View source for ZX Spectrum Beta Disc 3.5" floppy

{{FormatInfo
|formattype=physical
|subcat=Floppy disk
}}
The '''ZX Spectrum Beta Disc 3.5" floppy''' is the 3 1/2" disk format used with ZX Spectrum computers, with the [[TR-DOS filesystem]].

5¼" and 3½" floppies are used with the following formats (sources are unclear as to which of these formats are used with each of the sizes):

{| class="wikitable"
!Number of tracks per side
!Number of sides
!Number of tracks (total)
!Number of sectors
!Number of bytes
|-
|80
|2
|160
|2560
|655360
|-
|40
|2
|80
|1280
|327680
|-
|80
|1
|80
|1280
|327680
|-
|40
|1
|40
|640
|163840
|}

Diskettes can be dumped to [[TRD]] files for use in emulators.

== Links ==
* [https://web.archive.org/web/20140409113112/http://k1.dyndns.org/Vintage/Sinclair/82/Peripherials/Disc%20Interfaces/Beta%20128%20Disc%20Interface%2C%20TRDOS%20%28Technology%20Research%29/TRDOS/TR-DOS%20Programming.txt Internal TR-DOS functions]
* [https://www.worldofspectrum.org/hardware/feat28.html Ad/review for disk drive]

[[Category:ZX Spectrum]]