12	* Redistributions in binary form must reproduce the above copyright
	13	notice, this list of conditions and the following disclaimer in
	14	the documentation and/or other materials provided with the
	15	distribution.
	16	* Neither the name 'MAME' nor the names of its contributors may be
	17	used to endorse or promote products derived from this software
	18	without specific prior written permission.
	19
	20	THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
	21	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	22	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	23	DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
	24	INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	25	(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	26	SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	28	STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	29	IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	30	POSSIBILITY OF SUCH DAMAGE.
	31
	32	****************************************************************************/
	33
1	34	/*********************************************************************
2	35
3	36	formats/d81_dsk.c
r19556	r19557
2	35
3		Floppy format code for Commodore 1581 disk images
	36	Commodore 1581 disk image format
4	37
5	38	*********************************************************************/
6	39
7		#include "basicdsk.h"
8		#include "d81_dsk.h"
	40	/*
9	41
10		/***************************************************************************
11		PARAMETERS
12		***************************************************************************/
	42	PER TRACK ORGANIZATION:
13	43
14		#define D81_SIZE   819200
	44	Hex 4E written as a gap, with 10 sectors of data, with full gaps written for motor speed variation.
15	45
16		/***************************************************************************
17		IMPLEMENTATION
18		***************************************************************************/
	46	PER SECTOR ORGANIZATION:
19	47
20		/*-------------------------------------------------
21		d81_translate_offset - translates the
22		physical offset to a logical offset within
23		the disk image
24		-------------------------------------------------*/
	48	MFM Encoding
	49	12 Bytes of Hex 00
	50	3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
	51	1 Byte of Hex FE (ID Address Mark)
	52	1 Byte (Track Number)
	53	1 Byte (Side Number)
	54	1 Byte (Sector Number)
	55	1 Byte (Sector Length, 02 for 512 Byte Sectors)
	56	2 Bytes CRC (Cyclic Redundancy Check)
	57	22 Bytes of Hex 22
	58	12 Bytes of Hex 00
	59	3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
	60	1 Byte of Hex FB (Data Address Mark)
	61	512 Bytes of Data
	62	2 Bytes of CRC (Cyclic Redundancy Check)
	63	38 Bytes of Hex 4E
25	64
26		/*
	65	file offset       | CBM logical  |  drive physical   |   specials
	66	decimal sedecimal | track/sector | cyl head sec offs |
	67	------------------+--------------+-------------------+--------------
	68	0 0x000000  |    01;00     |   00;01;01        | first block
	69	256 0x000100  |    01;01     |   00;01;01   +256 |
	70	.     .     |      .       |     .  .          |
	71	4864 0x001300  |    01;19     |   00;01;10   +256 |
	72	5120 0x001400  |    01;20     |   00;00;01        |
	73	.     .     |      .       |     .  .          |
	74	9984 0x002700  |    01;39     |   00;00;10   +256 |
	75	10240 0x002800  |    02;00     |   01;01;01        |
	76	.     .     |      .       |     .  .          |
	77	15360 0x003C00  |    02;20     |   01;00;01        |
	78	.     .     |      .       |     .  .          |
	79	20480 0x005000  |    03;00     |   02;01;01        |
	80	.     .     |      .       |     .  .          |
	81	.     .     |      .       |     .  .          |
	82	30729 0x007800  |    04;00     |   03;01;01        |
	83	.     .     |      .       |     .  .          |
	84	.     .     |      .       |     .  .          |
	85	.     .     |      .       |     .  .          |
	86	399360 0x061800  |    40;00     |   39;01;01        | disk header
