seti $printhelp = $printhelp
seti $help = $help
if $help = 1
  echo 'Western Digital ROYL dump all modules using vendor specific commands.'
  echo 'This will dump the sectors of the modules to the files "modulexxxx.bin".'
  echo 'Note that some USB drives do not support these vendor specific commands.'
  if $printhelp = 1
    exit 0
  endif
  echo 'Hit ENTER to continue...'
  userinput $choicestring
  previousscript
endif

include good_subroutines

# set the filename to be read
sets $filename = "mod01.bin"


# read the sectors from the file
readscratchpad $filename 0 0 $scratchpad_size
# show it on the screen
#printscratchpad 0 $scratchpad_size

# disable vendor specific commands
buffersize 0
setreadpio
ata28cmd 0x44 0x0b 0x00 0x44 0x57 0xa0 0x80
# check if command failed
gosub status_check


# process the module
echo "Header:"
printscratchpad 0 4
seti $mod_id = scratchpad 8 w
hex
echo "Module ID = 0x" $mod_id
echo "Size in sectors = 0x" $mod_length_sectors
seti $checksum = scratchpad 0xc dw
echo "32 bit checksum = 0x" $checksum
seti $total_records = scratchpad 0x30 w
echo "Total records = 0x" $total_records
decimal
sets $header = scratchpad 0 4
sets $header_check = "ROYL"
if $header != $header_check
  echo "Header is not 'ROYL', exiting"
  previousscript
endif

# calculate checksum
seti $calculated_checksum = 0
seti $count = 0
while $count < $scratchpad_size
  seti $dword = scratchpad $count dw
  seti $calculated_checksum = $calculated_checksum + $dword
  seti $count = $count + 4
  # skip the actual checksum bytes
  if $count = 0xc
    seti $count = $count + 4
  endif
done
seti $calculated_checksum = $calculated_checksum & 0xffffffff
seti $calculated_checksum = 0xffffffff - $calculated_checksum
seti $calculated_checksum = $calculated_checksum + 1
if $checksum = $calculated_checksum
  sets $message = " (good)"
else
  sets $message = " (BAD)"
endif
hex
echo "Calculated Checksum = 0x" $calculated_checksum $message
decimal
if $checksum != $calculated_checksum
  echo "Calculated checksum does not match actual, exiting"
  previousscript
endif

# process the data records
seti $record_count = 0
seti $offset = 0x32
echo ""
while $record_count < $total_records
  seti $record_count = $record_count + 1
  seti $record_length = scratchpad $offset b
  seti $next_record_offset = $offset + $record_length
  seti $offset = $offset + 2
  seti $module_id = scratchpad $offset w
  seti $offset = $offset + 2
  seti $module_size = scratchpad $offset w
  hex
  echo "Module ID = 0x" $module_id "  Size in sectors = 0x" $module_size
  decimal
  seti $offset = $next_record_offset

done




previousscript
end