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Diffstat (limited to 'trunk/src/lib/formats/hxcmfm_dsk.c')
-rw-r--r--trunk/src/lib/formats/hxcmfm_dsk.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/trunk/src/lib/formats/hxcmfm_dsk.c b/trunk/src/lib/formats/hxcmfm_dsk.c
new file mode 100644
index 00000000000..9e6e18c5a50
--- /dev/null
+++ b/trunk/src/lib/formats/hxcmfm_dsk.c
@@ -0,0 +1,70 @@
+#include "hxcmfm_dsk.h"
+
+#define MFM_FORMAT_HEADER "HXCMFM"
+
+#pragma pack(1)
+
+struct MFMIMG
+{
+ UINT8 headername[7];
+
+ UINT16 number_of_track;
+ UINT8 number_of_side;
+
+ UINT16 floppyRPM;
+ UINT16 floppyBitRate;
+ UINT8 floppyiftype;
+
+ UINT32 mfmtracklistoffset;
+};
+
+struct MFMTRACKIMG
+{
+ UINT16 track_number;
+ UINT8 side_number;
+ UINT32 mfmtracksize;
+ UINT32 mfmtrackoffset;
+};
+
+#pragma pack()
+
+mfm_format::mfm_format(const char *name,const char *extensions,const char *description,const char *param_guidelines) :
+ floppy_image_format_t(name,extensions,description,param_guidelines)
+{
+}
+
+int mfm_format::identify(floppy_image *image)
+{
+ UINT8 header[7];
+
+ image->image_read(&header, 0, sizeof(header));
+ if ( memcmp( header, MFM_FORMAT_HEADER, 6 ) ==0) {
+ return 100;
+ }
+ return 0;
+}
+
+bool mfm_format::load(floppy_image *image)
+{
+ MFMIMG header;
+ MFMTRACKIMG trackdesc;
+
+ // read header
+ image->image_read(&header,0, sizeof(header));
+
+ image->set_meta_data(header.number_of_track,header.number_of_side,header.floppyRPM,header.floppyBitRate);
+
+ for(int track=0; track < header.number_of_track; track++) {
+ for(int side=0; side < header.number_of_side; side++) {
+ // read location of
+ image->image_read(&trackdesc,(header.mfmtracklistoffset)+((( track << 1 ) + side)*sizeof(trackdesc)),sizeof(trackdesc));
+
+ image->set_track_size(track, side, trackdesc.mfmtracksize);
+ // actual data read
+ image->image_read(image->get_buffer(track,side), trackdesc.mfmtrackoffset, trackdesc.mfmtracksize);
+ }
+ }
+ return FALSE;
+}
+
+const floppy_format_type FLOPPY_MFM_FORMAT = &floppy_image_format_creator<mfm_format>;