| e8555c89 Andy McCall |
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#include "RomPageNN.hh" |
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|
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#include "unreachable.hh" |
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#include "xrange.hh" |
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|
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namespace openmsx { |
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|
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RomPageNN::RomPageNN(const DeviceConfig& config, Rom&& rom_, RomType type) |
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: Rom8kBBlocks(config, std::move(rom_)) |
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{ |
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const auto pages = [&] { |
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switch (type) { |
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using enum RomType; |
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case PAGE0: return 0b0001; |
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case PAGE1: return 0b0010; |
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case PAGE01: return 0x0011; |
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case PAGE2: return 0b0100; |
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case PAGE12: return 0b0110; |
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case PAGE012: return 0b0111; |
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case PAGE3: return 0b1000; |
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case PAGE23: return 0b1100; |
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case PAGE123: return 0b1110; |
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case PAGE0123: return 0b1111; |
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default: UNREACHABLE; |
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} |
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}(); |
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int bank = 0; |
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for (auto page : xrange(4)) { |
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if (pages & (1 << page)) { |
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setRom(page * 2 + 0, bank++); |
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setRom(page * 2 + 1, bank++); |
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} else { |
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setUnmapped(page * 2 + 0); |
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setUnmapped(page * 2 + 1); |
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} |
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} |
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} |
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|
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REGISTER_MSXDEVICE(RomPageNN, "RomPageNN"); |
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|
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} |