From: Hugo Villeneuve <hugo@hugovil.com>
Date: Sun, 17 Nov 2013 22:03:19 +0000 (-0500)
Subject: Fix error with ADD instruction and AC bit
X-Git-Tag: v2.0.0~94
X-Git-Url: http://gitweb.hugovil.com/?a=commitdiff_plain;h=b7f56a8019a6ca79fc633c97e9f542388c5f2ed2;p=emu8051.git

Fix error with ADD instruction and AC bit

The overflow bit was written instead of the auxiliary carry bit.
---

diff --git a/src/opcode2c.pl b/src/opcode2c.pl
index 67c667f..dcb6894 100755
--- a/src/opcode2c.pl
+++ b/src/opcode2c.pl
@@ -468,7 +468,7 @@ for ($i=0 ; $i< 256; $i++) {
 	    print INST_IMP "   cpu8051_WriteD( _PSW_, ( cpu8051_ReadD( _PSW_ ) | 0x80 ) );\n";
 	    print INST_IMP "   if ( ( destination & 0x7F ) + ( source & 0x7F ) < 0x80 )  cpu8051_WriteD( _PSW_, ( cpu8051_ReadD( _PSW_ ) | 0x04 ) );\n";
 	    print INST_IMP "} else if ( ( destination & 0x7F ) + ( source & 0x7F ) > 0x7F )  cpu8051_WriteD( _PSW_, ( cpu8051_ReadD( _PSW_ ) | 0x04 ) );\n";
-	    print INST_IMP "if ( ( destination & 0x0F ) + ( source & 0x0F ) > 0x0F )   cpu8051_WriteD( _PSW_, ( cpu8051_ReadD( _PSW_ ) | 0x04 ) );\n";
+	    print INST_IMP "if ( ( destination & 0x0F ) + ( source & 0x0F ) > 0x0F )   cpu8051_WriteD( _PSW_, ( cpu8051_ReadD( _PSW_ ) | 0x40 ) );\n";
 	    print INST_IMP "destination += source;\n";
 	}