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Added bankswitch autodetection for SUPERbank (SB) ROMS in both 128K 

and 256K versions.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1695 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena 2009-04-11 19:48:25 +00:00
parent a7d6615ccc
commit 8a129fa94f
3 changed files with 22 additions and 7 deletions
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24
stella/src/emucore/Cart.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: Cart.cxx,v 1.51 2009-04-10 15:04:31 stephena Exp $
// $Id: Cart.cxx,v 1.52 2009-04-11 19:48:25 stephena Exp $
//============================================================================
#include <cassert>
@ -280,7 +280,7 @@ string Cartridge::autodetectType(const uInt8* image, uInt32 size)
else
type = "MB";
}
else if(size == 131072) // 128K
else if(size == 128*1024) // 128K
{
if(isProbably3E(image, size))
type = "3E";
@ -293,6 +293,15 @@ string Cartridge::autodetectType(const uInt8* image, uInt32 size)
else
type = "MC";
}
else if(size == 256*1024) // 256K
{
if(isProbably3E(image, size))
type = "3E";
else if(isProbably3F(image, size))
type = "3F";
else /*if(isProbablySB(image, size))*/
type = "SB";
}
else // what else can we do?
{
if(isProbably3E(image, size))
@ -467,8 +476,15 @@ bool Cartridge::isProbably4A50(const uInt8* image, uInt32 size)
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool Cartridge::isProbablySB(const uInt8* image, uInt32 size)
{
// TODO - add autodetection for this type
return false;
// SB cart bankswitching switches banks by accessing address 0x0800
uInt8 signature[2][3] = {
{ 0xBD, 0x00, 0x08 }, // LDA $0800,x
{ 0xAD, 0x00, 0x08 } // LDA $0800
};
if(searchForBytes(image, size, signature[0], 3, 1))
return true;
else
return searchForBytes(image, size, signature[1], 3, 1);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

4
stella/src/emucore/CartEF.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: CartEF.cxx,v 1.2 2009-04-05 19:02:56 stephena Exp $
// $Id: CartEF.cxx,v 1.3 2009-04-11 19:48:25 stephena Exp $
//============================================================================
#include <cassert>
@ -38,7 +38,7 @@ CartridgeEF::~CartridgeEF()
void CartridgeEF::reset()
{
// Upon reset we switch to bank 1
myCurrentBank = 1;
bank(1);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

1
stella/src/emucore/CartSB.cxx
View File

@ -164,7 +164,6 @@ bool CartridgeSB::patch(uInt16 address, uInt8 value)
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
uInt8* CartridgeSB::getImage(int& size)
{