Editing Psion Series 5 (section)

== Series 5 or 5mx? ==

They look almost identical, and '''their mainboards, screens and other internal components are different and not interchangeable'''.<ref name="wp" />

{| class="wikitable styled-table" style="width:100%; text-align:left;"
|+'''Series 5 against Series 5mx'''<ref name="wp" /><ref name="wuffs">Ash Wolf (Ninji), [https://wuffs.org/blog/building-a-psion-emulator "\"16 Shades of Grey\" — Building a Psion/EPOC32 Emulator"], 27 December 2019. Source for the CL-PS7110 / ARM710a identification on the Series 5, the Windermere / ARM710T identification on the 5mx, and the ETNA CompactFlash controller.</ref>
! !! Series 5 (1997) !! Series 5mx (1999)
|-
| '''Processor''' || '''ARM710a''' core in a '''Cirrus Logic CL-PS7110''' || '''ARM710T''' core in Psion's custom '''"Windermere"''' SoC
|-
| '''Clock''' || '''18.432 MHz''' || 36 MHz
|-
| '''RAM''' || 4 MB or 8 MB || 8 MB or 16 MB
|-
| '''Screen''' || 640 × 240 || 640 × 240, clearer panel
|-
| '''Screen ribbon''' || Series 5 type || '''A different part'''
|}

'''The screen ribbon cables are not the same''', which matters because that cable is the commonest failure on both machines.<ref name="r3uk">David Savery, [https://www.r3uk.com/index.php/tech-tips/34-disassembly-guides/9-psion-series-5mx-disassembly-and-screen-cable-repair "Psion Series 5MX disassembly and screen cable repair"], R3UK, 2004. Source for the screen ribbon failure mechanism and the statement that the 5mx uses a different screen ribbon from the Series 5.</ref>