	87	399616 0x061900  |    40;01     |   39;01;01   +256 | 1st BAM block
	88	399872 0x061A00  |    40;02     |   39;01;02        | 2nd BAM block
	89	400128 0x061B00  |    40;03     |   39;01;02   +256 | 1st dir block
	90	.     .     |      .       |     .  .          |
	91	409600 0x064000  |    41;00     |   40;01;01        |
	92	.     .     |      .       |     .  .          |
	93	.     .     |      .       |     .  .          |
	94	.     .     |      .       |     .  .          |
	95	808960 0x0C5800  |    80;00     |   79;01;01        |
	96	.     .     |      .       |     .  .          |
	97	813824 0x0C6B00  |    80;19     |   79;01;10   +256 |
	98	814080 0x0C6C00  |    80;20     |   79;00;01        |
	99	.     .     |      .       |     .  .          |
	100	818688 0x0C7E00  |    80;38     |   79;00;10        |
	101	818944 0x0C7F00  |    80;39     |   79;00;10   +256 | last block
27	102
28		file offset       | CBM logical  |  drive physical   |   specials
29		decimal sedecimal | track/sector | cyl head sec offs |
30		------------------+--------------+-------------------+--------------
31		0 0x000000  |    01;00     |   00;01;01        | first block
32		256 0x000100  |    01;01     |   00;01;01   +256 |
33		.     .     |      .       |     .  .          |
34		4864 0x001300  |    01;19     |   00;01;10   +256 |
35		5120 0x001400  |    01;20     |   00;00;01        |
36		.     .     |      .       |     .  .          |
37		9984 0x002700  |    01;39     |   00;00;10   +256 |
38		10240 0x002800  |    02;00     |   01;01;01        |
39		.     .     |      .       |     .  .          |
40		15360 0x003C00  |    02;20     |   01;00;01        |
41		.     .     |      .       |     .  .          |
42		20480 0x005000  |    03;00     |   02;01;01        |
43		.     .     |      .       |     .  .          |
44		.     .     |      .       |     .  .          |
45		30729 0x007800  |    04;00     |   03;01;01        |
46		.     .     |      .       |     .  .          |
47		.     .     |      .       |     .  .          |
48		.     .     |      .       |     .  .          |
49		399360 0x061800  |    40;00     |   39;01;01        | disk header
50		399616 0x061900  |    40;01     |   39;01;01   +256 | 1st BAM block
51		399872 0x061A00  |    40;02     |   39;01;02        | 2nd BAM block
52		400128 0x061B00  |    40;03     |   39;01;02   +256 | 1st dir block
53		.     .     |      .       |     .  .          |
54		409600 0x064000  |    41;00     |   40;01;01        |
55		.     .     |      .       |     .  .          |
56		.     .     |      .       |     .  .          |
57		.     .     |      .       |     .  .          |
58		808960 0x0C5800  |    80;00     |   79;01;01        |
59		.     .     |      .       |     .  .          |
60		813824 0x0C6B00  |    80;19     |   79;01;10   +256 |
61		814080 0x0C6C00  |    80;20     |   79;00;01        |
62		.     .     |      .       |     .  .          |
63		818688 0x0C7E00  |    80;38     |   79;00;10        |
64		818944 0x0C7F00  |    80;39     |   79;00;10   +256 | last block
65
66	103	*/
67	104
68		static UINT64 d81_translate_offset(floppy_image_legacy *floppy, const struct basicdsk_geometry *geom, int track, int head, int sector)
	105	#include "emu.h"
	106	#include "formats/d81_dsk.h"
	107
	108	d81_format::d81_format() : wd177x_format(formats)
69	109	{
70		UINT64 offset = (track * 20) + (!head * 10) + sector;
	110	}
71	111
72		return offset;
	112	const char *d81_format::name() const
	113	{
	114	return "d81";
73	115	}
74	116
75		/*-------------------------------------------------
76		FLOPPY_IDENTIFY( d81_dsk_identify )
77		-------------------------------------------------*/
	117	const char *d81_format::description() const
	118	{
	119	return "Commodore 1581 disk image";
	120	}
78	121
79		FLOPPY_IDENTIFY( d81_dsk_identify )
	122	const char *d81_format::extensions() const
80	123	{
81		*vote = (floppy_image_size(floppy) == D81_SIZE) ? 100 : 0;
82
83		return FLOPPY_ERROR_SUCCESS;
	124	return "d81";
84	125	}
85	126
