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fix: implement proper SRAM mirroring and stub Flash

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-03-15 21:54:55 -03:00
parent 04d54ec97a
commit 40968f0990
4 changed files with 106 additions and 37 deletions
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4
src/Bus.zig
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@@ -147,7 +147,7 @@ pub fn read8(self: *const Self, addr: u32) u8 {
0x0800_0000...0x09FF_FFFF => self.pak.get8(addr - 0x0800_0000),
0x0A00_0000...0x0BFF_FFFF => self.pak.get8(addr - 0x0A00_0000),
0x0C00_0000...0x0DFF_FFFF => self.pak.get8(addr - 0x0C00_0000),
0x0E00_0000...0x0EFF_FFFF => self.pak.sram.get8(addr & 0xFFFF),
0x0E00_0000...0x0E00_FFFF => self.pak.backup.get8(addr & 0xFFFF),
else => undRead("Tried to read from 0x{X:0>2}", .{addr}),
};
@@ -162,7 +162,7 @@ pub fn write8(self: *Self, addr: u32, byte: u8) void {
0x0400_0410 => log.info("Ignored write of 0x{X:0>2} to 0x{X:0>8}", .{ byte, addr }),
// External Memory (Game Pak)
0x0E00_0000...0x0E00_FFFF => self.pak.sram.set8(addr & 0xFFFF, byte),
0x0E00_0000...0x0E00_FFFF => self.pak.backup.set8(addr & 0xFFFF, byte),
else => undWrite("Tried to write 0x{X:0>2} to 0x{X:0>8}", .{ byte, addr }),
}
}