Changes
| 17 || Last block || Tape only, set to 0
|-
| 18 || File type || As per cassette: Bit0 = Protection (set if protected)
Bits1..3 = File contents (0:BASIC, 1:Binary, 2:Screen image, 3:ASCII, 4..7 are unallocated)
Bits4..7 = Version (ASCII files should be version 1, all other files should be version 0)
|-
| 19..20 || Data length || The As per cassette: the number of data bytes in the data record. As per cassette
|-
| 21..22 || Data location || Where As per cassette: where the data was written from originally. As per cassette
|-
| 23 || First block || Set to #FF, only used for output files
|-
| rowspan="3" | User || 24..25 || Logical length || Actual As per cassette: actual file length is here. As per cassette
|-
| 26..27 || Entry address || The As per cassette: the execution address for machine code programs. As per cassette
|-
| 28..63 || Unused || As per cassette
