private bool FnStartSub(uint scr, uint b, uint c)
{
_compact.Core.mode += 4;
SkyCompact.GetSub(_compact, _compact.Core.mode).Field = (ushort)(scr & 0xffff);
SkyCompact.GetSub(_compact, (ushort)(_compact.Core.mode + 2)).Field = (ushort)(scr >> 16);
return false;
}