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Added 4A50 bankswitch autodetection. Currently, it only works with one 

ROM that follows the specs.  Also, it seems the final ROM that wasn't
working with this scheme actually *does* work; it just doesn't work
when display format autodetection is turned on.  So that's what I'll
work on next.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1401 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena 2008-02-22 15:29:52 +00:00
parent c1f887f731
commit f3c1b6308a
1 changed files with 6 additions and 3 deletions
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9
stella/src/emucore/Cart.cxx
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@ -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: Cart.cxx,v 1.37 2008-02-19 12:33:03 stephena Exp $
// $Id: Cart.cxx,v 1.38 2008-02-22 15:29:52 stephena Exp $
//============================================================================
#include <cassert>
@ -428,8 +428,11 @@ bool Cartridge::isProbablyUA(const uInt8* image, uInt32 size)
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool Cartridge::isProbably4A50(const uInt8* image, uInt32 size)
{
// TODO - add autodetection for this type
return false;
// 4A50 carts store address $4A50 at the NMI vector, which
// in this scheme is always in the last page of ROM at
// $1FFA - $1FFB
int idx = size - 6; // $1FFA
return (image[idx] == 0x50 && image[idx+1] == 0x4A);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -