This is the Acorn Archimedes, i have 3 of them currently and this is what the inside of two of them is like
This is the older of the two, it has built in floppy and MFM drive controller (with support for 2 drives), On the right is the memory, the rightmost row is optional. the chips are labeled as follows (Right to left top to bottom) ARM CPU, Memory Controller, IO Controller and Video Controller.
This is where expansion cards are plugged into, it rises from 1 into 4.
When the machine is assembled this is what it looks like with the PSU on the right System Bus Expansion in the middle. above the psu is a Fan with a filter and next to that the system battery.
The back of the machine has hi res Mono Video and syncing Analog RGB, Serial, headphones, Printer and econet.
This is much like the other motherboard except the battery is onboard and the CPU is now on a seprate card, Also the power connector has been combined into 1 and there is no hard disk controller built in.
This is the Arm 3 CPU the Clock generator says 50Mhz.
On this card is some more memory with a memory controlling chip.
This is the riser card like as in the other machine.
This machine looks much the same as the other except the PSU is much bigger and so there is no room for an extra fan Although this psu has Fan's built into it unlike the other one.
The back of this machine has Hires video, Verticle Sync and Horizontal Sync RGB Video, Headphones, serial,Printer and econet.
This is the standard econet adapter that seems to be used in most acorns.
This is an IDE hard disk controller used in one of the acorns. With a position to mount a small harddisk as well as a large hard disk connector.
This is a simular card also an IDE controller. This has a connection for a small and large hard disk and mountings for both.