// Set attributed characters into section
public void SetAttrChrs(string s, int offset)
{
byte[] data = MB.FormatOutput(BaseAttr.Data, s);
Buffer.BlockCopy(data, 0, b, offset * 2, data.Length); // Fast move?
MB.LogIt($"BSet[{MB.GetNozzle(BaseAttr)}{BaseAttr.Val:X4}+{offset:X4}] {MB.GetAttributeName(BaseAttr.Class, BaseAttr.Val)} = " +
$"{MB.FormatText(data)}");
}