[NES] one last cpu bug

BizHawk.Emulation/CPUs/MOS 6502/Execute.cs

@@ -664,8 +664,8 @@ FlagT = true;// this seems wrong
                         PendingCycles -= 2; TotalExecutedCycles += 2;
                         break;
                     case 0x81: // STA (addr,X)
-                        temp16 = ReadWordPageWrap(ReadMemory(PC++));
-                        value16 = (ushort)(temp16+X);
+                        temp8 = (byte)(ReadMemory(PC++) + X);
+                        value16 = ReadWordPageWrap(temp8);
                         WriteMemory(value16, A);
                         PendingCycles -= 6; TotalExecutedCycles += 6;
                         break;

BizHawk.Emulation/Consoles/Nintendo/Docs/test_status.txt

@@ -1,32 +1,42 @@
 look for tests here: http://wiki.nesdev.com/w/index.php/Emulator_tests
 
-blargg's MMC3: 
+==blargg's tests==
+
+MMC3: 
 	FAIL for 4 and 6. i think 4 might not fail until some invisible PPU operations are correct. neither nintendulator or fceux pass these.
 
-blargg's ppu tests: 
+ppu tests: 
 	PASS for all but power_up_palette.nes which is lame
 
-blargg's ppu_vbl_nmi:
+ppu_vbl_nmi:
 	FAIL for 9. But hardly anyone passes this.....
 	
-blargg's sprite hit tests:
+sprite hit tests:
 	FAIL for 9 and 10. fceux passes 10 (oldppu) and nintendulator passes both. 
-	boath are not going to work any time soon due to sprite pattern decoding being separate from BG pattern fetching instead of interleaved.
+	both are not going to work any time soon due to sprite pattern decoding being separate from BG pattern fetching instead of interleaved.
+
+cpu_timing_test.nes
+	PASS
+	
+official_only.nes
+	PASS
 	
 all_instrs.nes
 	FAIL (freezes emu??). I think this requires undocumented instructions.
 	
+instr_timing.nes
+	PASS	
+	
 cpu_interrupts.nes
 	PASS
 	
 instr_misc.nes
 	PASS
 	
-instr_timing.nes
-	PASS
+=============
 	
 nestest.nes
 	PASS
-	
-official_only.nes
-	PASS
+
+NEStress.nes
+	FAIL in several cases, but this test is not highly regarded and may be inaccurate.

CpuCoreGenerator/MOS 6502/CoreGenerator.cs

@@ -575,8 +575,8 @@ namespace M6502
                     w.WriteLine(Spaces + "PC += 2;");
                     break;
                 case AddrMode.IndirectX:
-                    w.WriteLine(Spaces + "temp16 = ReadWordPageWrap(ReadMemory(PC++));");
-                    w.WriteLine(Spaces + dest + " = (ushort)(temp16+X);");
+                    w.WriteLine(Spaces + "temp8 = (byte)(ReadMemory(PC++) + X);");
+                    w.WriteLine(Spaces + dest + " = ReadWordPageWrap(temp8);");
                     break;
                 case AddrMode.IndirectY:
                     w.WriteLine(Spaces + "temp16 = ReadWordPageWrap(ReadMemory(PC++));");