Cleaned up disc_86f.c a bit.
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OBattler
117
src/disc_86f.c
117
src/disc_86f.c
@@ -8,16 +8,6 @@
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#define MAX_SECTORS 256
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typedef struct
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{
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uint8_t c, h, r, n;
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int rate;
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uint8_t *data;
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} sector_t;
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static sector_t d86f_data[2][2][MAX_SECTORS];
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static int d86f_count[2][2];
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int d86f_cur_track_pos[2] = {0, 0};
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enum
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@@ -45,7 +35,7 @@ static int d86f_drive;
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static int d86f_sector[2] = {0, 0};
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static int d86f_n[2] = {0, 0};
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static uint8_t d86f_fill[2] = {0, 0};
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static int cur_sector[2]/*, cur_byte[2]*/;
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static int cur_sector[2];
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static int index_count[2];
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static int format_sector_count[2] = {0, 0};
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@@ -58,7 +48,6 @@ static struct
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uint8_t track_flags;
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uint8_t track_in_file;
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uint32_t track_pos[256];
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uint16_t raw_track_size;
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uint32_t file_size;
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} d86f[2];
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@@ -75,6 +64,43 @@ void d86f_writeback(int drive, int track);
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static uint16_t CRCTable[256];
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/* 0 = MFM, 1 = FM, 2 = MFM perpendicular, 3 = reserved */
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/* 4 = ISO, 0 = IBM */
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int d86f_media_type = 0;
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/* Bits 0-3 define byte type, bit 5 defines whether it is a per-track (0) or per-sector (1) byte, if bit 7 is set, the byte is the index hole. */
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#define BYTE_GAP0 0x00
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#define BYTE_GAP1 0x10
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#define BYTE_GAP4 0x20
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#define BYTE_GAP2 0x40
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#define BYTE_GAP3 0x50
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#define BYTE_I_SYNC 0x01
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#define BYTE_ID_SYNC 0x41
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#define BYTE_DATA_SYNC 0x51
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#define BYTE_IAM_SYNC 0x02
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#define BYTE_IDAM_SYNC 0x42
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#define BYTE_DATAAM_SYNC 0x52
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#define BYTE_IAM 0x03
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#define BYTE_IDAM 0x43
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#define BYTE_DATAAM 0x53
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#define BYTE_ID 0x44
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#define BYTE_DATA 0x54
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#define BYTE_ID_CRC 0x45
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#define BYTE_DATA_CRC 0x55
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#define BYTE_INDEX_HOLE 0x80 /* 1 = index hole, 0 = regular byte */
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#define BYTE_IS_SECTOR 0x40 /* 1 = per-sector, 0 = per-track */
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#define BYTE_IS_POST_TRACK 0x20 /* 1 = after all sectors, 0 = before or during all sectors */
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#define BYTE_IS_DATA 0x10 /* 1 = data, 0 = id */
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#define BYTE_TYPE 0x0F /* 5 = crc, 4 = data, 3 = address mark, 2 = address mark sync, 1 = sync, 0 = gap */
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#define BYTE_TYPE_GAP 0x00
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#define BYTE_TYPE_SYNC 0x01
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#define BYTE_TYPE_AM_SYNC 0x02
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#define BYTE_TYPE_AM 0x03
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#define BYTE_TYPE_DATA 0x04
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#define BYTE_TYPE_CRC 0x05
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static void d86f_setupcrc(uint16_t poly, uint16_t rvalue)
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{
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int c = 256, bc;
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@@ -274,47 +300,6 @@ void d86f_close(int drive)
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d86f[drive].f = NULL;
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}
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char track_layout[2][2][25512];
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int id_positions[2][2][MAX_SECTORS];
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/* 0 = MFM, 1 = FM, 2 = MFM perpendicular, 3 = reserved */
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/* 4 = ISO, 0 = IBM */
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int d86f_media_type = 0;
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/* Bits 0-3 define byte type, bit 5 defines whether it is a per-track (0) or per-sector (1) byte, if bit 7 is set, the byte is the index hole. */
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#define BYTE_GAP0 0x00
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#define BYTE_GAP1 0x10
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#define BYTE_GAP4 0x20
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#define BYTE_GAP2 0x40
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#define BYTE_GAP3 0x50
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#define BYTE_I_SYNC 0x01
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#define BYTE_ID_SYNC 0x41
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#define BYTE_DATA_SYNC 0x51
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#define BYTE_IAM_SYNC 0x02
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#define BYTE_IDAM_SYNC 0x42
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#define BYTE_DATAAM_SYNC 0x52
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#define BYTE_IAM 0x03
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#define BYTE_IDAM 0x43
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#define BYTE_DATAAM 0x53
