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#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>;
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