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Expand range of recognised formats.

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This commit is contained in:
Thomas Harte 2023-12-01 22:44:13 -05:00
parent bc89cb7d06
commit ebe1d53220
2 changed files with 18 additions and 4 deletions
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21
Storage/Disk/DiskImage/Formats/PCBooter.cpp
View File

@ -22,15 +22,28 @@ PCBooter::PCBooter(const std::string &file_name) :
switch(file_size) {
default: throw Error::InvalidFormat;
// Check for a single-sided, single-density 40-track image.
case 512 * 8 * 40:
head_count_ = 1;
track_count_ = 40;
sector_count_ = 8;
break;
case 512 * 9 * 40:
head_count_ = 1;
track_count_ = 40;
set_geometry(9, 2, 1, true);
sector_count_ = 9;
break;
case 512 * 9 * 40 * 2:
head_count_ = 2;
track_count_ = 40;
sector_count_ = 9;
break;
}
// TODO: check that an appropriate INT or similar is here?
set_geometry(sector_count_, 2, 1, true);
// TODO: check that an appropriate INT or similar is in the boot sector?
// Should probably factor out the "does this look like a PC boot sector?" test,
// as it can also be used to disambiguate FAT12 disks.
}
@ -44,5 +57,5 @@ int PCBooter::get_head_count() {
}
long PCBooter::get_file_offset_for_position(Track::Address address) {
return (address.position.as_int() * head_count_ + address.head) * 512 * 9;
return (address.position.as_int() * head_count_ + address.head) * 512 * sector_count_;
}

1
Storage/Disk/DiskImage/Formats/PCBooter.hpp
View File

@ -30,6 +30,7 @@ class PCBooter: public MFMSectorDump {
int head_count_;
int track_count_;
int sector_count_;
};
}