Microprogrammable light CPUs come with Linux

Tensilica are shipping the Extensa 7 at 250MHz & 0.082mW (yes, that’s MILLIwatts, overclockers) per clock cycle.

To polish the Penguinista perspective, they are available with MontaVista Linux. They’re billed as “post-RISC” style processors, so they can do sneaky/fast VLIW instructions, & “even extend the architecture with C/C++ application-specific instructions” for those of us who absolutely have to eke out the last skerrik of performance from every device which falls into our hands.

According to Tensilica, the Extensa 7 churns through twice as much code as an ARM7TDMI-S while drawing roughly half of the power.

The LX2 variant of Extensa also does faster I/O, is better optimised for VLIW-style instructions, & stars a high-speed 7-stage instruction pipeline. All chips include various error-correcting & power-saving sneakiness.

Comments

new life for an old (FTX) PSU, improved life for one human

the LEDs on this 5m strip happen to emit light centred on a red that does unexpectedly helpful things to (and surprisingly deeply within) a human routinely exposed to it. it has been soldered to a Molex connector, plugged into a TFX power supply from a (retired: the MoBo is cactus) Small Form Factor PC, the assorted PSU connectors (and loose end from the strip) have been taped over. the LED strip cost $10.24 including postage, the rest cost $0, the PSU is running at 12½% of capacity, consumes less power than a laptop plug-pack despite running a fan. trial runs begin today.

every-application-is-part-of-a-toolkit at work

I have a LibreOffice Impress slideshow that I wish to turn into a narrated video. 1. export the slideshow as PNG images (if that is partially broken — as at now — at higher resolutions, Export Directly as PDF then use ‘pdftoppm’ (from the poppler-utils package) to do the same). 2. write a small C program (63 lines including comments) to display those images one at a time, writing a config file entry for Imagination (default transition: ‘cross fade’) based on when the image-viewer application (‘display,’ from the GraphicsMagick suite) is closed on each one; run that, read each image aloud, then close each image in turn. 3. run ‘Imagination’ over the config file to produce a silent MP4 video with the correct timings. 4. run ‘Audacity’ to record speech while using ‘SMPlayer’ to display the silent video, then export that recording as a WAV file. 4a. optionally, use ‘TiMIDIty’ to convert a non-copyright-encumbered MIDI tune to WAV, then import that and blend it with the speech (as a quiet b...

boundaries

pushing the actual boundaries of the physical (not extremes, the boundaries themselves) can often remove barriers not otherwise perceived. one can then often resolve an issue itself, rather than merely stonewalling at the physical consequences of the issue.

Plantagenet Penguinista

Search This Blog