protected byte[] ReadBytesAt(ushort address, ushort numberOfBytes, bool timing)
{
if (!_initialised)
{
throw new MemoryNotInitialisedException();
}
uint availableBytes = numberOfBytes;
if (address + availableBytes >= SizeInBytes)
{
availableBytes = SizeInBytes - address; // if this read overflows the end of memory, we can read only this many bytes
}
IMemorySegment segment = _map.SegmentFor(address);
if (segment == null)
{
return(new byte[numberOfBytes]); // if memory is not allocated return all 0x00s
}
if (!timing && segment.SizeInBytes - AddressOffset(address, segment) >= numberOfBytes)
{
// if the read fits entirely within the memory segment and we aren't generating read timing, then optimise for speed
return(segment.ReadBytesAt(AddressOffset(address, segment), numberOfBytes));
}
else
{
byte[] bytes = new byte[numberOfBytes];
for (int i = 0; i < availableBytes; i++)
{
bytes[i] = ReadByteAt((ushort)(address + i), timing);
}
return(bytes); // bytes beyond the available byte limit (if any) will be 0x00
}
}
