ShuriZma
/
stella
mirror of https://github.com/stella-emu/stella.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

The 6507's B flag appears to be tied to high so there's no way to 

clear the flag.  This has been verified using a real 2600 by writing
a program which clears the B flag and then displaying the contents
of the status register.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1124 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
bwmott 2006-09-04 00:11:38 +00:00
parent ca78e39ca8
commit 294df2414d
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
stella/src/emucore/m6502/src/M6502.cxx
View File

@ -13,7 +13,7 @@
// See the file "license" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//
// $Id: M6502.cxx,v 1.17 2006-08-31 02:31:29 bwmott Exp $
// $Id: M6502.cxx,v 1.18 2006-09-04 00:11:38 bwmott Exp $
//============================================================================
#include "M6502.hxx"
@ -139,7 +139,7 @@ void M6502::PS(uInt8 ps)
{
N = ps & 0x80;
V = ps & 0x40;
B = ps & 0x10;
B = true; // B = ps & 0x10; The 6507's B flag always true
D = ps & 0x08;
I = ps & 0x04;
notZ = !(ps & 0x02);