86		/*-------------------------------------------------
87		FLOPPY_CONSTRUCT( d81_dsk_construct )
88		-------------------------------------------------*/
	127	// Unverified gap sizes
	128	const d81_format::format d81_format::formats[] = {
	129	{
	130	floppy_image::FF_35, floppy_image::DSDD,
	131	2000, 10, 80, 2, 512, {}, 1, {}, 32, 22, 35
	132	},
	133	{}
	134	};
89	135
90		/*
91		PER TRACK ORGANIZATION:
	136	bool d81_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
	137	{
	138	int type = find_size(io, form_factor);
	139	if(type == -1)
	140	return false;
92	141
93		Hex 4E written as a gap, with 10 sectors of data, with full gaps written for motor speed variation.
	142	const format &f = formats[type];
94	143
95		PER SECTOR ORGANIZATION:
	144	floppy_image_format_t::desc_e desc[] = {
	145	/* 00 */ { MFM, 0x4e, f.gap_1 },
	146	/* 01 */ { SECTOR_LOOP_START, 0, f.sector_count-1 },
	147	/* 02 */ {   MFM, 0x00, 12 },
	148	/* 03 */ {   CRC_CCITT_START, 1 },
	149	/* 04 */ {     RAW, 0x4489, 3 },
	150	/* 05 */ {     MFM, 0xfe, 1 },
	151	/* 06 */ {     TRACK_ID },
	152	/* 07 */ {     HEAD_ID_SWAP },
	153	/* 08 */ {     SECTOR_ID },
	154	/* 09 */ {     SIZE_ID },
	155	/* 10 */ {   CRC_END, 1 },
	156	/* 11 */ {   CRC, 1 },
	157	/* 12 */ {   MFM, 0x4e, f.gap_2 },
	158	/* 13 */ {   MFM, 0x00, 12 },
	159	/* 14 */ {   CRC_CCITT_START, 2 },
	160	/* 15 */ {     RAW, 0x4489, 3 },
	161	/* 16 */ {     MFM, 0xfb, 1 },
	162	/* 17 */ {     SECTOR_DATA, -1 },
	163	/* 18 */ {   CRC_END, 2 },
	164	/* 19 */ {   CRC, 2 },
	165	/* 20 */ {   MFM, 0x4e, f.gap_3 },
	166	/* 21 */ { SECTOR_LOOP_END },
	167	/* 22 */ { MFM, 0x4e, 0 },
	168	/* 23 */ { RAWBITS, 0x9254, 0 },
	169	/* 24 */ { END }
	170	};
96	171
97		MFM Encoding
98		12 Bytes of Hex 00
99		3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
100		1 Byte of Hex FE (ID Address Mark)
101		1 Byte (Track Number)
102		1 Byte (Side Number)
103		1 Byte (Sector Number)
104		1 Byte (Sector Length, 02 for 512 Byte Sectors)
105		2 Bytes CRC (Cyclic Redundancy Check)
106		22 Bytes of Hex 22
107		12 Bytes of Hex 00
108		3 Bytes of Hex A1 (Data Hex A1, Clock Hex 0A)
109		1 Byte of Hex FB (Data Address Mark)
110		512 Bytes of Data
111		2 Bytes of CRC (Cyclic Redundancy Check)
112		38 Bytes of Hex 4E
113		*/
	172	int current_size = f.gap_1*16;
	173	if(f.sector_base_size)
	174	current_size += f.sector_base_size * f.sector_count * 16;
	175	else {
	176	for(int j=0; j != f.sector_count; j++)
	177	current_size += f.per_sector_size[j] * 16;
	178	}
	179	current_size += (12+3+1+4+2+f.gap_2+12+3+1+2+f.gap_3) * f.sector_count * 16;
114	180
115		FLOPPY_CONSTRUCT( d81_dsk_construct )
116		{
117		struct basicdsk_geometry geometry;
	181	int total_size = 200000000/f.cell_size;
	182	int remaining_size = total_size - current_size;
	183	if(remaining_size < 0)
	184	throw emu_fatalerror("d81_format: Incorrect track layout, max_size=%d, current_size=%d", total_size, current_size);
118	185
119		memset(&geometry, 0, sizeof(geometry));
	186	// Fixup the end gap
	187	desc[22].p2 = remaining_size / 16;
	188	desc[23].p2 = remaining_size & 15;
	189	desc[23].p1 >>= 16-(remaining_size & 15);
120	190
121		geometry.heads = 2;
122		geometry.first_sector_id = 1;
123		geometry.sector_length = 512;
124		geometry.tracks = 80;
125		geometry.sectors = 10;
126		geometry.translate_offset = d81_translate_offset;
	191	int track_size = compute_track_size(f);
127	192
128		return basicdsk_construct(floppy, &geometry);
	193	UINT8 sectdata[40*512];
	194	desc_s sectors[40];
	195	build_sector_description(f, sectdata, sectors);
	196
	197	for(int track=0; track < f.track_count; track++)
	198	for(int head=0; head < f.head_count; head++) {
	199	io_generic_read(io, sectdata, (track*f.head_count + !head)*track_size, track_size);
	200	generate_track(desc, track, head, sectors, f.sector_count, total_size, image);
	201	}
	202
	203	image->set_variant(f.variant);
	204
	205	return true;
129	206	}
	207
	208	const floppy_format_type FLOPPY_D81_FORMAT = &floppy_image_format_creator<d81_format>;

