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Made an initial, very naive attempt to recognise two types of expanded cartridge: those with a superchip and those with a CBS RAM+, in both cases by looking for instructions that appear to write into cartridge space.

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This commit is contained in:
Thomas Harte 2017-02-26 17:11:57 -05:00
parent 153525f23d
commit 8b1ec827e0
2 changed files with 21 additions and 4 deletions
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21
StaticAnalyser/Atari/StaticAnalyser.cpp
View File

@ -27,9 +27,10 @@ void StaticAnalyser::Atari::AddTargets(
target.tapes = tapes;
target.cartridges = cartridges;
target.atari.paging_model = Atari2600PagingModel::None;
target.atari.uses_superchip = false;
// try to figure out the paging scheme
/* if(!cartridges.empty())
if(!cartridges.empty())
{
const std::list<Storage::Cartridge::Cartridge::Segment> &segments = cartridges.front()->get_segments();
if(segments.size() == 1)
@ -48,9 +49,23 @@ void StaticAnalyser::Atari::AddTargets(
}
StaticAnalyser::MOS6502::Disassembly disassembly =
StaticAnalyser::MOS6502::Disassemble(segment.data, 0x1000, {entry_address, break_address}, 0x1fff);
printf("%p", &disassembly);
// 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
if(!disassembly.internal_stores.empty())
{
bool writes_above_128 = false;
for(uint16_t address : disassembly.internal_stores)
{
writes_above_128 |= ((address & 0x1fff) > 0x10ff) && ((address & 0x1fff) < 0x1200);
}
if(writes_above_128)
target.atari.paging_model = Atari2600PagingModel::CBSRamPlus;
else
target.atari.uses_superchip = true;
}
}
}*/
}
destination.push_back(target);
}

4
StaticAnalyser/StaticAnalyser.hpp
View File

@ -32,7 +32,8 @@ enum class Atari2600PagingModel {
Atari32k,
ActivisionStack,
ParkerBros,
Tigervision
Tigervision,
CBSRamPlus
};
/*!
@ -57,6 +58,7 @@ struct Target {
struct {
Atari2600PagingModel paging_model;
bool uses_superchip;
} atari;
struct {