Editing Archimedes 440 Service Manual

The '''Archimedes High Performance Computer Systems Model 440 Service Manual''' (Acorn part number 0476,155, Issue 1, November 1988) is Acorn's dealer service manual for the [[Acorn Archimedes A440|A440]], the 4 MB flagship of the original 1987 Archimedes range.

== What it contains ==

* '''Technical specification''' — 4 MB DRAM fitment, ROM options, the ST506/MFM hard disc subsystem, power ratings, dimensions and the internal backup battery (two AA alkaline cells).
* '''System description''' of the ARM/MEMC/VIDC/IOC chip set as implemented on the 400-series board, which unlike the 300 series carries an on-board hard disc controller.
* '''Disassembly and assembly''', and upgrading.
* '''Links, plugs, sockets and test points''', including the battery connector PL11.
* '''Fault-finding''' and functional test procedures, including the battery check (greater than 1.4 V per cell).
* '''Parts lists''' with Acorn part numbers, including the battery holder assembly 0176,009 and the alkaline cells 0817,005.
* '''Serial port application note''' — the Archimedes serial port is RS423 electrically and RS232 functionally.

== What it does not contain ==

It does not cover the later A400/1 series, which uses the Acorn Universal Board and the MEMC1a; that machine has its own manual, the [[Acorn A400-1 and R140 Service Manual]]. It documents Arthur, not RISC OS. It does not document the power supply internally.

<pdf> File:Archimedes 440 Service Manual.pdf </pdf>

Download the Archimedes 440 Service Manual here: [[:File:Archimedes 440 Service Manual.pdf|Archimedes 440 Service Manual.pdf]]

[[Category:Acorn Service Manuals]]
[[Category:Service Manuals]]
[[Category:Acorn Computers]]