zx spectrum

3-inch Treasures: Transferring Material from Amstrad Floppy Disks | by Leontien Talboom | Digital Preservation at Cambridge University Libraries and Archives (digitalpreservation-blog.lib.cam.ac.uk)

https://digitalpreservation-blog.lib.cam.ac.uk/3-inch-treasures-transferring-material-from-amstrad-floppy-disks-52e1422a6b82?gi=a5b13b3c9cf2

solhsa.com - X80 Tutorials (solhsa.com)

https://solhsa.com/z80/index.html

Building a game for the Spectrum from scratch in Z80 using sjasmplus

External floppy drive cable for the Spectrum +3 (zxnet.co.uk)

https://zxnet.co.uk/spectrum/plus3_external_floppy_cable

Dumping Spectrum +3 Disks (tzxvault.org)

http://www.tzxvault.org/help.htm

Mounting a 3" disc drive on a PC (fvempel.nl)

http://www.fvempel.nl/3pc.html