Editing Acorn Electron (section)

====Advanced Plus 5====
Despite Acorn's withdrawal from the Electron peripheral market, Baildon Electronics developed the Advanced Plus 5 (AP5) expansion,<ref name="ap5">{{ cite web | url=http://www.acornelectron.co.uk/info/electron/acp_pres/Advanced-Plus-5.html | title=Advanced Plus 5 | website=Acorn Electron World | access-date=28 December 2020 }}</ref> featuring Tube, 1&nbsp;MHz bus and user port interfaces, which plugged into a Plus 1 cartridge socket. This provided a sufficient level of compatibility that both the 6502 and [[Zilog Z80|Z80]] second processor products from Acorn were shown to work, providing a Tube implementation that was "as faithful as you can get", with it also being noted that the Electron being available for as little as £50 at that point in its commercial lifespan was a "very cheap way of getting a [[CP/M]] machine".<ref name="abcomputing198708">{{ cite news | url=https://archive.org/details/AB_Computing_1987-08_OCR/page/n67/mode/2up | title=Electron Plus 5 | work=A&B Computing | date=August 1987 | access-date=28 December 2020 | last1=Grace | first1=Clive | pages=68–70 }}</ref> Some differences in the memory map of the Electron meant that BBC Micro software would need modifications to work on the Electron with AP5. The price of the unit in late 1986 was £66.70.<ref name="electronuser198612">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume4/Electron-User-04-03/page/n66/mode/1up | title=Any port in a storm | magazine=Electron User | volume=4 | issue=3 | last1=Cook | first1=Mike | date=December 1986 | access-date=19 January 2021 | pages=67–68 }}</ref>

The additional facilities of the AP5 alongside the Tube interface permitted various expansions for the BBC Micro to be made available for the Electron. These included the Hybrid Music 5000<ref name="electronuser198810" /> and the AMX Mouse.<ref name="electronuser198612amx">{{ cite magazine | url=https://archive.org/details/ElectronUserVolume4/Electron-User-04-03/page/n4/mode/1up | title=Now Electron can have its own mouse | magazine=Electron User | volume=4 | issue=3 | date=December 1986 | access-date=21 January 2021 | page=5 }}</ref>