1 /* 2 * vdrive.h - Virtual disk-drive implementation. 3 * 4 * Written by 5 * Andreas Boose <viceteam@t-online.de> 6 * 7 * This file is part of VICE, the Versatile Commodore Emulator. 8 * See README for copyright notice. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 23 * 02111-1307 USA. 24 * 25 */ 26 27 #ifndef VICE_VDRIVE_H 28 #define VICE_VDRIVE_H 29 30 #include "types.h" 31 #include "vdrive-dir.h" 32 33 /* temporarily until the 4000 support is not safe */ 34 #define VDRIVE_IMAGE_FORMAT_4000_TEST (vdrive->image_format == VDRIVE_IMAGE_FORMAT_4000) 35 36 /* High level disk formats. 37 They can be different than the disk image type. */ 38 #define VDRIVE_IMAGE_FORMAT_1541 0 39 #define VDRIVE_IMAGE_FORMAT_1571 1 40 #define VDRIVE_IMAGE_FORMAT_1581 2 41 #define VDRIVE_IMAGE_FORMAT_8050 3 /* Dual Disk Drive */ 42 #define VDRIVE_IMAGE_FORMAT_8250 4 /* Dual Disk Drive */ 43 #define VDRIVE_IMAGE_FORMAT_2040 5 /* Dual Disk Drive */ 44 #define VDRIVE_IMAGE_FORMAT_4000 6 45 46 #define BUFFER_NOT_IN_USE 0 47 #define BUFFER_DIRECTORY_READ 1 48 #define BUFFER_SEQUENTIAL 2 49 #define BUFFER_MEMORY_BUFFER 3 50 #define BUFFER_RELATIVE 4 51 #define BUFFER_COMMAND_CHANNEL 5 52 53 #define WRITE_BLOCK 512 54 55 #define SET_LO_HI(p, val) \ 56 do { \ 57 *((p)++) = (val) & 0xff; \ 58 *((p)++) = ((val) >> 8) & 0xff; \ 59 } while (0) 60 61 #define DRIVE_RAMSIZE 0x400 62 63 #define BAM_MAXSIZE (33 * 256) 64 65 /* Serial Error Codes. */ 66 #define SERIAL_OK 0 67 #define SERIAL_WRITE_TIMEOUT 1 68 #define SERIAL_READ_TIMEOUT 2 69 #define SERIAL_FILE_NOT_FOUND 64 70 #define SERIAL_NO_DEVICE 128 71 72 #define SERIAL_ERROR (2) 73 #define SERIAL_EOF (64) 74 75 typedef struct bufferinfo_s { 76 unsigned int mode; /* Mode on this buffer */ 77 unsigned int readmode; /* Is this channel for reading or writing */ 78 uint8_t *buffer; /* Use this to save data */ 79 uint8_t *slot; /* Save data for directory-slot */ 80 unsigned int bufptr; /* Use this to save/read data to disk */ 81 unsigned int track; /* which track is allocated for this sector */ 82 unsigned int sector; /* (for write files only) */ 83 unsigned int length; /* Directory-read length */ 84 unsigned int record; /* Current record */ 85 86 /* REL file information stored in buffers since we can have more than 87 one open */ 88 uint8_t *side_sector; 89 /* location of the side sectors */ 90 uint8_t *side_sector_track; 91 uint8_t *side_sector_sector; 92 93 uint8_t *super_side_sector; 94 /* location of the super side sector */ 95 uint8_t super_side_sector_track; 96 uint8_t super_side_sector_sector; 97 98 uint8_t *buffer_next; /* next buffer for rel file */ 99 unsigned int track_next; /* track for the next sector */ 100 unsigned int sector_next; /* sector for the next sector */ 101 102 unsigned int record_max; /* Max rel file record, inclusive */ 103 unsigned int record_next; /* Buffer pointer to beginning of next record */ 104 uint8_t needsupdate; /* true if the current sector needs to be 105 written (from REL write) */ 106 uint8_t super_side_sector_needsupdate; /* similar to above */ 107 uint8_t *side_sector_needsupdate; 108 109 vdrive_dir_context_t dir; /* directory listing context or directory entry */ 110 } bufferinfo_t; 111 112 struct disk_image_s; 113 114 /* Run-time data struct for each drive. */ 115 typedef struct vdrive_s { 116 struct disk_image_s *image; 117 118 /* Current image file */ 119 unsigned int mode; /* Read/Write */ 120 unsigned int image_format; /* 1541/71/81 */ 121 unsigned int unit; 122 123 unsigned int Bam_Track; 124 unsigned int Bam_Sector; 125 unsigned int bam_name; /* Offset from start of BAM to disk name. */ 126 unsigned int bam_id; /* Offset from start of BAM to disk ID. */ 127 unsigned int Header_Track; /* Directory header location */ 128 unsigned int Header_Sector; 129 unsigned int Dir_Track; /* First directory sector location */ 130 unsigned int Dir_Sector; 131 unsigned int num_tracks; 132 /* CBM partition first and last track (1581) 133 * Part_Start is 1, Part_End = num_tracks if no partition is used 134 */ 135 unsigned int Part_Start, Part_End; 136 137 unsigned int bam_size; 138 uint8_t *bam; 139 bufferinfo_t buffers[16]; 140 141 /* Memory read command buffer. */ 142 uint8_t mem_buf[256]; 143 unsigned int mem_length; 144 145 /* removed side sector data and placed it in buffer structure */ 146 /* BYTE *side_sector; */ 147 148 uint8_t ram[0x800]; 149 } vdrive_t; 150 151 /* Actually, serial-code errors ... */ 152 153 #define FLOPPY_COMMAND_OK 0 154 #define FLOPPY_ERROR 2 155 156 157 /* Return values used around. */ 158 159 #define FD_OK 0 160 #define FD_EXIT 1 /* -1,0, 1 are fixed values */ 161 162 #define FD_NOTREADY -2 163 #define FD_CHANGED -3 /* File has changed on disk */ 164 #define FD_NOTRD -4 165 #define FD_NOTWRT -5 166 #define FD_WRTERR -6 167 #define FD_RDERR -7 168 #define FD_INCOMP -8 /* DOS Format Mismatch */ 169 #define FD_BADIMAGE -9 /* ID mismatch (Disk or tape) */ 170 #define FD_BADNAME -10 /* Illegal filename */ 171 #define FD_BADVAL -11 /* Illegal value */ 172 #define FD_BADDEV -12 173 #define FD_BAD_TS -13 /* Track or sector */ 174 #define FD_BAD_TRKNUM -14 /* Illegal track number */ 175 #define FD_BAD_SECNUM -15 /* Illegal sector number */ 176 177 178 #define CHK_NUM 0 179 #define CHK_RDY 1 180 181 /* ------------------------------------------------------------------------- */ 182 183 extern void vdrive_init(void); 184 extern int vdrive_device_setup(vdrive_t *vdrive, unsigned int unit); 185 extern void vdrive_device_shutdown(vdrive_t *vdrive); 186 extern int vdrive_attach_image(struct disk_image_s *image, unsigned int unit, vdrive_t *vdrive); 187 extern void vdrive_detach_image(struct disk_image_s *image, unsigned int unit, vdrive_t *vdrive); 188 extern void vdrive_close_all_channels(vdrive_t *vdrive); 189 extern int vdrive_get_max_sectors(vdrive_t *vdrive, unsigned int track); 190 extern void vdrive_get_last_read(unsigned int *track, unsigned int *sector, uint8_t **buffer); 191 extern void vdrive_set_last_read(unsigned int track, unsigned int sector, uint8_t *buffer); 192 193 extern void vdrive_alloc_buffer(struct bufferinfo_s *p, int mode); 194 extern void vdrive_free_buffer(struct bufferinfo_s *p); 195 extern void vdrive_set_disk_geometry(vdrive_t *vdrive); 196 extern int vdrive_read_sector(vdrive_t *vdrive, uint8_t *buf, unsigned int track, unsigned int sector); 197 extern int vdrive_write_sector(vdrive_t *vdrive, const uint8_t *buf, unsigned int track, unsigned int sector); 198 199 #endif 200