trunk/src/lib/formats/d81_dsk.h

r19556	r19557
2	2
3	3	formats/d81_dsk.h
4	4
5		Floppy format code for Commodore 1581 disk images
	5	Commodore 1581 disk image format
6	6
7	7	*********************************************************************/
8	8
9		#ifndef __D81_DSK__
10		#define __D81_DSK__
	9	#ifndef D81_DSK_H_
	10	#define D81_DSK_H_
11	11
12		#include "flopimg.h"
	12	#include "wd177x_dsk.h"
13	13
14		/***************************************************************************
15		PROTOTYPES
16		***************************************************************************/
	14	class d81_format : public wd177x_format {
	15	public:
	16	d81_format();
17	17
18		FLOPPY_IDENTIFY( d81_dsk_identify );
19		FLOPPY_CONSTRUCT( d81_dsk_construct );
	18	virtual const char *name() const;
	19	virtual const char *description() const;
	20	virtual const char *extensions() const;
20	21
	22	virtual bool load(io_generic *io, UINT32 form_factor, floppy_image *image);
	23
	24	private:
	25	static const format formats[];
	26	};
	27
	28	extern const floppy_format_type FLOPPY_D81_FORMAT;
	29
21	30	#endif

trunk/src/lib/formats/wd177x_dsk.h

r19556	r19557
39	39	virtual bool save(io_generic *io, floppy_image *image);
40	40	virtual bool supports_save() const;
41	41
42		private:
	42	protected:
43	43	const format *formats;
44	44	int find_size(io_generic *io, UINT32 form_factor);
45	45	int compute_track_size(const format &f) const;

trunk/src/lib/formats/flopimg.c

r19556	r19557
1369	1369	mfm_w(buffer, offset, 8, head);
1370	1370	break;
1371	1371
	1372	case HEAD_ID_SWAP:
	1373	mfm_w(buffer, offset, 8, !head);
	1374	break;
	1375
1372	1376	case TRACK_HEAD_ID_GCR6:
1373	1377	raw_w(buffer, offset, 8, gcr6fw_tb[(track & 0x40 ? 1 : 0) | (head ? 0x20 : 0)]);
1374	1378	break;

trunk/src/lib/formats/flopimg.h

r19556	r19557
308	308	TRACK_ID,               //!< Track id byte, mfm-encoded
309	309	TRACK_ID_GCR6,          //!< Track id low 6 bits, gcr6-encoded
310	310	HEAD_ID,                //!< Head id byte, mfm-encoded
	311	HEAD_ID_SWAP,           //!< Head id byte swapped (0->1, 1->0), mfm-encoded
311	312	TRACK_HEAD_ID_GCR6,     //!< Track id 7th bit + head, gc6-encoded
312	313	SECTOR_ID,              //!< Sector id byte, mfm-encoded
313	314	SECTOR_ID_GCR6,         //!< Sector id byte, gcr6-encoded

