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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/*********************************************************************
formats/d80_dsk.c
Commodore 8050 sector disk image format
*********************************************************************/
#include "emu.h"
#include "formats/d80_dsk.h"
d80_format::d80_format() : d64_format(file_formats)
{
}
d80_format::d80_format(const format *_formats) : d64_format(_formats)
{
}
const char *d80_format::name() const
{
return "d80";
}
const char *d80_format::description() const
{
return "Commodore 8050 disk image";
}
const char *d80_format::extensions() const
{
return "d80";
}
const d80_format::format d80_format::file_formats[] = {
{ // d80, dos 2.5, 77 tracks, head/stepper 100 tpi
floppy_image::FF_525, floppy_image::SSQD, 2083, 77, 1, 256, 9, 8
},
{}
};
const UINT32 d80_format::d80_cell_size[] =
{
2667, // 12MHz/2/16
2500, // 12MHz/2/15
2333, // 12MHz/2/14
2167 // 12MHz/2/13
};
const int d80_format::d80_sectors_per_track[] =
{
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, // 1-39
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, // 40-53
25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, // 54-64
23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, // 65-77
23, 23, 23, 23, 23, 23, 23 // 78-84
};
const int d80_format::d80_speed_zone[] =
{
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // 1-39
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 40-53
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 54-64
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 65-77
0, 0, 0, 0, 0, 0, 0 // 78-84
};
int d80_format::get_physical_track(const format &f, int head, int track)
{
return track;
}
UINT32 d80_format::get_cell_size(const format &f, int track)
{
return d80_cell_size[d80_speed_zone[track]];
}
int d80_format::get_sectors_per_track(const format &f, int track)
{
return d80_sectors_per_track[track];
}
int d80_format::get_disk_id_offset(const format &f)
{
// t39s0 +0x18
return 0x44e18;
}
floppy_image_format_t::desc_e* d80_format::get_sector_desc(const format &f, int ¤t_size, int sector_count, UINT8 id1, UINT8 id2, int gap_2)
{
static floppy_image_format_t::desc_e desc[] = {
/* 00 */ { SECTOR_LOOP_START, 0, -1 },
/* 01 */ { RAWBYTE, 0xff, 5 },
/* 02 */ { GCR5, 0x08, 1 },
/* 03 */ { CRC, 1 },
/* 04 */ { CRC_CBM_START, 1 },
/* 05 */ { SECTOR_ID_GCR5 },
/* 06 */ { TRACK_ID_DOS25_GCR5 },
/* 07 */ { GCR5, id2, 1 },
/* 08 */ { GCR5, id1, 1 },
/* 09 */ { CRC_END, 1 },
/* 10 */ { GCR5, 0x0f, 2 },
/* 11 */ { RAWBYTE, 0x55, f.gap_1 },
/* 12 */ { RAWBYTE, 0xff, 5 },
/* 13 */ { GCR5, 0x07, 1 },
/* 14 */ { CRC_CBM_START, 2 },
/* 15 */ { SECTOR_DATA_GCR5, -1 },
/* 16 */ { CRC_END, 2 },
/* 17 */ { CRC, 2 },
/* 18 */ { GCR5, 0x00, 2 },
/* 19 */ { RAWBYTE, 0x55, gap_2 },
/* 20 */ { SECTOR_LOOP_END },
/* 21 */ { RAWBYTE, 0x55, 0 },
/* 22 */ { RAWBITS, 0x5555, 0 },
/* 23 */ { END }
};
current_size = 40 + (1+1+4+2)*10 + (f.gap_1)*8 + 40 + (1+f.sector_base_size+1+2)*10 + gap_2*8;
current_size *= sector_count;
return desc;
}
const floppy_format_type FLOPPY_D80_FORMAT = &floppy_image_format_creator<d80_format>;
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