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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/////////////////////////////////////////////////////////////////////////
// $Id: floppy.h,v 1.29 2006/05/27 15:54:48 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef BX_IODEV_FLOPPY_H
#define BX_IODEV_FLOPPY_H
#define FROM_FLOPPY 10
#define TO_FLOPPY 11
#if BX_USE_FD_SMF
# define BX_FD_SMF static
# define BX_FD_THIS theFloppyController->
#else
# define BX_FD_SMF
# define BX_FD_THIS this->
#endif
typedef struct {
int fd; /* file descriptor of floppy image file */
unsigned sectors_per_track; /* number of sectors/track */
unsigned sectors; /* number of formatted sectors on diskette */
unsigned tracks; /* number of tracks */
unsigned heads; /* number of heads */
unsigned type;
unsigned write_protected;
unsigned char raw_floppy_win95;
#ifdef WIN32
unsigned char raw_floppy_win95_drv;
#endif
} floppy_t;
class bx_floppy_ctrl_c : public bx_floppy_stub_c {
public:
bx_floppy_ctrl_c();
virtual ~bx_floppy_ctrl_c();
virtual void init(void);
virtual void reset(unsigned type);
virtual unsigned set_media_status(unsigned drive, unsigned status);
virtual unsigned get_media_status(unsigned drive);
#if BX_SUPPORT_SAVE_RESTORE
virtual void register_state(void);
#endif
private:
struct {
Bit8u data_rate;
Bit8u command[10]; /* largest command size ??? */
Bit8u command_index;
Bit8u command_size;
bx_bool command_complete;
Bit8u pending_command;
bx_bool multi_track;
bx_bool pending_irq;
Bit8u reset_sensei;
Bit8u format_count;
Bit8u format_fillbyte;
Bit8u result[10];
Bit8u result_index;
Bit8u result_size;
Bit8u DOR; // Digital Ouput Register
Bit8u TDR; // Tape Drive Register
Bit8u cylinder[4]; // really only using 2 drives
Bit8u head[4]; // really only using 2 drives
Bit8u sector[4]; // really only using 2 drives
Bit8u eot[4]; // really only using 2 drives
bx_bool TC; // Terminal Count status from DMA controller
/* MAIN STATUS REGISTER
* b7: MRQ: main request 1=data register ready 0=data register not ready
* b6: DIO: data input/output:
* 1=controller->CPU (ready for data read)
* 0=CPU->controller (ready for data write)
* b5: NDMA: non-DMA mode: 1=controller not in DMA modes
* 0=controller in DMA mode
* b4: BUSY: instruction(device busy) 1=active 0=not active
* b3-0: ACTD, ACTC, ACTB, ACTA:
* drive D,C,B,A in positioning mode 1=active 0=not active
*/
Bit8u main_status_reg;
Bit8u status_reg0;
Bit8u status_reg1;
Bit8u status_reg2;
Bit8u status_reg3;
// drive field allows up to 4 drives, even though probably only 2 will
// ever be used.
floppy_t media[4];
unsigned num_supported_floppies;
Bit8u floppy_buffer[512+2]; // 2 extra for good measure
unsigned floppy_buffer_index;
int floppy_timer_index;
bx_bool media_present[4];
Bit8u device_type[4];
Bit8u DIR[4]; // Digital Input Register:
// b7: 0=diskette is present and has not been changed
// 1=diskette missing or changed
bx_bool non_dma; // non-DMA mode
bx_bool lock; // FDC lock status
Bit8u SRT; // step rate time
Bit8u HUT; // head unload time
Bit8u HLT; // head load time
Bit8u config; // configure byte #1
Bit8u pretrk; // precompensation track
Bit8u perp_mode; // perpendicular mode
int statusbar_id[2]; // IDs of the status LEDs
} s; // state information
static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#if !BX_USE_FD_SMF
Bit32u read(Bit32u address, unsigned io_len);
void write(Bit32u address, Bit32u value, unsigned io_len);
#endif
BX_FD_SMF void dma_write(Bit8u *data_byte);
BX_FD_SMF void dma_read(Bit8u *data_byte);
BX_FD_SMF void floppy_command(void);
BX_FD_SMF void floppy_xfer(Bit8u drive, Bit32u offset, Bit8u *buffer, Bit32u bytes, Bit8u direction);
BX_FD_SMF void raise_interrupt(void);
BX_FD_SMF void lower_interrupt(void);
BX_FD_SMF void enter_idle_phase(void);
BX_FD_SMF void enter_result_phase(void);
BX_FD_SMF Bit32u calculate_step_delay(Bit8u drive, Bit8u new_cylinder);
BX_FD_SMF void reset_changeline(void);
static void timer_handler(void *);
public:
BX_FD_SMF void timer(void);
BX_FD_SMF void increment_sector(void);
BX_FD_SMF bx_bool evaluate_media(Bit8u devtype, Bit8u type, char *path, floppy_t *floppy);
};
#ifdef WIN32
// used for direct floppy access in Win95
#define VWIN32_DIOC_DOS_IOCTL 1
#define VWIN32_DIOC_DOS_INT25 2
#define VWIN32_DIOC_DOS_INT26 3
typedef struct _DIOC_REGISTERS {
DWORD reg_EBX;
DWORD reg_EDX;
DWORD reg_ECX;
DWORD reg_EAX;
DWORD reg_EDI;
DWORD reg_ESI;
DWORD reg_Flags;
} DIOC_REGISTERS, *PDIOC_REGISTERS;
#pragma pack(push, 1)
typedef struct _BLOCK_DEV_PARAMS {
BYTE features;
BYTE dev_type;
WORD attribs;
WORD cylinders;
BYTE media_type;
// BPB
WORD bytes_per_sector;
BYTE sect_per_cluster;
WORD reserved_sectors;
BYTE fats;
WORD root_entries;
WORD tot_sectors;
BYTE media_id;
WORD sects_per_fat;
WORD sects_per_track;
WORD num_heads;
WORD hidden_sectors;
BYTE remainder[5];
} BLOCK_DEV_PARAMS, *PBLOCK_DEV_PARAMS;
#pragma pack(pop)
#endif /* WIN32 */
#endif
|
