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CompuLab Fit-PC3
Setting Up Iris

Jim Carter, 2014-02-18


In the Box

Check the box contents and record serial numbers. Try to get the ethernet MAC address so it can be registered with the firewall.

What's in the box:

Beware: This machine has no disc and no operating system. You will need to obtain your operating system from another source. This of course is simple, inexpensive and legal for Linux.

Assembly steps:

BIOS Setup

Installing OpenSuSE 13.1

For MythTV, create a directory /s1/video and a link to it from /video. [Done]

On the fit-PC3 LP I ran memtest86+ for 2 passes taking 3.5 hours. No errors. Memtest reports these parameters for the machine:

I also ran it on the fit-PC3 Pro for 2 passes taking 2.5 hours. No errors.

Brain Transplant

Presently the machine Jacinth (fit-PC3 Pro) is on all the time and uses 17W at idle, not counting peripherals. The disc, and the software installed and configured on it, defines the role. I plan to disconnect the disc and peripherals from the fit-PC3 Pro and connect them to the fit-PC3 LP, using 13W, which is what I originally intended. Then the fit-PC3 Pro will continue in the Iris role of video playback. Here is the procedure for that exchange.

USB Bus Structure on fit-PC3 LP

This looks identical to the fit-PC3 Pro buses. Each physical bus has a OHCI (12Mbit/sec) controller, a EHCI (480Mbit/sec) controller, and one of them has a XHCI (5Gbit/sec) controller. Each controller is reported by lsusb as a separate bus, though I'm sure that they are logically fused. Below, each controller group is shown as one bus.

On the Zbox something was very picky about which ports the various components were plugged into. The issue is that TV capture cards take significant bandwidth (USB-2.0 required) and the bandwidth allocator has trouble to recognize when other devices can successfully share the bus. I'm going to use these bus assignments on Iris, the fit-PC3 Pro:

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