Has anyone with a DevKit and a second disc drive tried the BACKUP command of BASIC 10?
It seems that the backup command only works with dual disc drives (e.g. like 8250) or with the build-in C65 drive and an external 1565, but not with an external 1581 or 1541 (serial port).
So it seems that this BASIC10 command is nearly "useless" nowadays (with the MEGA65)? 
Zitat von c65manualupdated.txtAlles anzeigenBACKUP -- Backup an entire disk from one drive to another
BACKUP Dsource_drive TO Ddestination_drive [<ON|,>Udevice]
This command copies all the files on a diskette to another on a dual
drive system only. It cannot backup diskettes using CBM serial bus
type drives, for example. If the destination diskette is unformatted,
BACKUP will automatically format it. BACKUP copies every sector, so
any data already on the destination diskette will be overwritten. To
copy specific files from one drive to another, use the COPY command.
NOTE: This command can only be used with a dual disk drive, such as
the built-in C64DX drive and optional F016-type expansion drive. To
backup diskettes using different drives, such as the built-in drive
and a 1581-type serial bus drive, use a utility program.
BACKUP D0 to D1 Copies all files from the disk in
drive 0 to the disk in drive 1.
BACKUP D0 TO D1, ON U9 Copies all files from drive 0 to
drive 1 in disk drive unit 9.
