LinuxQuestions.org - Bits and Pixels

Concerning free software, programming, and whatever else I find interesting. Also the blog for my Web site, frigidcode.com.

Interesting facts about ASCII

Posted 02-03-2012 at 04:59 AM by hydraMax (Bits and Pixels)

Some interesting about ASCII, when it is represented as bytes in a binary system: (taken from Art of Assembly Language):

1) All alphabetic characters in standard ASCII can be converted to lowercase or uppercase simply by toggling the fifth bit (the first bit is bit zero). E.g.:

Code:

E = 01000101
e = 01100101

2) you can obtain the numeric equivalent of any of the numeric characters by subtracting 0x30 from the ASCII value.

3) Bits five...

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Really tiny executable

Posted 02-01-2012 at 03:23 PM by hydraMax (Bits and Pixels)

Thought this was neat:

A Whirlwind Tutorial on Creating Really Teensy ELF Executables for Linux

The author uses assembly and ELF-hacking to make a binary as small as possible while still doing something useful (returning a value). Goes step-by-step through each hack.

hydraMax

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Holy Binary Blobs, Batman!

Posted 01-25-2012 at 02:58 PM by hydraMax (Bits and Pixels)

Just how many binary blobs are there in the kernel...!? I finally enabled "deblob" for my gentoo kernel sources, and it took the build five minutes to remove all the kernel blobs! Must have been hundreds of them. I think I saw my Ethernet driver scroll by... hopefully I have networking in my next boot. (*gulp*)

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New Printer: Brother HL-2270DW

Posted 01-25-2012 at 03:39 AM by hydraMax (Bits and Pixels)

Finally broke down and bought my first printer, a Brother HL-2270DW. It has only been a few days, but I'm pretty happy with my purchase. It's everything I wanted: an inexpensive, Ethernet capable, Linux-compatible laser printer (I hate inkjet). It provides LPD/LPR service over the network, so you don't even have to download the proprietary drivers to use it: just use the CUPS Web interface to add an LPD printer (Generic PCL) and point it to the correct IP address.

If it is plugged...

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Archive Diff

Posted 01-23-2012 at 10:12 PM by hydraMax (Bits and Pixels)
Updated 01-23-2012 at 11:14 PM by hydraMax

I have beta source code available for another small utility I coded, called Archive Diff. It is a convenient tool intended to let you quickly see the differences between the files in two archives, without going to the trouble of unwrapping the archives yourself or running the proper diff commands. The target users are those who like to install software from source code but also like to know exactly what source code has been changed between the two versions (i.e., without trusting the ChangeLog or...

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