From 4c599c84bda48401069a6d46163c6aef972c26a2 Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Mon, 13 Nov 2017 13:10:47 -0500
Subject: ...

---
 src/mos6502.rs | 34 +++++++++++++++++-----------------
 src/ppu.rs     |  5 +++--
 2 files changed, 20 insertions(+), 19 deletions(-)

diff --git a/src/mos6502.rs b/src/mos6502.rs
index c439700..c98b7cc 100644
--- a/src/mos6502.rs
+++ b/src/mos6502.rs
@@ -24,22 +24,22 @@ macro_rules! make_optable {
 
 macro_rules! make_addrtable {
     ($x:ident, $t: ty) => (pub const $x: [$t; 0x100] = [
-       nil, xin, nil, nil, nil, zpg, zpg, nil, nil, imm, acc, nil, nil, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil,
-       abs, xin, nil, nil, zpg, zpg, zpg, nil, nil, imm, acc, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil,
-       nil, xin, nil, nil, nil, zpg, zpg, nil, nil, imm, acc, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil,
-       nil, xin, nil, nil, nil, zpg, zpg, nil, nil, imm, acc, nil, ind, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil,
-       nil, xin, nil, nil, zpg, zpg, zpg, nil, nil, nil, nil, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, zpx, zpx, zpy, nil, nil, aby, nil, nil, nil, abx, nil, nil,
-       imm, xin, imm, nil, zpg, zpg, zpg, nil, nil, imm, nil, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, zpx, zpx, zpy, nil, nil, aby, nil, nil, abx, abx, aby, nil,
-       imm, xin, nil, nil, zpg, zpg, zpg, nil, nil, imm, nil, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil,
-       imm, xin, nil, nil, zpg, zpg, zpg, nil, nil, imm, nil, nil, abs, abs, abs, nil,
-       rel, iny, nil, nil, nil, zpx, zpx, nil, nil, aby, nil, nil, nil, abx, abx, nil
+        nil, xin, nil, xin, zpg, zpg, zpg, zpg, nil, imm, acc, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
+        abs, xin, nil, xin, zpg, zpg, zpg, zpg, nil, imm, acc, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
+        nil, xin, nil, xin, zpg, zpg, zpg, zpg, nil, imm, acc, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
+        nil, xin, nil, xin, zpg, zpg, zpg, zpg, nil, imm, acc, imm, ind, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
+        imm, xin, imm, xin, zpg, zpg, zpg, zpg, nil, imm, nil, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpy, zpy, nil, aby, nil, aby, abx, abx, aby, aby,
+        imm, xin, imm, xin, zpg, zpg, zpg, zpg, nil, imm, nil, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpy, zpy, nil, aby, nil, aby, abx, abx, aby, aby,
+        imm, xin, imm, xin, zpg, zpg, zpg, zpg, nil, imm, nil, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
+        imm, xin, imm, xin, zpg, zpg, zpg, zpg, nil, imm, nil, imm, abs, abs, abs, abs,
+        rel, iny, nil, iny, zpx, zpx, zpx, zpx, nil, aby, nil, aby, abx, abx, abx, abx,
     ];);
 }
 
@@ -542,7 +542,7 @@ mod ops {
         ($f: ident, $from: ident, $to: ident) => (fn $f(cpu: &mut CPU) {
             let mut status = cpu.status & !(ZERO_FLAG | NEG_FLAG);
             let res = cpu.$from;
-            cpu.$to = res; 
+            cpu.$to = res;
             check_zero!(status, res);
             check_neg!(status, res);
             cpu.status = status;
diff --git a/src/ppu.rs b/src/ppu.rs
index 2839acf..4ebe01f 100644
--- a/src/ppu.rs
+++ b/src/ppu.rs
@@ -97,6 +97,7 @@ impl<'a> PPU<'a> {
             false => {
                 self.t = (self.t & 0x7fe0) | (data >> 3);
                 self.x = (data & 0x07) as u8;
+                assert!(self.x == 0);
                 self.w = true;
             },
             true => {
@@ -123,7 +124,7 @@ impl<'a> PPU<'a> {
 
     pub fn read_data(&mut self) -> u8 {
         let data = self.mem.read(self.v);
-        let res = if self.v < 0x3f00 {
+        let res = if self.v & 0x3fff < 0x3f00 {
             let prev = self.buffered_read;
             self.buffered_read = data;
             prev
@@ -372,7 +373,7 @@ impl<'a> PPU<'a> {
         } else { 0 }
     }
 
-    #[inline(always)] 
+    #[inline(always)]
     fn get_sp_pidx(&self, i: usize) -> u8 {
         if self.get_show_sp() {
             ((self.sp_bitmap[i][1] & 1) << 1) | (self.sp_bitmap[i][0] & 1)
-- 
cgit v1.2.3-70-g09d2