Changes
/* Notes */
*LineCount for the line number.
*LineCycle for the µs count on the current line.
*MMR MemPage for the 64K expansion memory mapping registerpage (0-63).*MemBankMode for the 16K expansion memory bank paging mode (0-7).
*UpperROMOn for the paging state of the upper ROM.
*UpperROMNum for the selected upper ROM number.
