Changes

Jump to navigation Jump to search
no edit summary
Line 28: Line 28:     
== Blocks ==
 
== Blocks ==
 +
On the tape every block is started with a marker byte (0x00 for header and 0xff for data blocks) and ended with a checksum byte.
 +
 +
The checksum byte is not really a sum, but a binary XOR of all header/data bytes.
 +
 
=== Header block ===
 
=== Header block ===
 
The header, which is 17 bytes long, is as follows:
 
The header, which is 17 bytes long, is as follows:
Line 139: Line 143:  
|}
 
|}
   −
''(Of course on the tape there are two more bytes: a 0xff -- marker of data block -- at the beginning and a checksum byte at the end.)''
+
Note: although the array name is saved, you cannot just ''LOAD "" DATA'', you have to explicitly say where to load: e.g. ''LOAD "" DATA w()'', but you can use any letter regardless of the original array name.
 
  −
Note: although the array name is saved, you cannot just ''LOAD "" DATA'', you have to explicitly say where to load: e.g. ''LOAD "" DATA w()'', but you can use any letter regardless of the original name.
      
==== BASIC programs ====
 
==== BASIC programs ====
103

edits

Navigation menu