public bool HasBASICJumpAddress(int DataStartAddress, out int SysAddress)
{
SysAddress = 0;
if ((DataStartAddress == 0x0801) ||
(DataStartAddress == 0x0800))
{
// validate basic header, look for jump address
// 00 08 00 0C 08 0A 00 9E 32 30 36 34 00 00 00
int dataPos = 0x0801 - DataStartAddress;
ushort pointerToNextLine = m_SourceData.UInt16At(dataPos);
ushort lineNumber = m_SourceData.UInt16At(dataPos + 2);
byte sysInstruction = m_SourceData.ByteAt(dataPos + 4);
if (sysInstruction != 0x9e)
{
// not a SYS command
return(false);
}
string sysAddress = "";
dataPos += 5;
while ((dataPos < m_SourceData.Length) &&
(m_SourceData.ByteAt(dataPos) != 0))
{
sysAddress += m_SourceData.ByteAt(dataPos).ToString("X2");
++dataPos;
}
GR.Memory.ByteBuffer sysAddrData = new GR.Memory.ByteBuffer();
if (!sysAddrData.AppendHex(sysAddress))
{
return(false);
}
SysAddress = GR.Convert.ToI32(sysAddrData.ToAsciiString());
return(true);
}
return(false);
}
