summaryrefslogtreecommitdiffstatshomepage
path: root/src/lib/formats/concept_dsk.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/formats/concept_dsk.cpp')
-rw-r--r--src/lib/formats/concept_dsk.cpp156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/lib/formats/concept_dsk.cpp b/src/lib/formats/concept_dsk.cpp
new file mode 100644
index 00000000000..c23a3c35675
--- /dev/null
+++ b/src/lib/formats/concept_dsk.cpp
@@ -0,0 +1,156 @@
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert, R. Belmont
+/*********************************************************************
+
+ formats/concept_dsk.c
+
+ Formats for Corvus Concept
+
+ 5.25" DSDD is PC MFM, 77 tracks, double-sided, with 9 sectors per track
+
+*********************************************************************/
+
+#include <assert.h>
+
+#include "flopimg.h"
+#include "formats/concept_dsk.h"
+
+/* 9 sectors / track, 512 bytes per sector */
+const floppy_image_format_t::desc_e cc525dsdd_format::cc_9_desc[] = {
+ { MFM, 0x4e, 80 },
+ { MFM, 0x00, 12 },
+ { RAW, 0x5224, 3 },
+ { MFM, 0xfc, 1 },
+ { MFM, 0x4e, 50 },
+ { MFM, 0x00, 12 },
+ { SECTOR_LOOP_START, 1, 9 },
+ { CRC_CCITT_START, 1 },
+ { RAW, 0x4489, 3 },
+ { MFM, 0xfe, 1 },
+ { TRACK_ID },
+ { HEAD_ID },
+ { SECTOR_ID },
+ { SIZE_ID },
+ { CRC_END, 1 },
+ { CRC, 1 },
+ { MFM, 0x4e, 22 },
+ { MFM, 0x00, 12 },
+ { CRC_CCITT_START, 2 },
+ { RAW, 0x4489, 3 },
+ { MFM, 0xfb, 1 },
+ { SECTOR_DATA, -1 },
+ { CRC_END, 2 },
+ { CRC, 2 },
+ { MFM, 0x4e, 84 },
+ { MFM, 0x00, 12 },
+ { SECTOR_LOOP_END },
+ { MFM, 0x4e, 170 },
+ { END }
+};
+
+cc525dsdd_format::cc525dsdd_format()
+{
+}
+
+const char *cc525dsdd_format::name() const
+{
+ return "img";
+}
+
+const char *cc525dsdd_format::description() const
+{
+ return "Corvus Concept 5.25\" DSDD floppy disk image";
+}
+
+const char *cc525dsdd_format::extensions() const
+{
+ return "img";
+}
+
+bool cc525dsdd_format::supports_save() const
+{
+ return true;
+}
+
+void cc525dsdd_format::find_size(io_generic *io, UINT8 &track_count, UINT8 &head_count, UINT8 &sector_count)
+{
+ UINT64 size = io_generic_size(io);
+
+ track_count = 77;
+ head_count = 2;
+ sector_count = 9;
+
+ UINT32 expected_size = 512 * track_count*head_count*sector_count;
+ if (size == expected_size)
+ {
+ return;
+ }
+
+ track_count = head_count = sector_count = 0;
+}
+
+int cc525dsdd_format::identify(io_generic *io, UINT32 form_factor)
+{
+ UINT8 track_count, head_count, sector_count;
+ find_size(io, track_count, head_count, sector_count);
+
+ if(track_count)
+ return 50;
+ return 0;
+}
+
+bool cc525dsdd_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+ UINT8 track_count, head_count, sector_count;
+ find_size(io, track_count, head_count, sector_count);
+
+ UINT8 sectdata[10*512];
+ desc_s sectors[10];
+ for(int i=0; i<sector_count; i++) {
+ sectors[i+1].data = sectdata + 512*i;
+ sectors[i+1].size = 512;
+ sectors[i+1].sector_id = i+1;
+ }
+
+ int track_size = sector_count*512;
+ for(int track=0; track < track_count; track++) {
+ for(int head=0; head < head_count; head++) {
+ io_generic_read(io, sectdata, (track*head_count + head)*track_size, track_size);
+ generate_track(cc_9_desc, track, head, sectors, sector_count, 100000, image);
+ }
+ }
+
+ image->set_variant(floppy_image::DSDD);
+
+ return true;
+}
+
+bool cc525dsdd_format::save(io_generic *io, floppy_image *image)
+{
+ int track_count, head_count, sector_count;
+ get_geometry_mfm_pc(image, 2000, track_count, head_count, sector_count);
+
+ if(track_count != 77)
+ track_count = 77;
+
+ // Happens for a fully unformatted floppy
+ if(!head_count)
+ head_count = 2;
+
+ if(sector_count != 9)
+ sector_count = 9;
+
+ UINT8 sectdata[9*512];
+ int track_size = sector_count*512;
+
+ for(int track=0; track < track_count; track++) {
+ for(int head=0; head < head_count; head++) {
+ get_track_data_mfm_pc(track, head, image, 2000, 512, sector_count, sectdata);
+ io_generic_write(io, sectdata, (track*head_count + head)*track_size, track_size);
+ }
+ }
+
+ return true;
+}
+
+const floppy_format_type FLOPPY_CONCEPT_525DSDD_FORMAT = &floppy_image_format_creator<cc525dsdd_format>;