Fix a quirk flag check

leonmavr · Aug 20, 2024 · 5e04c25 · 5e04c25
1 parent e8db4ef
commit 5e04c25
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/roms/Space_Invaders.cfg b/roms/Space_Invaders.cfg
@@ -6,7 +6,7 @@
 # Author: David Winter
 # Controls:
 0x4: Left
-0x5: Shoot
+0x5: Shoot/start
 0x6: Right
 
 400

diff --git a/src/chip8.cpp b/src/chip8.cpp
@@ -290,7 +290,7 @@ void Chip8::Exec(const opcode_t& opc) {
     X("ADD Vx Vy"  , prefix == 0x8 && n == 0x4     , uint16_t sum = Vx + Vy; Vx = sum & 0xFF; Vf = sum > 0xFF;) \
     X("SUB Vx Vy"  , prefix == 0x8 && n == 0x5     , Vf = Vx >= Vy; Vx = (Vx - Vy) & 0xFF;) \
     X("SHR Vx Vy"  , prefix == 0x8 && n == 0x6     , Vf = Vx & 0x1; \
-                                                     if (!use_quirks_) \
+                                                     if (use_quirks_) \
                                                          Vx >>= 1; \
                                                      else \
                                                          Vx = Vy >> 1;) \