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102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
// license:BSD-3-Clause
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// copyright-holders:Curt Coder
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/*********************************************************************
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formats/c3040_dsk.c
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Commodore 3040 sector disk image format
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*********************************************************************/
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#include <assert.h>
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#include "formats/c3040_dsk.h"
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c3040_format::c3040_format() : d64_format(file_formats)
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{
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}
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const char *c3040_format::name() const
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{
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return "c3040";
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}
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const char *c3040_format::description() const
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{
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return "Commodore 3040 disk image";
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}
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const char *c3040_format::extensions() const
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{
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return "d67";
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}
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const c3040_format::format c3040_format::file_formats[] = {
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{ // d67, dos 1, 35 tracks, head 48 tpi, stepper 96 tpi
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floppy_image::FF_525, floppy_image::SSSD, 690, 35, 1, 256, 9, 8
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},
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{}
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};
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const int c3040_format::c3040_sectors_per_track[] =
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{
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21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, // 1-17
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20, 20, 20, 20, 20, 20, 20, // 18-24
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18, 18, 18, 18, 18, 18, // 25-30
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17, 17, 17, 17, 17, // 31-35
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17, 17, 17, 17, 17, // 36-40
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17, 17 // 41-42
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};
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const int c3040_format::c3040_gap2[] =
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{
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11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, // 1-17
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8, 8, 8, 8, 8, 8, 8, // 18-24
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15, 15, 15, 15, 15, 15, // 25-30
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12, 12, 12, 12, 12 // 31-35
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};
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floppy_image_format_t::desc_e* c3040_format::get_sector_desc(const format &f, int ¤t_size, int sector_count, UINT8 id1, UINT8 id2, int gap_2)
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{
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static floppy_image_format_t::desc_e desc[] = {
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/* 00 */ { SECTOR_LOOP_START, 0, -1 },
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/* 01 */ { SYNC_GCR5, 2 },
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/* 02 */ { GCR5, 0x08, 1 },
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/* 03 */ { CRC, 1 },
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/* 04 */ { CRC_CBM_START, 1 },
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/* 05 */ { SECTOR_ID_GCR5 },
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/* 06 */ { TRACK_ID_DOS2_GCR5 },
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/* 07 */ { GCR5, id2, 1 },
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/* 08 */ { GCR5, id1, 1 },
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/* 09 */ { CRC_END, 1 },
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/* 10 */ { GCR5, 0x00, f.gap_1 },
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/* 11 */ { SYNC_GCR5, 2 },
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/* 12 */ { GCR5, 0x07, 1 },
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/* 13 */ { CRC_CBM_START, 2 },
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/* 14 */ { SECTOR_DATA_GCR5, -1 },
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/* 15 */ { CRC_END, 2 },
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/* 16 */ { CRC, 2 },
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/* 17 */ { GCR5, 0x00, gap_2 },
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/* 18 */ { SECTOR_LOOP_END },
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/* 19 */ { GCR5, 0x00, 0 },
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/* 20 */ { RAWBITS, 0x14a, 0 },
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/* 21 */ { END }
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};
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desc[17].p2 = gap_2; // TODO why?!?
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current_size = 20 + (1+1+4)*10 + f.gap_1*10 + 20 + (1+f.sector_base_size+1)*10 + gap_2*10;
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current_size *= sector_count;
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return desc;
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}
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void c3040_format::fix_end_gap(floppy_image_format_t::desc_e* desc, int remaining_size)
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{
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desc[19].p2 = remaining_size / 10;
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desc[20].p2 = remaining_size % 10;
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desc[20].p1 >>= remaining_size & 0x01;
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}
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const floppy_format_type FLOPPY_C3040_FORMAT = &floppy_image_format_creator<c3040_format>;
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