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Documented #206 existing and new -memclear options with "In Development" in History.txt

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-memclear 0 Initialize memory to zero
     -memclear 1 Initialize memory to random values
     -memclear 2 Initialize memory to 4 byte pattern: FF FF 00 00
     -memclear 3 Initialize memory to even pages FF, odd pages 00
     -memclear 4 Initialize memory to first half page 00, last half page FF
     -memclear 5 Initialize memory to first half page FF, last half page 00
     -memclear 6   Initialize memory to byte offset of page
                   (current memory address low byte)
     -memclear 7   Initialize memory to page address
                   (current memory address high byte)
This commit is contained in:
michaelangel007
2014-07-17 20:42:19 -07:00
parent f4b09e1f8f
commit a4bae75d2a
3 changed files with 53 additions and 5 deletions
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source/Memory.cpp
+29 -5
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@@ -1392,14 +1392,10 @@ void MemReset ()
// F2, Ctrl-F2, F7, HGR
DWORD clock = getRandomTime();
if ((g_nMemoryClearType >= 0) && (g_nMemoryClearType != MIP_RANDOM))
if (g_nMemoryClearType >= 0)
g_eMemoryInitPattern = static_cast<MemoryInitPattern_e>(g_nMemoryClearType);
else // random
{
g_eMemoryInitPattern = static_cast<MemoryInitPattern_e>( clock % NUM_MIP );
if (g_eMemoryInitPattern == MIP_RANDOM) // Twice Lucky! Force a choice.
g_eMemoryInitPattern = MIP_FF_FF_00_00;
}
switch( g_eMemoryInitPattern )
{
@@ -1442,6 +1438,34 @@ void MemReset ()
for( iByte = 0x0000; iByte < 0xC000; iByte += 256 )
memset( &memmain[ iByte ], 0xFF, 128 );
break;
case MIP_RANDOM:
unsigned char random[ 256 + 4 ];
for( iByte = 0x0000; iByte < 0xC000; iByte += 256 )
{
for( int i = 0; i < 256; i++ )
{
clock = getRandomTime();
random[ i+0 ] ^= (clock >> 0) & 0xFF;
random[ i+1 ] ^= (clock >> 11) & 0xFF;
}
memcpy( &memmain[ iByte ], random, 256 );
}
break;
case MIP_PAGE_ADDRESS_LOW:
for( iByte = 0x0000; iByte < 0xC000; iByte++ )
memmain[ iByte ] = iByte & 0xFF;
break;
case MIP_PAGE_ADDRESS_HIGH:
for( iByte = 0x0000; iByte < 0xC000; iByte += 256 )
memset( &memmain[ iByte ], (iByte >> 8), 256 );
break;
default: // MIP_ZERO -- nothing to do
break;
}
// https://github.com/AppleWin/AppleWin/issues/206