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Minor optimization in the EEPROM emulation code; we only initialize 

data when necessary.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1509 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena 2008-05-15 19:05:09 +00:00
parent bba25a39d8
commit 0a00daf111
1 changed files with 9 additions and 8 deletions
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17
stella/src/emucore/MT24LC256.cxx
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@ -13,7 +13,7 @@
// See the file "license" for information on usage and redistribution of // See the file "license" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES. // this file, and for a DISCLAIMER OF ALL WARRANTIES.
// //
// $Id: MT24LC256.cxx,v 1.10 2008-05-11 21:18:35 stephena Exp $ // $Id: MT24LC256.cxx,v 1.11 2008-05-15 19:05:09 stephena Exp $
//============================================================================ //============================================================================
#include <cassert> #include <cassert>
@ -58,10 +58,7 @@ MT24LC256::MT24LC256(const string& filename, const System& system)
myDataFileExists(false), myDataFileExists(false),
myDataChanged(false) myDataChanged(false)
{ {
// First initialize the I2C state // Load the data from an external file (if it exists)
jpee_init();
// Now load the data from an external file (if it exists)
ifstream in; ifstream in;
in.open(myDataFile.c_str(), ios_base::binary); in.open(myDataFile.c_str(), ios_base::binary);
if(in.is_open()) if(in.is_open())
@ -78,6 +75,9 @@ MT24LC256::MT24LC256(const string& filename, const System& system)
} }
else else
myDataFileExists = false; myDataFileExists = false;
// Then initialize the I2C state
jpee_init();
} }
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@ -156,9 +156,10 @@ void MT24LC256::jpee_init()
jpee_pagemask = 63; jpee_pagemask = 63;
jpee_smallmode = 0; jpee_smallmode = 0;
jpee_logmode = -1; jpee_logmode = -1;
for(int i = 0; i < 256; i++) if(!myDataFileExists)
for(int j = 0; j < 128; j++) for(int i = 0; i < 256; i++)
myData[i + j*256] = (i+1)*(j+1); for(int j = 0; j < 128; j++)
myData[i + j*256] = (i+1)*(j+1);
} }
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -