Message from Roberto Berner:
>Comments: The monitor ROM has 1K extention, and the memory map decoder
>line selects an 8K block, so the JBUG monitor "mirrors" 8 times across
>that 8K block boundaries. You will find the same memory contents in
>$E000 , $E400 , $E800 , $EC00 , $EF00 , $F000 ... etc. I have learned
>almost everything I know with this excellent tool. Greetings from
>Buenos Aires, Argentina.