Editing Acorn Electron (section)

=====Further developments=====

After Acorn's change of focus away from the Electron, and with a shortage of Plus 1 units available to purchase, Advanced Computer Products secured the rights to manufacture the unit under licence from Acorn,<ref name="abcomputing198708" /> obtaining the injection moulds and tooling, thus restarting production in 1987 after Acorn's own production of the unit had ceased in November 1985.<ref name="electronuser198703">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume4/Electron-User-04-06/page/n4/mode/1up | title=Plus 1 going back into production | magazine=Electron User | volume=4 | issue=6 | date=March 1987 | access-date=18 January 2021 | page=5 }}</ref> The Advanced Plus 2 (AP2) ROM was later sold by PRES as a replacement ROM for the Plus 1, of whose 8&nbsp;KB utility ROM only 3&nbsp;KB had been used, thus providing an opportunity for a more comprehensive ROM to be developed. The AP2 added ROM management commands familiar from the [[BBC Master]] series, support for various sideways RAM products from PRES, disc formatting and verification utilities for different ADFS versions, a command to disable the Plus 1 entirely, and improvements that made tape loading more reliable in "high memory" screen modes.<ref name="electronuser198807_ap2">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume5/Electron-User-05-10/page/n24/mode/1up | title=More power under your bonnet | magazine=Electron User | date=July 1988 | access-date=30 October 2022 | last1=Nixon | first1=Chris | pages=25 }}</ref>