TI Disk format

See File systems for details of

the Floppy Disk File System

• Volume Information Block
• File Descriptor Index Record
• File Descriptor Records
• Allocation Bit Map

and the Hard Disk File System

• Volume Information Block (HFDC)
• Volume Information Block (SCSI)
• Directory Descriptor Records
• File Descriptor Index Records
• File Descriptor Records
• Allocation Bit Map

Detailed description of disc format

A single sided single density 90k diskette used with the T.I. Disc Controller has the following specifications:

• Diskette type: SA 104 (ANSI standard 5.25")
• Encoding method: FM single density
• Capacity: 92l6O bytes per disc
• Track size: 2304 bytes
• Sector size: 256 bytes
• Tracks per side: 40 tracks
• Sectors per track: 9 sectors

See the BASIC program Disk directory reader in BASIC.