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Fix //c memory blast fill constant with actual 0xA0.

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Remove MemReturnRandomData(), replace with getRandomTime()
This commit is contained in:
michaelangel007 2014-07-16 08:41:45 -07:00
parent 7b3eac2ca4
commit 2719de8a09
1 changed files with 22 additions and 15 deletions
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37
source/Memory.cpp
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@ -1357,6 +1357,11 @@ void MemInitialize()
MemReset();
}
inline DWORD getRandomTime()
{
return rand() ^ timeGetTime(); // We can't use g_nCumulativeCycles as it will be zero on a fresh execution.
}
//===========================================================================
// Called by:
@ -1385,8 +1390,8 @@ void MemReset ()
// F2. Ctrl-F2. CALL-151, C050 C053 C057
// OR
// F2, Ctrl-F2, F7, HGR
srand (time(NULL));
g_eMemoryInitPattern = static_cast<MemoryInitPattern_e>( rand() % NUM_MIP );
DWORD clock = getRandomTime();
g_eMemoryInitPattern = static_cast<MemoryInitPattern_e>( clock % NUM_MIP );
if( g_eMemoryInitPattern == MIP_ZERO )
g_eMemoryInitPattern = MIP_FF_FF_00_00;
@ -1402,10 +1407,12 @@ void MemReset ()
// Exceptions: xx28 xx29 xx68 xx69 Apple //e
for( iByte = 0x0000; iByte < 0xC000; iByte += 512 )
{
memmain[ iByte + 0x28 ] = MemReturnRandomData( 1 );
memmain[ iByte + 0x29 ] = MemReturnRandomData( 0 );
memmain[ iByte + 0x68 ] = MemReturnRandomData( 1 );
memmain[ iByte + 0x69 ] = MemReturnRandomData( 0 );
clock = getRandomTime();
memmain[ iByte + 0x28 ] = (clock >> 0) & 0xFF;
memmain[ iByte + 0x29 ] = (clock >> 8) & 0xFF;
clock = getRandomTime();
memmain[ iByte + 0x68 ] = (clock >> 0) & 0xFF;
memmain[ iByte + 0x69 ] = (clock >> 8) & 0xFF;
}
break;
@ -1425,16 +1432,16 @@ void MemReset ()
{
memset( &memmain[ iByte ], 0xFF, 128 );
// Exceptions: Emulate the Apple //c cold start memory 'blaster' pattern
// 2010: C0 C0 2111:C0 C0
// 2414: C0 C0 2515:C0 C0
// 2818: C0 C0 2919:C0 C0
// Exceptions: Emulate the Apple //c cold start memory 'blaster' pattern at $FCCA
// 2010: A0 A0 2111:A0 A0
// 2414: A0 A0 2515:A0 A0
// 2818: A0 A0 2919:A0 A0
// etc.
int iBase = iByte - 0x80;
int iPage = iBase & 0x1FFF;
int iAddr = 0x10 + (iPage / 0x100);
memmain[ iBase + iAddr + 0 ] |= 0xC0;
memmain[ iBase + iAddr + 1 ] |= 0xC0;
memmain[ iBase + iAddr + 0 ] |= 0xA0;
memmain[ iBase + iAddr + 1 ] |= 0xA0;
}
break;
@ -1446,9 +1453,9 @@ void MemReset ()
// https://github.com/AppleWin/AppleWin/issues/206
// Work-around for a cold-booting bug in "Pooyan" which expects RNDL and RNDH to be non-zero.
DWORD clock = timeGetTime(); // We can't use g_nCumulativeCycles as it will be zero on a fresh execution.
memmain[ 0x4E ] = MemReturnRandomData(1) | (clock >> 0) & 0xFF;
memmain[ 0x4F ] = MemReturnRandomData(1) | (clock >> 8) & 0xFF;
clock = getRandomTime();
memmain[ 0x4E ] = 0x20 | (clock >> 0) & 0xFF;
memmain[ 0x4F ] = 0x20 | (clock >> 8) & 0xFF;
// SET UP THE MEMORY IMAGE
mem = memimage;