Editing Acorn Electron (section)

====Cumana Floppy Disc System====
Early in 1985,<ref name="electronuser198502">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume2/Electron-User-02-05/page/n5/mode/1up | title=Disc drive battle is joined | magazine=Electron User | date=February 1985 | access-date=13 January 2021 | page=6 }}</ref> Cumana released a cartridge-based interface providing support for double-density storage, a real-time clock and calendar for timestamping of files, and a spare ROM socket for user-fitted sideways ROMs.<ref name="cumana_disc_interface">{{ cite book | url=http://www.4corn.co.uk/archive/showpdfs/04%20Micro%20User-Electron%20User%20May%201985%20-%20Westminster/Cumana%20-%20electron%20disk%20drive%20interface.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.4corn.co.uk/archive/showpdfs/04%20Micro%20User-Electron%20User%20May%201985%20-%20Westminster/Cumana%20-%20electron%20disk%20drive%20interface.pdf |archive-date=2022-10-09 |url-status=live | title=Acorn Electron - Disc Drive Interface | publisher=Cumana Limited | date=March 1985 | access-date=21 March 2021 }}</ref> The filing system used was Cumana's own QFS, supporting 89 files per disc,<ref name="electronuser198507a">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume2/Electron-User-02-10/page/n44/mode/1up | title=It's great being two-faced and twice as dense | magazine=Electron User | date=July 1985 | access-date=13 January 2021 | page=45 }}</ref> PAGE at &E00,<ref name="electronuser198605c" /> a non-hierarchical catalogue, ten-character filenames, with a format not directly compatible with either of Acorn's DFS or ADFS.<ref name="electronuser198507">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume2/Electron-User-02-10/page/n27/mode/1up | title=The Cumana floppy disc system for the Electron: It's an impressive piece of work | magazine=Electron User | date=July 1985 | access-date=13 January 2021 | last1=Peters | first1=Nigel | page=28 }}</ref> The interface itself cost £149.95 when originally announced,<ref name="electronuser198502" /> but settled at around £115.95 including VAT, also being offered in a promotional bundle with a 5¼-inch drive for £224.15 including VAT.<ref name="electronuser198507b">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume2/Electron-User-02-10/page/n51/mode/1up | title=Disc power at a new low price! | magazine=Electron User | date=July 1985 | access-date=13 January 2021 | page=52 }}</ref> Later pricing put the interface at £74.95 including VAT.<ref name="electronuser198601">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume3/Electron-User-03-04/page/n9/mode/1up | title=Electron Double Density Disk Interface Super Saver | magazine=Electron User | volume=3 | issue=4 | date=January 1986 | access-date=17 January 2021 | page=10 }}</ref>