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#define BYTE_ID 0x44
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#define BYTE_DATA 0x54
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#define BYTE_ID_CRC 0x45
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#define BYTE_DATA_CRC 0x55
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#define BYTE_INDEX_HOLE 0x80 /* 1 = index hole, 0 = regular byte */
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#define BYTE_IS_SECTOR 0x40 /* 1 = per-sector, 0 = per-track */
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#define BYTE_IS_POST_TRACK 0x20 /* 1 = after all sectors, 0 = before or during all sectors */
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#define BYTE_IS_DATA 0x10 /* 1 = data, 0 = id */
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#define BYTE_TYPE 0x0F /* 5 = crc, 4 = data, 3 = address mark, 2 = address mark sync, 1 = sync, 0 = gap */
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#define BYTE_TYPE_GAP 0x00
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#define BYTE_TYPE_SYNC 0x01
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#define BYTE_TYPE_AM_SYNC 0x02
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#define BYTE_TYPE_AM 0x03
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#define BYTE_TYPE_DATA 0x04
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#define BYTE_TYPE_CRC 0x05
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int d86f_get_sides(int drive)
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{
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return (d86f[drive].disk_flags & 8) ? 2 : 1;
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@@ -382,8 +367,6 @@ void d86f_seek(int drive, int track)
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/* Track does not exist in the image, initialize it as unformatted. */
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d86f[drive].track_in_file = 0;
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d86f[drive].track_flags = 0x0A; /* 300 rpm, MFM, 250 kbps */
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d86f[drive].raw_track_size = 6250;
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return;
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}
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@@ -393,19 +376,17 @@ void d86f_seek(int drive, int track)
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fread(&(d86f[drive].track_flags), 1, 1, d86f[drive].f);
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d86f[drive].raw_track_size = d86f_get_raw_size(drive);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 2, SEEK_SET);
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fread(d86f[drive].track_layout[0], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fread(d86f[drive].track_layout[0], 1, d86f_get_raw_size(drive), d86f[drive].f);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 25002, SEEK_SET);
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fread(d86f[drive].track_data[0], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fread(d86f[drive].track_data[0], 1, d86f_get_raw_size(drive), d86f[drive].f);
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if (d86f_get_sides(drive) == 2)
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{
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 50002, SEEK_SET);
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fread(d86f[drive].track_layout[1], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fread(d86f[drive].track_layout[1], 1, d86f_get_raw_size(drive), d86f[drive].f);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 75002, SEEK_SET);
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fread(d86f[drive].track_data[1], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fread(d86f[drive].track_data[1], 1, d86f_get_raw_size(drive), d86f[drive].f);
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}
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}
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@@ -422,23 +403,21 @@ void d86f_writeback(int drive, int track)
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fwrite(&(d86f[drive].track_flags), 1, 1, d86f[drive].f);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 2, SEEK_SET);
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fwrite(d86f[drive].track_layout[0], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fwrite(d86f[drive].track_layout[0], 1, d86f_get_raw_size(drive), d86f[drive].f);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 25002, SEEK_SET);
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fwrite(d86f[drive].track_data[0], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fwrite(d86f[drive].track_data[0], 1, d86f_get_raw_size(drive), d86f[drive].f);
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if (d86f_get_sides(drive) == 2)
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{
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 50002, SEEK_SET);
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fwrite(d86f[drive].track_layout[1], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fwrite(d86f[drive].track_layout[1], 1, d86f_get_raw_size(drive), d86f[drive].f);
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fseek(d86f[drive].f, d86f[drive].track_pos[track] + 75002, SEEK_SET);
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fwrite(d86f[drive].track_data[1], 1, d86f[drive].raw_track_size, d86f[drive].f);
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fwrite(d86f[drive].track_data[1], 1, d86f_get_raw_size(drive), d86f[drive].f);
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}
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}
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void d86f_reset(int drive, int side)
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{
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d86f_count[drive][side] = 0;
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if (side == 0)
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{
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index_count[drive] = 0;
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@@ -794,7 +773,6 @@ static uint32_t datac[2] = {0, 0};
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void d86f_poll()
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{
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sector_t *s;
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int data;
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int drive = d86f_drive;
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int side = d86f_side[drive];
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@@ -1223,9 +1201,6 @@ void d86f_poll()
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// pclog("Write start: %i %i %i %i, data size: %i (%i)\n", last_sector[drive].c, last_sector[drive].h, last_sector[drive].r, last_sector[drive].n, d86f_data_size(drive), d86f_n[drive]);
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}
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break;
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/* case STATE_FORMAT:
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// pclog("Format: Starting sector fill...\n");
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break; */
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}
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break;
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}
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