Acorn Archimedes A540: Revision history

23 September 2026

• curprev 02:5102:51, 23 September 2026 Josh talk contribs 9,162 bytes +2,231 Rewrite with citations from the newly hosted Acorn Archimedes 500 / R200 Service Manual and Chris Whytehead. Corrected: SCSI is a podule that occupies a slot, not on the motherboard, so all four slots are NOT free; the SCSI controller is a WD33C93A not an NCR 53C90; the FPA11 is not an A540 part. Added BT1 NiCd 1.2 V 280 mAh with the 2.8 V on IC22 pin 8 check, the MEMC part-number warning and the FPA10 price and early-card modification. Removed the unsourced oscillator frequencies, motherboar... undo

29 September 2025

• curprev 18:0718:07, 29 September 2025 Josh talk contribs 6,931 bytes −876 →Market Position undo
• curprev 17:0817:08, 29 September 2025 Josh talk contribs 7,807 bytes −12,820 No edit summary undo
• curprev 16:5816:58, 29 September 2025 Josh talk contribs 20,627 bytes −87 →Memory System undo

10 September 2025

• curprev 22:0122:01, 10 September 2025 Josh talk contribs 20,714 bytes 0 →ARM3 Processor undo
• curprev 22:0122:01, 10 September 2025 Josh talk contribs 20,714 bytes +20,714 Created page with "{{Infobox computer | name = Acorn Archimedes A540 | image = 250px | caption = Acorn Archimedes A540 | manufacturer = Acorn Computers Ltd | type = Personal Computer | release date = September 1990 | discontinued = 1992 | price = £2,995 (1990) | cpu = ARM3 @ 26 MHz | memory = 4 MB RAM (expandable to 16 MB) | storage = 3.5" floppy drive (1.6 MB), 100 MB SCSI hard drive | display..." Tag: Visual edit: Switched