diff options
Diffstat (limited to 'src/lib/formats/c4040_dsk.c')
-rw-r--r-- | src/lib/formats/c4040_dsk.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/lib/formats/c4040_dsk.c b/src/lib/formats/c4040_dsk.c new file mode 100644 index 00000000000..9e6dff7f627 --- /dev/null +++ b/src/lib/formats/c4040_dsk.c @@ -0,0 +1,91 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************* + + formats/c4040_dsk.c + + Commodore 4040 sector disk image format + +*********************************************************************/ + +#include <assert.h> + +#include "formats/c4040_dsk.h" + +c4040_format::c4040_format() : d64_format(file_formats) +{ +} + +const char *c4040_format::name() const +{ + return "c4040"; +} + +const char *c4040_format::description() const +{ + return "Commodore 4040 disk image"; +} + +const char *c4040_format::extensions() const +{ + return "d64"; +} + +const c4040_format::format c4040_format::file_formats[] = { + { // c4040, dos 2, 35 tracks, head 48 tpi, stepper 96 tpi + floppy_image::FF_525, floppy_image::SSSD, 683, 35, 1, 256, 9, 8 + }, + {} +}; + +const int c4040_format::c4040_gap2[] = +{ + 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, // 1-17 + 19, 19, 19, 19, 19, 19, 19, // 18-24 + 15, 15, 15, 15, 15, 15, // 25-30 + 12, 12, 12, 12, 12 // 31-35 +}; + +floppy_image_format_t::desc_e* c4040_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 */ { SYNC_GCR5, 4 }, + /* 02 */ { GCR5, 0x08, 1 }, + /* 03 */ { CRC, 1 }, + /* 04 */ { CRC_CBM_START, 1 }, + /* 05 */ { SECTOR_ID_GCR5 }, + /* 06 */ { TRACK_ID_DOS2_GCR5 }, + /* 07 */ { GCR5, id2, 1 }, + /* 08 */ { GCR5, id1, 1 }, + /* 09 */ { CRC_END, 1 }, + /* 10 */ { GCR5, 0x00, f.gap_1 }, + /* 11 */ { SYNC_GCR5, 4 }, + /* 12 */ { GCR5, 0x07, 1 }, + /* 13 */ { CRC_CBM_START, 2 }, + /* 14 */ { SECTOR_DATA_GCR5, -1 }, + /* 15 */ { CRC_END, 2 }, + /* 16 */ { CRC, 2 }, + /* 17 */ { GCR5, 0x00, gap_2 }, + /* 18 */ { SECTOR_LOOP_END }, + /* 19 */ { GCR5, 0x00, 0 }, + /* 20 */ { RAWBITS, 0x14a, 0 }, + /* 21 */ { END } + }; + + desc[17].p2 = gap_2; // TODO why?!? + + 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 c4040_format::fix_end_gap(floppy_image_format_t::desc_e* desc, int remaining_size) +{ + desc[19].p2 = remaining_size / 10; + desc[20].p2 = remaining_size % 10; + desc[20].p1 >>= remaining_size & 0x01; +} + +const floppy_format_type FLOPPY_C4040_FORMAT = &floppy_image_format_creator<c4040_format>; |