diff options
Diffstat (limited to 'src/lib/formats/d80_dsk.cpp')
-rw-r--r-- | src/lib/formats/d80_dsk.cpp | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/lib/formats/d80_dsk.cpp b/src/lib/formats/d80_dsk.cpp new file mode 100644 index 00000000000..222ef488544 --- /dev/null +++ b/src/lib/formats/d80_dsk.cpp @@ -0,0 +1,134 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************* + + formats/d80_dsk.c + + Commodore 8050 sector disk image format + +*********************************************************************/ + +#include <assert.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, 21, 19 // TODO verify gaps + }, + {} +}; + +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, f.gap_1 }, + /* 11 */ { RAWBYTE, 0xff, 5 }, + /* 12 */ { GCR5, 0x07, 1 }, + /* 13 */ { CRC_CBM_START, 2 }, + /* 14 */ { SECTOR_DATA_GCR5, -1 }, + /* 15 */ { CRC_END, 2 }, + /* 16 */ { CRC, 2 }, + /* 17 */ { GCR5, 0x0f, gap_2 }, + /* 18 */ { SECTOR_LOOP_END }, + /* 19 */ { RAWBYTE, 0x55, 0 }, + /* 20 */ { RAWBITS, 0x5555, 0 }, + /* 21 */ { END } + }; + + current_size = 40 + (1+1+4)*10 + (f.gap_1)*10 + 40 + (1+f.sector_base_size+1)*10 + gap_2*10; + + current_size *= sector_count; + return desc; +} + +void d80_format::fix_end_gap(floppy_image_format_t::desc_e* desc, int remaining_size) +{ + desc[19].p2 = remaining_size / 8; + desc[20].p2 = remaining_size & 7; + desc[20].p1 >>= remaining_size & 0x01; +} + +const floppy_format_type FLOPPY_D80_FORMAT = &floppy_image_format_creator<d80_format>; |