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31  General Category / General Discussion / Re: Guruplug Server Plus built-in serial port? on: April 30, 2010, 06:36:39 AM
If you are adding the JTag device to allow an application to use the RS232 port (not for debugging purposes), you could use a USB-2-Serial converter in the standard USB port instead.  It might be cheaper/easier. Smiley
32  General Category / General Discussion / Re: Compiler settings affect floating point performance? on: April 23, 2010, 11:51:24 AM
-Os reduces code size, not data size.  The knee in the chart shows what happens when the data gets bigger than the data cache.  I don't think -Os will help you.  Sorry.

The example in the chart uses a 16KB(yte) data cache.  The Sheeva core in the Plug has a 256KB L2 unified cache to go along with a 16KB L1 data only cache. (there is a dedicated 16KB L1 instruction cache as well)  While not enormous, the second level of cache should help move the knee to the right on that chart.
33  Linux Stuff / General Linux questions / Re: hwclock drift on: April 22, 2010, 12:27:31 PM
As fragfutter said, using ntpd with recent kernels offers the capability of dramatically reducing, but not eliminating, running clock drift.  One caveat: you need to run the plug for about 15 minutes with it hooked to a network with an available ntp server (the internet) for the ntpd algorithms to have enough difference data to do proper drift analysis.

FYI, no matter how good the drift analysis is, the longer the plug is not connected to a ntp server or stratum-0 device (atomic clock, GPS, radio clock, etc), the more drift it will have.  This is true whether the plug is running or not.
34  General Category / General Discussion / Re: Any news on GuruPlug shipping dates? on: April 22, 2010, 07:26:48 AM
The E-Mail I received on April 1 said:
Due to CE & FCC certifications process delay, we are expected to ship your order at the end of April once the certifications are confirmed.
35  General Category / General Discussion / Re: Need the FIQ to run at 20Mhz. How? on: April 22, 2010, 07:22:58 AM
From what I've read in the 88F6281 documents on this page, the interrupt controller can assert two TYPES of interrupts: either IRQ or FIQ.  The mask bits of each type define which type is generated on each interrupt cause.  That is, based on the FIQ low/high mask settings, a FIQ can be caused by any interrupt source, internal or external.

I don't know if this helps and, of course, I could be completely wrong. Smiley
36  General Category / General Discussion / Re: USB Port or USB Stick not working properly on: April 18, 2010, 09:04:20 AM
Have you tried the u-boot in the first post of the following thread?

37  Hardware and U-Boot firmware / Hardware / Re: Bootrom debug mode. What are the commands ? on: April 14, 2010, 08:07:07 AM
I've never seen that before.  Huh
38  Hardware and U-Boot firmware / Hardware / Re: Bootrom debug mode. What are the commands ? on: April 13, 2010, 12:17:18 PM
Do you mean U-Boot?  I believe typing help at the U-Boot prompt will give you a list of supported commands.  Usage documentation for most of them is a google search away. Smiley
39  Hardware and U-Boot firmware / Hardware / Re: GuruPlug I2C on: April 13, 2010, 12:09:40 PM
Schematics would help, eh? Smiley

I don't expect a connector on the outside of the case; but, a connector on the "motherboard" (like the 1.3 plug) or even accessible solder pads would be usable.
40  General Category / General Discussion / Re: guruplug - perhaps bricked on: April 08, 2010, 08:24:57 AM
The GuruPlugs on GlobalScale's site require a separate board/box to connect to the console (tty0) and JTAG interface.  I don't know about yours.

41  General Category / General Discussion / Re: Is GuruPlug shipping yet? on: April 01, 2010, 10:25:58 AM
I just now received this from sales@globalscaletechnologies.com.  I did not contact them.  This was pro-active on their part:

Dear Customer,

Thank you for your order.

This is an updated notice of your GuruPlug Server (Standard version, PLUS version) order status.

Due to CE & FCC certifications process delay, we are expected to ship your order at the end of April once the certifications are confirmed.

Thank you for your understanding and patience.

Best Regard,

Globalscale Technologies, Inc.

Disclaimer: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer. Any views expressed in this message are those of the individual sender unless otherwise stated. Company has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email.
42  General Category / General Discussion / Re: Is GuruPlug shipping yet? on: April 01, 2010, 07:21:07 AM
Must be old stuff in my browser cache or they have a couple of different pages about the same thing. Smiley

From http://www.globalscaletechnologies.com/c-4-guruplugs.aspx

"GuruPlug-Server PLUS can be purchased now and will begin shipping in late April 2010."

I don't know which one is correct (early, mid, late April); but, I don't expect to see mine for a while yet.
43  Hardware and U-Boot firmware / U-Boot stuff / Re: U-Boot Bitmap Splash on: March 31, 2010, 12:49:48 PM
Not to sound too dense Smiley; but, what frame buffer?  There is no hardware (graphics/video chipset and memory) included in the plug that could have a bitmap copied into it.
44  General Category / General Discussion / Re: Is GuruPlug shipping yet? on: March 31, 2010, 07:47:28 AM
The GlobalScale site says end of April, not March.
45  Hardware and U-Boot firmware / Hardware / Re: Underclocking the Sheevaplug on: March 30, 2010, 02:21:25 PM
The processor in a plug is a Marvell Kirkwood 88F6281.

Here is a link to the Marvell Kirkwood page.  According to the table, this processor can go down to 1 Ghz.  I *think* I remember reading somewhere that the clock speed used affects the speed of the memory that can be attached to the device as well so dropping the clock speed may not be the only thing you'd need to tweek.

Sorry, I don't have a better memory. Smiley
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