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Switched to image inspection for RAM guesses rather than disassembly. Which fixes the other Parker Bros titles.
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@ -93,8 +93,8 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
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}
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}
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break;
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break;
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case StaticAnalyser::Atari2600PagingModel::ParkerBros:
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case StaticAnalyser::Atari2600PagingModel::ParkerBros:
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if(masked_address >= 0x1fe0 && masked_address <= 0x1ff8) {
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if(masked_address >= 0x1fe0 && masked_address < 0x1ff8) {
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int slot = (masked_address - 0x1fe0) >> 3;
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int slot = (masked_address >> 3) & 3;
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int target = masked_address & 7;
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int target = masked_address & 7;
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rom_pages_[slot] = &rom_[target * 1024];
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rom_pages_[slot] = &rom_[target * 1024];
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}
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}
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@ -290,13 +290,13 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target)
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// On a real paged cartridge, any page may initially be visible. Various homebrew authors appear to have
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// On a real paged cartridge, any page may initially be visible. Various homebrew authors appear to have
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// decided the last page will always be initially visible. So do that.
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// decided the last page will always be initially visible. So do that.
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size_t romMask = rom_size_ - 1;
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size_t rom_mask = rom_size_ - 1;
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uint8_t *rom_base = rom_;
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uint8_t *rom_base = rom_;
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if(rom_size_ > 4096) rom_base = &rom_[rom_size_ - 4096];
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if(rom_size_ > 4096) rom_base = &rom_[rom_size_ - 4096];
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rom_pages_[0] = rom_base;
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rom_pages_[0] = rom_base;
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rom_pages_[1] = &rom_base[1024 & romMask];
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rom_pages_[1] = &rom_base[1024 & rom_mask];
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rom_pages_[2] = &rom_base[2048 & romMask];
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rom_pages_[2] = &rom_base[2048 & rom_mask];
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rom_pages_[3] = &rom_base[3072 & romMask];
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rom_pages_[3] = &rom_base[3072 & rom_mask];
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switch(target.atari.paging_model)
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switch(target.atari.paging_model)
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{
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{
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@ -145,19 +145,32 @@ static void DeterminePagingForCartridge(StaticAnalyser::Target &target, const St
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}
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}
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// check for any sort of on-cartridge RAM; that might imply a Super Chip or else immediately tip the
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// check for any sort of on-cartridge RAM; that might imply a Super Chip or else immediately tip the
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// hat that this is a CBS RAM+ cartridge
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// hat that this is a CBS RAM+ cartridge. Atari ROM images always have the same value stored over RAM
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if(internal_stores.size() > 4)
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// regions.
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bool has_superchip = true;
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bool is_ram_plus = true;
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for(size_t address = 0; address < 256; address++)
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{
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{
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bool writes_above_128 = false;
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if(segment.data[address] != segment.data[0])
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for(uint16_t address : internal_stores)
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{
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{
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writes_above_128 |= ((address & 0x1fff) > 0x10ff) && ((address & 0x1fff) < 0x1200);
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if(address < 128) has_superchip = false;
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is_ram_plus = false;
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}
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}
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if(writes_above_128)
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target.atari.paging_model = StaticAnalyser::Atari2600PagingModel::CBSRamPlus;
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else
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target.atari.uses_superchip = true;
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}
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}
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target.atari.uses_superchip = has_superchip;
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if(is_ram_plus) target.atari.paging_model = StaticAnalyser::Atari2600PagingModel::CBSRamPlus;
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// if(internal_stores.size() > 4)
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// {
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// bool writes_above_128 = false;
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// for(uint16_t address : internal_stores)
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// {
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// writes_above_128 |= ((address & 0x1fff) > 0x10ff) && ((address & 0x1fff) < 0x1200);
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// }
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// if(writes_above_128)
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// target.atari.paging_model = StaticAnalyser::Atari2600PagingModel::CBSRamPlus;
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// else
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// target.atari.uses_superchip = true;
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// }
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}
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}
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void StaticAnalyser::Atari::AddTargets(
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void StaticAnalyser::Atari::AddTargets(
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