FIZ TOOLS V.1.2

It has the following options:
1. DISK -> TAPE (BACKUP - saves a disk onto tape)
2. TAPE -> DISK (RESTORE - reads in a tape and saves it to disk)
3. READ TRACK MAP 
4. FORMAT A DISK
8. Save this program to tape (the Fiz Tools program)
9. Save this program to disk (the Fiz Tools program - you must have a formatted disk ready)

Example to restore disk from a master tape:

- Load FizBackup.tap into the spectrum (with FIZ attached)
- (OPTIONAL) Select option 9 to save the Fiz Tools program to a disk (the disk must already be formatted)
- Select option 2 (TAPE -> DISK)
- Insert a disk to overwrite (it does not need to be formatted, it will get overwritten completely)
-Play X_master.tap when requested (start and stop the tape, when requested)

Backing up/restoring, it will report which track an error occurred on 
and if the ROM is not using the "read track" patch, it will add it to be more robust.


3. READ TRACK MAP
FIZ Track reads the track map from the disk and tells you what is on each track.

Track map bytes:
For track 0, the two numbers appear to be a 16-bit counter that increases
by 1 every time the directory is updated.
For tracks 1-39:
The first number holds flags:
Bit 7 set = this track is used
Bit 6 set = this is the last track used by this file.
Bits 5-2 = not used?
Bits 1-0 = file type (0 = empty track,  1= ARRAY,  2 = BASIC, 3 = CODE)
(Value 127 seems to mean a BAD track)
The second byte is the "track within file" byte, starting from 1. 
So, a file on 3 tracks would have entries with 1, 2, and 3.
NOTE: the "flag" byte can be 0 with the filename and "track within file" byte still in place, 
suggesting that an "undelete" command might be possible.

4. FORMAT A DISK
Format applies patch for the ND command