[nappyjim]

When I turn on the machine, it says "System Loading" and the green bar counts down from 100%. After about a minute or so, it says 'Check Sum Error'. The floppy drive seems to load other floppy disks fine, such as the parameter disk, so I dont think the drive is the issue.

In the book, it says for alarm "Sum Check Error" ( I dont know if Sum Check and Check Sum are synonymous) it says: "The contents of the system software have been lost." "Insert the system floppy disk into the drive once again and reload the system"

But I am trying to load the system floppy. Picture below.