1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
#include <sfc/sfc.hpp>
#define MEMORY_CPP
namespace SuperFamicom {
Bus bus;
void Bus::map(
const function<uint8 (unsigned)>& reader,
const function<void (unsigned, uint8)>& writer,
unsigned banklo, unsigned bankhi,
unsigned addrlo, unsigned addrhi,
unsigned size, unsigned base, unsigned mask
) {
assert(banklo <= bankhi && banklo <= 0xff);
assert(addrlo <= addrhi && addrlo <= 0xffff);
assert(idcount < 255);
unsigned id = idcount++;
this->reader[id] = reader;
this->writer[id] = writer;
for(unsigned bank = banklo; bank <= bankhi; bank++) {
for(unsigned addr = addrlo; addr <= addrhi; addr++) {
unsigned offset = reduce(bank << 16 | addr, mask);
if(size) offset = base + mirror(offset, size - base);
lookup[bank << 16 | addr] = id;
target[bank << 16 | addr] = offset;
}
}
}
void Bus::map_reset() {
function<uint8 (unsigned)> reader = [](unsigned) { return cpu.regs.mdr; };
function<void (unsigned, uint8)> writer = [](unsigned, uint8) {};
idcount = 0;
map(reader, writer, 0x00, 0xff, 0x0000, 0xffff);
}
void Bus::map_xml() {
for(auto& m : cartridge.mapping) {
lstring part = m.addr.split<1>(":");
lstring banks = part(0).split(",");
lstring addrs = part(1).split(",");
for(auto& bank : banks) {
for(auto& addr : addrs) {
lstring bankpart = bank.split<1>("-");
lstring addrpart = addr.split<1>("-");
unsigned banklo = hex(bankpart(0));
unsigned bankhi = hex(bankpart(1, bankpart(0)));
unsigned addrlo = hex(addrpart(0));
unsigned addrhi = hex(addrpart(1, addrpart(0)));
map(m.reader, m.writer, banklo, bankhi, addrlo, addrhi, m.size, m.base, m.mask);
}
}
}
}
Bus::Bus() {
lookup = new uint8 [16 * 1024 * 1024];
target = new uint32[16 * 1024 * 1024];
}
Bus::~Bus() {
delete[] lookup;
delete[] target;
}
}
|