trunk/src/mess/machine/c1581.c

r19556	r19557
7	7
8	8	**********************************************************************/
9	9
	10	/*
	11
	12	TODO:
	13
	14	- wd_fdc drops the busy bit too soon, c1581 aborts reading the sector ID after the first CRC byte @CD17
	15
	16	*/
	17
10	18	#include "c1581.h"
11	19
12	20
r19556	r19557
15	23	//  MACROS / CONSTANTS
16	24	//**************************************************************************
17	25
18		#define M6502_TAG      "u1"
19		#define M8520_TAG      "u5"
20		#define WD1770_TAG      "u4"
	26	#define M6502_TAG       "u1"
	27	#define M8520_TAG       "u5"
	28	#define WD1772_TAG      "u4"
21	29
22	30
23	31	enum
r19556	r19557
64	72
65	73	ROM_START( c1581 )
66	74	ROM_REGION( 0x8000, M6502_TAG, 0 )
67		ROM_DEFAULT_BIOS("r2")
68		ROM_SYSTEM_BIOS( 0, "beta", "Beta" )
69		ROMX_LOAD( "beta.u2",          0x0000, 0x8000, CRC(ecc223cd) SHA1(a331d0d46ead1f0275b4ca594f87c6694d9d9594), ROM_BIOS(1) )
70		ROM_SYSTEM_BIOS( 1, "r1", "Revision 1" )
71		ROMX_LOAD( "318045-01.u2",      0x0000, 0x8000, CRC(113af078) SHA1(3fc088349ab83e8f5948b7670c866a3c954e6164), ROM_BIOS(2) )
72		ROM_SYSTEM_BIOS( 2, "r2", "Revision 2" )
73		ROMX_LOAD( "318045-02.u2",      0x0000, 0x8000, CRC(a9011b84) SHA1(01228eae6f066bd9b7b2b6a7fa3f667e41dad393), ROM_BIOS(3) )
	75	ROM_DEFAULT_BIOS("r1")
	76	ROM_SYSTEM_BIOS( 0, "beta", "Beta" )
	77	ROMX_LOAD( "beta.u2",          0x0000, 0x8000, CRC(ecc223cd) SHA1(a331d0d46ead1f0275b4ca594f87c6694d9d9594), ROM_BIOS(1) )
	78	ROM_SYSTEM_BIOS( 1, "r1", "Revision 1" )
	79	ROMX_LOAD( "318045-01.u2",     0x0000, 0x8000, CRC(113af078) SHA1(3fc088349ab83e8f5948b7670c866a3c954e6164), ROM_BIOS(2) )
	80	ROM_SYSTEM_BIOS( 2, "r2", "Revision 2" )
	81	ROMX_LOAD( "318045-02.u2",     0x0000, 0x8000, CRC(a9011b84) SHA1(01228eae6f066bd9b7b2b6a7fa3f667e41dad393), ROM_BIOS(3) )
74	82	ROM_SYSTEM_BIOS( 3, "jiffydos", "JiffyDOS v6.01" )
75	83	ROMX_LOAD( "jiffydos 1581.u2", 0x0000, 0x8000, CRC(98873d0f) SHA1(65bbf2be7bcd5bdcbff609d6c66471ffb9d04bfe), ROM_BIOS(4) )
76	84	ROM_END
r19556	r19557
82	90
83	91	ROM_START( c1563 )
84	92	ROM_REGION( 0x8000, M6502_TAG, 0 )
85		ROM_LOAD( "1563-rom.bin",     0x0000, 0x8000, CRC(1d184687) SHA1(2c5111a9c15be7b7955f6c8775fea25ec10c0ca0) )
	93	ROM_LOAD( "1563-rom.bin", 0x0000, 0x8000, CRC(1d184687) SHA1(2c5111a9c15be7b7955f6c8775fea25ec10c0ca0) )
86	94	ROM_END
87	95
88	96
r19556	r19557
109	117	//-------------------------------------------------
110	118
111	119	static ADDRESS_MAP_START( c1581_mem, AS_PROGRAM, 8, base_c1581_device )
112		AM_RANGE(0x0000, 0x1fff) AM_MIRROR(0x2000) AM_RAM
	120	AM_RANGE(0x0000, 0x1fff) AM_RAM
113	121	AM_RANGE(0x4000, 0x400f) AM_MIRROR(0x1ff0) AM_DEVREADWRITE(M8520_TAG, mos8520_device, read, write)
114		AM_RANGE(0x6000, 0x6003) AM_MIRROR(0x1ffc) AM_DEVREADWRITE_LEGACY(WD1770_TAG, wd17xx_r, wd17xx_w)
	122	AM_RANGE(0x6000, 0x6003) AM_MIRROR(0x1ffc) AM_DEVREADWRITE(WD1772_TAG, wd1772_t, read, write)
115	123	AM_RANGE(0x8000, 0xffff) AM_ROM AM_REGION(M6502_TAG, 0)
116	124	ADDRESS_MAP_END
117	125
r19556	r19557
122	130
123	131	WRITE_LINE_MEMBER( base_c1581_device::cnt_w )
124	132	{
125		// fast serial clock out
126	133	m_cnt_out = state;
127	134
128		set_iec_srq();
	135	update_iec();
129	136	}
130	137
131	138	WRITE_LINE_MEMBER( base_c1581_device::sp_w )
132	139	{
133		// fast serial data out
134	140	m_sp_out = state;
135	141
136		set_iec_data();
	142	update_iec();
137	143	}
138	144
139	145	READ8_MEMBER( base_c1581_device::cia_pa_r )
140	146	{
141	147	/*
142	148
143		bit     description
	149	bit     description
144	150
145		PA0
146		PA1     /RDY
147		PA2
148		PA3     DEV# SEL (SW1)
149		PA4     DEV# SEL (SW1)
150		PA5
151		PA6
152		PA7     /DISK CHNG
	151	PA0
	152	PA1     /RDY
	153	PA2
	154	PA3     DEV# SEL (SW1)
	155	PA4     DEV# SEL (SW1)
	156	PA5
	157	PA6
	158	PA7     /DISK CHNG
153	159
154		*/
	160	*/
155	161
156	162	UINT8 data = 0;
157	163
158	164	// ready
159		data |= !(floppy_drive_get_flag_state(m_image, FLOPPY_DRIVE_READY) == FLOPPY_DRIVE_READY) << 1;
	165	data |= !m_floppy->ready_r() << 1;
160	166
161	167	// device number
162	168	data |= (m_address - 8) << 3;
163	169
164	170	// disk change
