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Relaxes ColecoVision cartridge size test.

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This commit is contained in:
Thomas Harte 2018-08-04 21:40:02 -04:00
parent 11ae2c64ba
commit 33ea90678c
1 changed files with 16 additions and 16 deletions
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24
Analyser/Static/Coleco/StaticAnalyser.cpp
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@ -17,13 +17,8 @@ static std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>>
// only one mapped item is allowed
if(segments.size() != 1) continue;
// which must be 8, 12, 16, 24 or 32 kb in size
const Storage::Cartridge::Cartridge::Segment &segment = segments.front();
const std::size_t data_size = segment.data.size();
const std::size_t overflow = data_size&8191;
if(overflow > 8 && overflow != 512 && (data_size != 12*1024)) continue;
if(data_size < 8192) continue;
// the two bytes that will be first must be 0xaa and 0x55, either way around
auto *start = &segment.data[0];
@ -34,20 +29,25 @@ static std::vector<std::shared_ptr<Storage::Cartridge::Cartridge>>
if(start[0] == start[1]) continue;
// probability of a random binary blob that isn't a Coleco ROM proceeding to here is 1 - 1/32768.
if(!overflow) {
coleco_cartridges.push_back(cartridge);
} else {
// Size down to a multiple of 8kb and apply the start address.
// Round up to the next multiple of 8kb if this image is less than 32kb. Otherwise round down if
// this image is within a short distance of 32kb.
std::vector<Storage::Cartridge::Cartridge::Segment> output_segments;
size_t target_size;
if(data_size >= 32*1024 && data_size < 32*1024 + 512) {
target_size = 32 * 1024;
} else {
target_size = data_size + ((8192 - (data_size & 8191)) & 8191);
}
std::vector<uint8_t> truncated_data;
std::vector<uint8_t>::difference_type truncated_size = static_cast<std::vector<uint8_t>::difference_type>(segment.data.size()) & ~8191;
truncated_data.insert(truncated_data.begin(), segment.data.begin(), segment.data.begin() + truncated_size);
truncated_data = segment.data;
truncated_data.resize(target_size);
output_segments.emplace_back(0x8000, truncated_data);
coleco_cartridges.emplace_back(new Storage::Cartridge::Cartridge(output_segments));
}
}
return coleco_cartridges;
}