Wikipedia:Reference desk/Archives/Computing/2018 July 26

= July 26 =

Native support for the CMYK in open source
It appears to me that native CMYK support is not very common in open source software. I expected GIMP, which is an otherwise very satisfying program, to have it. If this is the case, what is the reason for this? Is it difficult to implement? Is there some sort of copyright or software patent blocking developers? Users simply won't use the software for printing, so, no pressing need for it?--Doroletho (talk) 15:12, 26 July 2018 (UTC)
 * CMYK is mainly necessary in commercial printing which is not an intended purpose of open source software. Ruslik_ Zero 08:17, 28 July 2018 (UTC)

SafeRTOS in ROM?
Our article on FreeRTOS says "SafeRTOS is included in the ROM of some Stellaris Microcontrollers from Texas Instruments", a claim that is also found here:

Looking at section 1.3.2 of the TI Stellaris LM3S9B96 Microcontroller datsheet this chip has SafeRTOS in ROM,

But according to Digikey and Mouser it is an obsolete item, no longer available.

So is there a currently available chip with SafeRTOS in ROM, or should I edit the page to say "SafeRTOS was included in the ROM of some now-obsolete Stellaris Microcontrollers from Texas Instruments"? --Guy Macon (talk) 15:25, 26 July 2018 (UTC)
 * The challenge with this topic is that many electronic parts aren't available for purchase by just anybody, so if you want current information about available part configurations, you'd need to speak to an account or sales representative. Wholesale distributors like Mouser are not the only way to buy parts - they're just the easiest open marketplace, especially if you're only purchasing less than a few thousand units.  For large volume orders, the manufacturer can provide all kinds of options that are not advertised in the clear.  Nimur (talk) 16:33, 26 July 2018 (UTC)

OpenVPN: What IP address should I see when connected?
I have installed OpenVPN on my Linux server, and can connect to it from my laptop, which is running Windows 10. I have verified the connection in the OpenVPN logs, and I can ping the IP address it assigned, which I'll call IP1. However, when I connect from my local coffee shop, whatsmyip.com shows a different IP address (IP2). I thought it would show IP1. Am I not thinking correctly about this, or is it maybe because I have to login to the coffee shop's web page in order to use their wifi? OldTimeNESter (talk) 17:23, 26 July 2018 (UTC)
 * You'd have to configure your client to redirect traffic through the VPN. By default, OpenVPN basically only patches an external client into the server's LAN (a virtual one if using routing mode, and its actual LAN if using bridge mode ), but you can subsequently use the OpenVPN server as the gateway for all you client's external traffic. Fortunately, OpenVPN can handle all that automatically: adding  to your client's OpenVPN configuration file should do the trick. -- Link  (t&bull;c&bull;m) 22:35, 26 July 2018 (UTC)