165		data |= floppy_dskchg_r(m_image) << 7;
	171	data |= m_floppy->dskchg_r() << 7;
166	172
167	173	return data;
168	174	}
r19556	r19557
171	177	{
172	178	/*
173	179
174		bit     description
	180	bit     description
175	181
176		PA0     SIDE0
177		PA1
178		PA2     /MOTOR
179		PA3
180		PA4
181		PA5     POWER LED
182		PA6     ACT LED
183		PA7
	182	PA0     SIDE0
	183	PA1
	184	PA2     /MOTOR
	185	PA3
	186	PA4
	187	PA5     POWER LED
	188	PA6     ACT LED
	189	PA7
184	190
185		*/
	191	*/
186	192
187		// side 0
188		wd17xx_set_side(m_fdc, !BIT(data, 0));
	193	// side select
	194	m_floppy->ss_w(BIT(data, 0));
189	195
190	196	// motor
191		int motor = BIT(data, 2);
192		floppy_mon_w(m_image, motor);
193		floppy_drive_set_ready_state(m_image, !motor, 1);
	197	m_floppy->mon_w(BIT(data, 2));
194	198
195	199	// power led
196	200	output_set_led_value(LED_POWER, BIT(data, 5));
r19556	r19557
203	207	{
204	208	/*
205	209
206		bit     description
	210	bit     description
207	211
208		PB0     DATA IN
209		PB1
210		PB2     CLK IN
211		PB3
212		PB4
213		PB5
214		PB6     /WPRT
215		PB7     ATN IN
	212	PB0     DATA IN
	213	PB1
	214	PB2     CLK IN
	215	PB3
	216	PB4
	217	PB5
	218	PB6     /WPRT
	219	PB7     ATN IN
216	220
217		*/
	221	*/
218	222
219	223	UINT8 data = 0;
220	224
r19556	r19557
225	229	data |= !m_bus->clk_r() << 2;
226	230
227	231	// write protect
228		data |= !floppy_wpt_r(m_image) << 6;
	232	data |= !m_floppy->wpt_r() << 6;
229	233
230	234	// attention in
231	235	data |= !m_bus->atn_r() << 7;
r19556	r19557
237	241	{
238	242	/*
239	243
240		bit     description
	244	bit     description
241	245
242		PB0
243		PB1     DATA OUT
244		PB2
245		PB3     CLK OUT
246		PB4     ATN ACK
247		PB5     FAST SER DIR
248		PB6
249		PB7
	246	PB0
	247	PB1     DATA OUT
	248	PB2
	249	PB3     CLK OUT
	250	PB4     ATN ACK
	251	PB5     FAST SER DIR
	252	PB6
	253	PB7
250	254
251		*/
	255	*/
252	256
253	257	// data out
254	258	m_data_out = BIT(data, 1);
r19556	r19557
260	264	m_atn_ack = BIT(data, 4);
261	265
262	266	// fast serial direction
263		int fast_ser_dir = BIT(data, 5);
	267	m_fast_ser_dir = BIT(data, 5);
264	268
265		if (m_fast_ser_dir != fast_ser_dir)
266		{
267		m_fast_ser_dir = fast_ser_dir;
268
269		set_iec_data();
270		set_iec_srq();
271
272		m_cia->cnt_w(m_fast_ser_dir || m_bus->srq_r());
273		m_cia->sp_w(m_fast_ser_dir || m_bus->data_r());
274		}
	269	update_iec();
275	270	}
276	271
277	272	static MOS8520_INTERFACE( cia_intf )
r19556	r19557
288	283
289	284
290	285	//-------------------------------------------------
291		//  wd17xx_interface fdc_intf
	286	//  SLOT_INTERFACE( c1581_floppies )
292	287	//-------------------------------------------------
293	288
294		static const wd17xx_interface fdc_intf =
295		{
296		DEVCB_LINE_GND,
297		DEVCB_NULL,
298		DEVCB_NULL,
299		{ FLOPPY_0, NULL, NULL, NULL }
300		};
	289	static SLOT_INTERFACE_START( c1581_floppies )
	290	SLOT_INTERFACE( "35dd", FLOPPY_35_DD ) // Chinon F-354-E
	291	SLOT_INTERFACE_END
301	292
302	293
303	294	//-------------------------------------------------
304		//  LEGACY_FLOPPY_OPTIONS( c1581 )
	295	//  FLOPPY_FORMATS( c1581_device::floppy_formats )
305	296	//-------------------------------------------------
306	297
307		static LEGACY_FLOPPY_OPTIONS_START( c1581 )
308		LEGACY_FLOPPY_OPTION( c1581, "d81", "Commodore 1581 Disk Image", d81_dsk_identify, d81_dsk_construct, NULL, NULL )
309		LEGACY_FLOPPY_OPTIONS_END
	298	FLOPPY_FORMATS_MEMBER( base_c1581_device::floppy_formats )
	299	FLOPPY_D81_FORMAT
	300	FLOPPY_FORMATS_END
310	301
311	302
312	303	//-------------------------------------------------
313		//  floppy_interface c1581_floppy_interface
314		//-------------------------------------------------
315
316		static const floppy_interface c1581_floppy_interface =
317		{
318		DEVCB_NULL,
319		DEVCB_NULL,
320		DEVCB_NULL,
321		DEVCB_NULL,
322		DEVCB_NULL,
323		FLOPPY_STANDARD_3_5_DSDD,
324		LEGACY_FLOPPY_OPTIONS_NAME(c1581),
325		"floppy_3_5",
326		NULL
327		};
328
329
330		//-------------------------------------------------
331	304	//  MACHINE_DRIVER( c1581 )
332	305	//-------------------------------------------------
333	306
r19556	r19557
