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Started adding an attempt to distinguish between Atari and Parker Bros paging schemes.

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This commit is contained in:
Thomas Harte 2017-03-11 11:41:18 -05:00
parent 9c72ce5bd2
commit 8dbf9fd302
1 changed files with 29 additions and 3 deletions
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32
StaticAnalyser/Atari/StaticAnalyser.cpp
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@ -90,6 +90,27 @@ static void DeterminePagingFor2kCartridge(StaticAnalyser::Target &target, const
target.atari.paging_model = StaticAnalyser::Atari2600PagingModel::CommaVid; target.atari.paging_model = StaticAnalyser::Atari2600PagingModel::CommaVid;
} }
static void DeterminePagingFor8kCartridge(StaticAnalyser::Target &target, const Storage::Cartridge::Cartridge::Segment &segment, const std::vector<StaticAnalyser::MOS6502::Disassembly> &disassemblies)
{
std::set<uint16_t> internal_accesses;
for(const StaticAnalyser::MOS6502::Disassembly &disassembly : disassemblies)
{
internal_accesses.insert(disassembly.internal_stores.begin(), disassembly.internal_stores.end());
internal_accesses.insert(disassembly.internal_modifies.begin(), disassembly.internal_modifies.end());
internal_accesses.insert(disassembly.internal_loads.begin(), disassembly.internal_loads.end());
}
bool looks_like_atari = false;
bool looks_like_parker_bros = false;
for(uint16_t address : internal_accesses)
{
looks_like_atari |= ((address & 0x1fff) >= 0x1ff8) && ((address & 0x1fff) < 0x1ffa);
looks_like_parker_bros |= ((address & 0x1fff) >= 0x1fe0) && ((address & 0x1fff) < 0x1fe8);
}
printf("%s %s\n", looks_like_atari ? "a" : "-", looks_like_parker_bros ? "p" : "-");
}
static void DeterminePagingForCartridge(StaticAnalyser::Target &target, const Storage::Cartridge::Cartridge::Segment &segment) static void DeterminePagingForCartridge(StaticAnalyser::Target &target, const Storage::Cartridge::Cartridge::Segment &segment)
{ {
if(segment.data.size() == 2048) if(segment.data.size() == 2048)
@ -100,8 +121,8 @@ static void DeterminePagingForCartridge(StaticAnalyser::Target &target, const St
uint16_t entry_address, break_address; uint16_t entry_address, break_address;
entry_address = (uint16_t)(segment.data[0xffc] | (segment.data[0xffd] << 8)); entry_address = (uint16_t)(segment.data[segment.data.size() - 4] | (segment.data[segment.data.size() - 3] << 8));
break_address = (uint16_t)(segment.data[0xffe] | (segment.data[0xfff] << 8)); break_address = (uint16_t)(segment.data[segment.data.size() - 2] | (segment.data[segment.data.size() - 1] << 8));
std::function<size_t(uint16_t address)> address_mapper = [](uint16_t address) { std::function<size_t(uint16_t address)> address_mapper = [](uint16_t address) {
if(!(address & 0x1000)) return (size_t)-1; if(!(address & 0x1000)) return (size_t)-1;
@ -112,11 +133,16 @@ static void DeterminePagingForCartridge(StaticAnalyser::Target &target, const St
std::set<uint16_t> internal_stores; std::set<uint16_t> internal_stores;
for(std::vector<uint8_t>::difference_type base = 0; base < segment.data.size(); base += 4096) for(std::vector<uint8_t>::difference_type base = 0; base < segment.data.size(); base += 4096)
{ {
std::vector<uint8_t> sub_data(segment.data.begin() + base, segment.data.begin() + base + 2048); std::vector<uint8_t> sub_data(segment.data.begin() + base, segment.data.begin() + base + 4096);
disassemblies.push_back(StaticAnalyser::MOS6502::Disassemble(sub_data, address_mapper, {entry_address, break_address})); disassemblies.push_back(StaticAnalyser::MOS6502::Disassemble(sub_data, address_mapper, {entry_address, break_address}));
internal_stores.insert(disassemblies.back().internal_stores.begin(), disassemblies.back().internal_stores.end()); internal_stores.insert(disassemblies.back().internal_stores.begin(), disassemblies.back().internal_stores.end());
} }
if(segment.data.size() == 8192)
{
DeterminePagingFor8kCartridge(target, segment, disassemblies);
}
// check for any sort of on-cartridge RAM; that might imply a Super Chip or else immediately tip the // check for any sort of on-cartridge RAM; that might imply a Super Chip or else immediately tip the
// hat that this is a CBS RAM+ cartridge // hat that this is a CBS RAM+ cartridge
if(internal_stores.size() > 4) if(internal_stores.size() > 4)