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A3000

A3000 This is the A3000, a later, cut down version of the earlier A300/400 ranges. Housed in an Amiga style case, this Archimedes lacked a serial port (it just had a hole and a warning label) and wasn't very expandable, but was a good entry-level machine for many in the pre-RiscPC era.

The later A3010, effectively the replacement for this machine, is easily distinguishable because it had green function keys instead of red; it also had a serial port and a high density disk drive, and included a TV out and a 9-pin digital joystick port.

A3000
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A3000 insides (loaded) Taking the lid off, notice the cardboard housing for the power supply on the far left; this meant that all upgrades were supposed to be done by qualified Acorn dealerships due to a risk of electrocution. This was later replaced with a proper metal housing (perhaps in lieu of a strong dealership network).

This particular machine also has a network card in place (middle-top). As the internal upgrade slot is now full, this machine has to have any other upgrades - such as a hard drive interface - on the outside, using the single external upgrade slot (top right, above the floppy drive unit).

A3000 insides (loaded)
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A3000 insides (stripped) With the keyboard and network interface removed, we can see the insides of this machine a little better. At the bottom (middle) we can see the processor (the block with a gold square on it). This is an upgrade to a 36Mhz ARM3 from the original 8MHz ARM2; alas as this kind of upgrade was not foreseen the lid and keyboard doesn't fit properly any more! The A3000 came originally with RISC OS 2 and 1MB of memory; this machine has been upgraded to RISC OS 3.1 (the four chips bottom-left-ish) and 4MB of memory (between the processor and the floppy drive - it flaps slightly, causing the machine to hang and refuse to restart until it's fixed).
A3000 insides (stripped)
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A3000 - closeup on processor (36Mhz ARM3 upgrade) As you can see, this upgrade was achieved using a daughterboard which has the unfortunate side effect of raising the chip somewhat (hence the ill-fitting case). Note also the rather dodgy-looking red probe and wiring. At the top of this picture is the memory upgrade, which appears to have flopped forwards slightly - again. Sigh. The four chips that make up RISC OS 3.1 are at the left of this picture.
A3000 - closeup on processor
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