Class: NADOLDos

Inherits:
FileSystem show all
Defined in:
lib/file_systems/NADOLDos.rb

Overview

low byte hi byte

Class Method Summary collapse

Methods inherited from FileSystem

all_file_systems, code_for_tests, compatability_score, is_valid_file_system_if, matching_score, non_matching_score

Methods included from SubclassTracking

extended

Class Method Details

.files(file_system_image) ⇒ Object 



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# File 'lib/file_systems/NADOLDos.rb', line 46

def NADOLDos.files(file_system_image)
  files=FileContainer.new
  track=0
  sector=3
  while (sector<=9) do
    sector_data=file_system_image.get_sector(track,sector)
    (0..15).each do |slot_no|
      slot_offset=slot_no*0x10
      file_descriptive_entry=sector_data[slot_offset..slot_offset+0x10]
      if (file_descriptive_entry[0]!=0xFF && file_descriptive_entry[0]!=0x00) then # skip deleted /empty files
        filename=""
        file_descriptive_entry[0..11].to_s.each_byte{|b| filename+=(b.%128).chr} #strip off high bit
        filename.sub!(/ *$/,"") #strip off trailing spaces
        file_size=file_descriptive_entry[0x0D]*256+file_descriptive_entry[0x0C]
        if (file_size>0) then
          contents=""
          ts_list_track_no=file_descriptive_entry[0x0E]
          ts_list_sector_no=file_descriptive_entry[0x0F]
          ts_list_sector=file_system_image.get_sector(ts_list_track_no,ts_list_sector_no)
  
          for entry_number in 0..0x7f    
            data_track_no=ts_list_sector[entry_number*2]
            data_sector_no=ts_list_sector[entry_number*2+1]
            if( (data_track_no!=0 || data_sector_no!=0)   && data_sector_no<=0x0f) then                
              contents<<file_system_image.get_sector(data_track_no,data_sector_no)
            end
          end
          contents=contents[0,file_size]
          files<<NativeFileType.best_fit(file_system_image,filename,contents)
        end
      end
    end
  sector+=1
  end

  files
end

.host_system ⇒ Object 



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# File 'lib/file_systems/NADOLDos.rb', line 32

def self.host_system
  Apple2
end