Apple IIe - Page 205

Cassette and Disk Storage with the Apple lie 205
Configuration
VERIFY filename[, Sx , Vx, Dx]
VERIFY
uses the checksum value for each sector to determine
whether or not that sector was copied correctly . The checksum
value is calculated using the numeric value of each character in
the sector, and is stored in the sector.
VERIFY
recomputes the checksum for each sector in the file and
then compares these computed checksums with those stored in
the sector. If there are any discrepancies, the following error
message will appear:
110 ERROR
If the computed and stored check sums agree, the BASIC prompt
will be displayed.
MON&NOMON
MON is an abbreviation for MONITOR . The MON command is
used to display information related to disk input and output . The
NOMON command will turn the display off again.
MON is useful when debugging a program . Generally , data
transferred
between the screen and disk drives is not displayed.
MON allows this data to be displayed, which can be helpful
during the debugging process.
Configuration
MON [ C ] [ , I ] [ , 0 ]
NOMON [ C ] [, I ] [ , 0 ]
C indicates
that commands to the disk are to be monitored. (e x.
OPEN, READ, WRITE, etc).