mirror of https://github.com/bsnes-emu/bsnes.git
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
#include <sfc/sfc.hpp>
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#define MEMORY_CPP
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namespace SuperFamicom {
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Bus bus;
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void Bus::map(
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const function<uint8 (unsigned)>& reader,
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const function<void (unsigned, uint8)>& writer,
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unsigned banklo, unsigned bankhi,
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unsigned addrlo, unsigned addrhi,
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unsigned size, unsigned base, unsigned mask
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) {
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assert(banklo <= bankhi && banklo <= 0xff);
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assert(addrlo <= addrhi && addrlo <= 0xffff);
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assert(idcount < 255);
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unsigned id = idcount++;
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this->reader[id] = reader;
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this->writer[id] = writer;
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for(unsigned bank = banklo; bank <= bankhi; bank++) {
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for(unsigned addr = addrlo; addr <= addrhi; addr++) {
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unsigned offset = reduce(bank << 16 | addr, mask);
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if(size) offset = base + mirror(offset, size - base);
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lookup[bank << 16 | addr] = id;
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target[bank << 16 | addr] = offset;
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}
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}
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}
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void Bus::map_reset() {
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function<uint8 (unsigned)> reader = [](unsigned) { return cpu.regs.mdr; };
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function<void (unsigned, uint8)> writer = [](unsigned, uint8) {};
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idcount = 0;
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map(reader, writer, 0x00, 0xff, 0x0000, 0xffff);
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}
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void Bus::map_xml() {
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for(auto& m : cartridge.mapping) {
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lstring part = m.addr.split<1>(":");
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lstring banks = part(0).split(",");
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lstring addrs = part(1).split(",");
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for(auto& bank : banks) {
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for(auto& addr : addrs) {
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lstring bankpart = bank.split<1>("-");
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lstring addrpart = addr.split<1>("-");
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unsigned banklo = hex(bankpart(0));
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unsigned bankhi = hex(bankpart(1, bankpart(0)));
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unsigned addrlo = hex(addrpart(0));
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unsigned addrhi = hex(addrpart(1, addrpart(0)));
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map(m.reader, m.writer, banklo, bankhi, addrlo, addrhi, m.size, m.base, m.mask);
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}
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}
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}
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}
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Bus::Bus() {
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lookup = new uint8 [16 * 1024 * 1024];
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target = new uint32[16 * 1024 * 1024];
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}
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Bus::~Bus() {
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delete[] lookup;
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delete[] target;
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}
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}
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