336	309	MCFG_CPU_PROGRAM_MAP(c1581_mem)
337	310
338	311	MCFG_MOS8520_ADD(M8520_TAG, XTAL_16MHz/8, 0, cia_intf)
339		MCFG_WD1770_ADD(WD1770_TAG, /*XTAL_16MHz/2,*/ fdc_intf)
	312	MCFG_WD1772x_ADD(WD1772_TAG, XTAL_16MHz/2)
340	313
341		MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, c1581_floppy_interface)
	314	MCFG_FLOPPY_DRIVE_ADD(WD1772_TAG":0", c1581_floppies, "35dd", 0, base_c1581_device::floppy_formats)
342	315	MACHINE_CONFIG_END
343	316
344	317
r19556	r19557
355	328
356	329
357	330	//**************************************************************************
358		//  INLINE HELPERS
359		//**************************************************************************
360
361		//-------------------------------------------------
362		//  base_c1581_device - constructor
363		//-------------------------------------------------
364
365		inline void base_c1581_device::set_iec_data()
366		{
367		int atn = m_bus->atn_r();
368		int data = !m_data_out && !(m_atn_ack && !atn);
369
370		// fast serial data
371		if (m_fast_ser_dir) data &= m_sp_out;
372
373		m_bus->data_w(this, data);
374		}
375
376
377		//-------------------------------------------------
378		//  base_c1581_device - constructor
379		//-------------------------------------------------
380
381		inline void base_c1581_device::set_iec_srq()
382		{
383		int srq = 1;
384
385		// fast serial clock
386		if (m_fast_ser_dir) srq &= m_cnt_out;
387
388		m_bus->srq_w(this, srq);
389		}
390
391
392
393		//**************************************************************************
394	331	//  LIVE DEVICE
395	332	//**************************************************************************
396	333
r19556	r19557
399	336	//-------------------------------------------------
400	337
401	338	base_c1581_device::base_c1581_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant)
402		: device_t(mconfig, type, name, tag, owner, clock),
403		device_cbm_iec_interface(mconfig, *this),
404		m_maincpu(*this, M6502_TAG),
405		m_cia(*this, M8520_TAG),
406		m_fdc(*this, WD1770_TAG),
407		m_image(*this, FLOPPY_0),
408		m_variant(variant)
	339	: device_t(mconfig, type, name, tag, owner, clock),
	340	device_cbm_iec_interface(mconfig, *this),
	341	m_maincpu(*this, M6502_TAG),
	342	m_cia(*this, M8520_TAG),
	343	m_fdc(*this, WD1772_TAG),
	344	m_floppy(*this, WD1772_TAG":0:35dd"),
	345	m_data_out(0),
	346	m_atn_ack(0),
	347	m_fast_ser_dir(0),
	348	m_sp_out(1),
	349	m_cnt_out(1),
	350	m_variant(variant)
409	351	{
410	352	}
411	353
r19556	r19557
447	389
448	390	void base_c1581_device::device_reset()
449	391	{
450		m_maincpu->reset();
	392	m_maincpu->reset();
451	393
452		m_cia->reset();
	394	m_cia->reset();
	395	m_fdc->reset();
453	396
454		wd17xx_mr_w(m_fdc, 0);
455		wd17xx_mr_w(m_fdc, 1);
	397	m_fdc->set_floppy(m_floppy);
	398	m_fdc->dden_w(0);
456	399
457	400	m_sp_out = 1;
458	401	m_cnt_out = 1;
	402
	403	update_iec();
459	404	}
460	405
461	406
r19556	r19557
465	410
466	411	void base_c1581_device::cbm_iec_srq(int state)
467	412	{
468		m_cia->cnt_w(m_fast_ser_dir || state);
	413	update_iec();
469	414	}
470	415
471	416
r19556	r19557
475	420
476	421	void base_c1581_device::cbm_iec_atn(int state)
477	422	{
478		m_cia->flag_w(state);
479
480		set_iec_data();
	423	update_iec();
481	424	}
482	425
483	426
r19556	r19557
487	430
488	431	void base_c1581_device::cbm_iec_data(int state)
489	432	{
490		m_cia->sp_w(m_fast_ser_dir || state);
	433	update_iec();
491	434	}
492	435
493	436
r19556	r19557
502	445	device_reset();
503	446	}
504	447	}
	448
	449
	450	//-------------------------------------------------
	451	//  update_iec -
	452	//-------------------------------------------------
	453
	454	void base_c1581_device::update_iec()
	455	{
	456	int atn = m_bus->atn_r();
	457
	458	m_cia->cnt_w(m_fast_ser_dir || m_bus->srq_r());
	459	m_cia->sp_w(m_fast_ser_dir || m_bus->data_r());
	460	m_cia->flag_w(atn);
	461
	462	// serial data
	463	int data = !m_data_out && !(m_atn_ack && !atn);
	464
	465	if (m_fast_ser_dir) data &= m_sp_out;
	466
	467	m_bus->data_w(this, data);
	468
	469	// fast clock
	470	int srq = 1;
	471
	472	if (m_fast_ser_dir) srq &= m_cnt_out;
	473
	474	m_bus->srq_w(this, srq);
	475	}

