CPX CPY opcodes

drhelius · Jul 1, 2024 · a487568 · a487568
1 parent 4979778
commit a487568
Show file tree

Hide file tree

Showing 2 changed files with 14 additions and 8 deletions.
diff --git a/src/huc6280_opcodes.cpp b/src/huc6280_opcodes.cpp
@@ -1301,7 +1301,8 @@ void HuC6280::OPCode0xBF()
 
 void HuC6280::OPCode0xC0()
 {
-    // CPY #$n
+    // OK
+    // CPY #nn
     OPCodes_CMP(&m_Y, ImmediateAddressing());
 }
 
@@ -1329,7 +1330,8 @@ void HuC6280::OPCode0xC3()
 
 void HuC6280::OPCode0xC4()
 {
-    // CPY $n
+    // OK
+    // CPY ZZ
     OPCodes_CMP(&m_Y, m_memory->Read(ZeroPageAddressing()));
 }
 
@@ -1381,7 +1383,8 @@ void HuC6280::OPCode0xCB()
 
 void HuC6280::OPCode0xCC()
 {
-    // CPY $nn
+    // OK
+    // CPY hhll
     OPCodes_CMP(&m_Y, m_memory->Read(AbsoluteAddressing()));
 }
 
@@ -1517,7 +1520,8 @@ void HuC6280::OPCode0xDF()
 
 void HuC6280::OPCode0xE0()
 {
-    // CPX #$n
+    // OK
+    // CPX #nn
     OPCodes_CMP(&m_X, ImmediateAddressing());
 }
 
@@ -1543,7 +1547,8 @@ void HuC6280::OPCode0xE3()
 
 void HuC6280::OPCode0xE4()
 {
-    // CPX $n
+    // OK
+    // CPX ZZ
     OPCodes_CMP(&m_X, m_memory->Read(ZeroPageAddressing()));
 }
 
@@ -1592,7 +1597,8 @@ void HuC6280::OPCode0xEB()
 
 void HuC6280::OPCode0xEC()
 {
-    // CPX $nn
+    // OK
+    // CPX hhll
     OPCodes_CMP(&m_X, m_memory->Read(AbsoluteAddressing()));
 }
 

diff --git a/src/huc6280_timing.h b/src/huc6280_timing.h
@@ -37,9 +37,9 @@ const u8 k_opcode_tstates[256] =
 /* 0x90 */  2, 6, 2, 6, 4, 4, 4, 4, 2, 5, 2, 5, 5, 5, 5, 6,
 /* 0xA0 */  2, 6, 2, 6, 3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 6,
 /* 0xB0 */  2, 5, 2, 5, 4, 4, 4, 4, 2, 4, 2, 4, 4, 4, 4, 6,
-/* 0xC0 */  2, 7, 2, 8, 3, 4, 5, 5, 2, 2, 2, 2, 4, 5, 6, 6,
+/* 0xC0 */  2, 7, 2, 8, 4, 4, 5, 5, 2, 2, 2, 2, 5, 5, 6, 6,
 /* 0xD0 */  2, 7, 7, 8, 4, 4, 6, 6, 2, 5, 2, 7, 4, 5, 7, 6,
-/* 0xE0 */  2, 6, 2, 8, 3, 3, 5, 5, 2, 2, 2, 2, 4, 4, 6, 6,
+/* 0xE0 */  2, 6, 2, 8, 4, 3, 5, 5, 2, 2, 2, 2, 5, 4, 6, 6,
 /* 0xF0 */  2, 5, 2, 8, 4, 4, 6, 6, 2, 4, 2, 7, 4, 4, 7, 6
 };