1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// license:BSD-3-Clause
// copyright-holders:Nathan Woods
/*********************************************************************
formats/pc_dsk.c
PC disk images
*********************************************************************/
#include "formats/pc_dsk.h"
#include "ioprocs.h"
#include <cstring>
pc_format::pc_format() : upd765_format(formats)
{
}
const char *pc_format::name() const
{
return "pc";
}
const char *pc_format::description() const
{
return "PC floppy disk image";
}
const char *pc_format::extensions() const
{
return "dsk,ima,img,ufi,360";
}
int pc_format::identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants)
{
uint64_t size;
if (io.length(size)) {
return 0;
}
/* some 360K images have a 512-byte header */
if (size == 368640 + 0x200) {
file_header_skip_bytes = 0x200;
}
/* Disk Copy 4.2 images have an 84-byte header */
if (size == 1474560 + 84) {
file_header_skip_bytes = 84;
}
/* some 1.44MB images have a 1024-byte footer */
if (size == 1474560 + 0x400) {
file_footer_skip_bytes = 0x400;
}
return upd765_format::identify(io, form_factor, variants);
}
const pc_format::format pc_format::formats[] = {
{ /* 160K 5 1/4 inch double density single sided */
floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM,
2000, 8, 40, 1, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 320K 5 1/4 inch double density */
floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM,
2000, 8, 40, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 180K 5 1/4 inch double density single sided */
floppy_image::FF_525, floppy_image::SSDD, floppy_image::MFM,
2000, 9, 40, 1, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 360K 5 1/4 inch double density */
floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM,
2000, 9, 40, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 360K 5 1/4 inch double density, 41 tracks */
floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM,
2000, 9, 41, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 360K 5 1/4 inch double density, 42 tracks */
floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM,
2000, 9, 42, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 400K 5 1/4 inch double density - gaps unverified */
floppy_image::FF_525, floppy_image::DSDD, floppy_image::MFM,
2000, 10, 40, 2, 512, {}, 1, {}, 80, 50, 22, 36
},
{ /* 720K 5 1/4 inch quad density - gaps unverified */
floppy_image::FF_525, floppy_image::DSQD, floppy_image::MFM,
2000, 9, 80, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 1200K 5 1/4 inch high density */
floppy_image::FF_525, floppy_image::DSHD, floppy_image::MFM,
1200, 15, 80, 2, 512, {}, 1, {}, 80, 50, 22, 84
},
{ /* 720K 3 1/2 inch double density */
floppy_image::FF_35, floppy_image::DSDD, floppy_image::MFM,
2000, 9, 80, 2, 512, {}, 1, {}, 80, 50, 22, 80
},
{ /* 1200K 3 1/2 inch high density (japanese variant) - gaps unverified */
floppy_image::FF_35, floppy_image::DSHD, floppy_image::MFM,
1000, 15, 80, 2, 512, {}, 1, {}, 80, 50, 22, 84
},
{ /* 1440K 3 1/2 inch high density */
floppy_image::FF_35, floppy_image::DSHD, floppy_image::MFM,
1000, 18, 80, 2, 512, {}, 1, {}, 80, 50, 22, 108
},
{ /* Microsoft DMF 1680K 3 1/2 inch high density - gaps unverified */
floppy_image::FF_35, floppy_image::DSHD, floppy_image::MFM,
1000, 21, 80, 2, 512, {}, 1, {}, 80, 50, 22, 0xc
},
{ /* 2880K 3 1/2 inch extended density - gaps unverified */
floppy_image::FF_35, floppy_image::DSED, floppy_image::MFM,
500, 36, 80, 2, 512, {}, 1, {}, 80, 50, 41, 80
},
{}
};
const floppy_format_type FLOPPY_PC_FORMAT = &floppy_image_format_creator<pc_format>;
|