faranth: PERQ 1

faranth currently holds the record for oldest and largest computer I own... faranth is a PERQ 1, which is a massive 350x700x650mm in size (although the Technical Overview boasts of the machine's "small size and low cost"...)

The PERQ1 has a 14 inch hard drive and an 8 inch floppy. It's got a portrait monitor, 768x1024 pixels in size, which is pretty impressive for a machine designed in 1979! One of the nicest things about this machine is the architecture; it uses a soft-microcoded CPU, so you can write new microcode to give the CPU a different instruction set.

faranth is the focus of a long-term project to write TCP/IP over GPIB code, which would allow faranth to be networked via tiroth. 10Mb/sec ethernet was standard on later PERQs, and was an option for the PERQ 1, but faranth doesn't have this. It does however have the GPIB parallel instrument control bus, which could theoretically be used for networking. TCP/IP code is available for the PERQ running POS, but assumes 3Mb/sec or 10Mb/sec ethernet hardware. What would need to be done is to convert this code, and also to write appropriate NetBSD code for tiroth.

See also my general PERQ page.

Acquisition

faranth was acquired from somebody in Wales (who was fortunately willing to bring it over to Cambridge...) who said they'd had it for a number of years. It is apparently originally from Oxford University. It was SERC PERQ number 169.

Images of faranth

So far, just views of the hard disk. More to come, hopefully...

View of Hard Disk

view of the hard disk
This image shows the disk side of the Shugart 4006 hard disk. There are two platters and four heads behind the translucent plastic cover. The disk is a 14" model. The mains spindle motor can be seen at the top right. Taking pictures of the hard disk is amazingly difficult due to the reflections off the plastic cover...

Closeup of Heads

view of hard disk heads
This image shows the head on the topmost surface of the disk. The central hub of the disk can be seen to the right.

Hard Disk -- Logic Side

view of disk logic boards
The disk motor is top left, and the black plastic cover over the belt from the motor to the spindle can be seen in the middle of the image. The protective cover over the head motor is on the right.

Caution!

CAUTION! : head motor cover
"-CAUTION- Damper movement with AC power not energized will damage head/disk"
Parking the heads on a PERQ 1 is something of an adventure...
This page written by Peter Maydell (pmaydell@chiark.greenend.org.uk).