trunk/src/mess/machine/c1581.h

r19556	r19557
15	15
16	16	#include "emu.h"
17	17	#include "cpu/m6502/m6502.h"
18		#include "imagedev/flopdrv.h"
19	18	#include "formats/d81_dsk.h"
20	19	#include "machine/cbmiec.h"
21	20	#include "machine/mos6526.h"
22		#include "machine/wd17xx.h"
	21	#include "machine/wd_fdc.h"
23	22
24	23
25	24
r19556	r19557
27	26	//  MACROS / CONSTANTS
28	27	//**************************************************************************
29	28
30		#define C1581_TAG         "c1581"
	29	#define C1581_TAG           "c1581"
31	30
32	31
33	32
r19556	r19557
38	37	// ======================> base_c1581_device
39	38
40	39	class base_c1581_device :  public device_t,
41		public device_cbm_iec_interface
	40	public device_cbm_iec_interface
42	41	{
43	42
44	43	public:
45		// construction/destruction
46		base_c1581_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant);
	44	// construction/destruction
	45	base_c1581_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant);
47	46
48	47	enum
49	48	{
r19556	r19557
63	62	DECLARE_READ8_MEMBER( cia_pb_r );
64	63	DECLARE_WRITE8_MEMBER( cia_pb_w );
65	64
	65	DECLARE_FLOPPY_FORMATS( floppy_formats );
	66
66	67	protected:
67		// device-level overrides
68		virtual void device_config_complete();
69		virtual void device_start();
	68	// device-level overrides
	69	virtual void device_config_complete();
	70	virtual void device_start();
70	71	virtual void device_reset();
71	72
72	73	// device_cbm_iec_interface overrides
r19556	r19557
75	76	virtual void cbm_iec_data(int state);
76	77	virtual void cbm_iec_reset(int state);
77	78
78		inline void set_iec_data();
79		inline void set_iec_srq();
	79	void update_iec();
80	80
81	81	required_device<cpu_device> m_maincpu;
82	82	required_device<mos6526_device> m_cia;
83		required_device<wd1770_device> m_fdc;
84		required_device<legacy_floppy_image_device> m_image;
	83	required_device<wd1772_t> m_fdc;
	84	required_device<floppy_image_device> m_floppy;
85	85
86		int m_data_out;            // serial data out
87		int m_atn_ack;            // attention acknowledge
88		int m_fast_ser_dir;         // fast serial direction
89		int m_sp_out;            // fast serial data out
90		int m_cnt_out;            // fast serial clock out
	86	int m_data_out;             // serial data out
	87	int m_atn_ack;              // attention acknowledge
	88	int m_fast_ser_dir;         // fast serial direction
	89	int m_sp_out;               // fast serial data out
	90	int m_cnt_out;              // fast serial clock out
91	91
92	92	int m_variant;
93	93	};
r19556	r19557
98	98	class c1563_device :  public base_c1581_device
99	99	{
100	100	public:
101		// construction/destruction
102		c1563_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
	101	// construction/destruction
	102	c1563_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
103	103	};
104	104
105	105
r19556	r19557
108	108	class c1581_device :  public base_c1581_device
109	109	{
110	110	public:
111		// construction/destruction
112		c1581_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
	111	// construction/destruction
	112	c1581_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
113	113	};
114	114
115	115

Previous

199869 Revisions

Next

---

© 1997-2024 The MAME Team