Posted by jpluimers on 2022/09/01
Geocities is long dead, but luckily a lot has been archived: [Wayback] Archive.is: History of ASCII Art with a very comprehensive history ranging from ancient old hand painted art to contemporary computer made illustrations.
Via: [Wayback/Archive.is] ASCII art: The roots of ASCII art
–jeroen
Posted in ASCII, Development, Encoding, History, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2022/07/06
Early june, I blogged about Wake-on-LAN from a Windows machine.
My plan was to adopt [Wayback/Archive.is] Wake.ps1 into Wake-on-LAN.ps1 (as naming is important).
One of the goals was to support multiple hardware MAC address formats, especially as Wake.ps1 had the below comment, but did support the AA-BB-CC-DD-EE-FF, though not the AA:BB:CC:DD:EE:FF hardware MAC address format:
<# ... .NOTES Make sure the MAC addresses supplied don't contain "-" or ".". #>
A colon separated hardware MAC address would result in this error inside the call to the [Wayback/Archive.is] PhysicalAddress.Parse Method (System.Net.NetworkInformation) | Microsoft Docs:
Send-Packet : Exception calling "Parse" with "1" argument(s): "An invalid physical address was specified."
So I did some digging, starting inside the above mentioned blog post, and adding more:
Parse method in the [Wayback/Archive.is] PhysicalAddress.cs source code in C# .NET, which contains code like this://has dashes? if (address.IndexOf('-') >= 0 ){ hasDashes = true; buffer = new byte[(address.Length+1)/3]; }
xx:xx:xx:xx:xx:xx(canonical)xx-xx-xx-xx-xx-xx(Windows)xxxxxx-xxxxxx(Hewlett-Packard switches)xxxxxxxxxxxx(Intel Landesk)
I should rename the first one IEEE 802, as per this:
The standard (IEEE 802) format for printing EUI-48 addresses in human-friendly form is six groups of two hexadecimal digits, separated by hyphens (
-) in transmission order (e.g.01-23-45-67-89-AB). This form is also commonly used for EUI-64 (e.g.01-23-45-67-89-AB-CD-EF).[2] Other conventions include six groups of two hexadecimal digits separated by colons (:) (e.g.01:23:45:67:89:AB), and three groups of four hexadecimal digits separated by dots (.) (e.g.0123.4567.89AB); again in transmission order.[30]
The latter is used by Cisco (see for instance [Wayback/Archive.is] Cisco DCNM Security Configuration Guide, Release 4.0 – Configuring MAC ACLs [Support] – Cisco and [Wayback/Archive.is] Cisco IOS LAN Switching Command Reference – mac address-group through revision [Support] – Cisco), so another format to add:
xxxx.xxxx.xxxx(Cisco)
The
addressparameter must contain a string that can only consist of numbers and letters as hexadecimal digits. Some examples of string formats that are acceptable are as follows:
00112233445500-11-22-33-44-550011.2233.445500:11:22:33:44:55F0-E1-D2-C3-B4-A5f0-e1-d2-c3-b4-a5Use the GetAddressBytes method to retrieve the address from an existing PhysicalAddress instance.
I really do not have all the sources for the various representations for 48-bit MAC addresses, but I have seen them variously used:
AA-BB-CC-DD-EE-FF AA.BB.CC.DD.EE.FF AA:BB:CC:DD:EE:FF AAA-BBB-CCC-DDD AAA.BBB.CCC.DDD AAA:BBB:CCC:DDD AAAA-BBBB-CCCC AAAA.BBBB.CCCC AAAA:BBBB:CCCC AAAAAA-BBBBBB AAAAAA.BBBBBB AAAAAA:BBBBBB
From the last list, which is far more complete than the others, I recognise quite a few from tools I used in the past, but too forgot the actual sources, so I took the full list from there and tried to name them in parenthesis after the links I found above and what I remembered:
AABBCCDDEEFF (Bare / Landesk)AA-BB-CC-DD-EE-FF (IEEE 802 / Windows)AA.BB.CC.DD.EE.FF (???)AA:BB:CC:DD:EE:FF (Linux / BSD / MacOS)AAA-BBB-CCC-DDD (???)AAA.BBB.CCC.DDD (Cisco?)AAA:BBB:CCC:DDD (???)AAAA-BBBB-CCCC (???)AAAA.BBBB.CCCC (Cisco / Brocade)AAAA:BBBB:CCCC (???)AAAAAA-BBBBBB (Hewlett-Packard networking)AAAAAA.BBBBBB (???)AAAAAA:BBBBBB (???)Some additional links in addition to the ones above:
–jeroen
Posted in .NET, CommandLine, Development, Encoding, HEX encoding, Network-and-equipment, Power User, PowerShell, PowerShell, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2022/06/30
Even with a batch file saved as UTF-8 (with or without BOM), by default it does not show most non-ASCII Unicode characters.
The reason is that the default codepage usually is an ANSI one like codepage 437.
Thanks [Wayback] niutech for answering [Wayback/Archive.is] Unicode symbols in a batch file – Stack Overflow:
You can manually set the codepage to UTF-8 by typing
chcp 65001at the top of your batch file.
Codepage 65001 is Windows speak for the UTF-8 code page. I have some more blog entries mentioning codepage 65001.
An example where I needed this was to show how to address the localghost from a batch file (see The spookback localghost address to resolve 👻). This was the resulting UTF-8 saved batch file:
chcp 65001 ping 👻 ping xn--9q8h
For single-byte non-ASCII characters, you can usually get away with setting the encoding of your batch file to your default code page as mentioned in [Wayback/Archive.is] cmd – Using box-drawing Unicode characters in batch files – Stack Overflow.
–jeroen
Posted in Batch-Files, Development, Encoding, Scripting, Software Development, Unicode, UTF-8, Windows Development | Leave a Comment »
Posted by jpluimers on 2022/06/09
Like me, [Archive.is] Kristian Köhntopp is a nerd.
Unlike me, Kris bumped into character encoding issues for just about all his digital life. That started about the same time as mine, but again unlike me: he was way more involved in the technical aspects of it.
First a series of Tweets:
Posted in ASCII, C++, Development, Encoding, EPS/PostScript, Font, ISO-8859, ISO8859, Power User, Software Development, Times New Roman | Leave a Comment »
Posted by jpluimers on 2022/06/01
Get the new [Wayback/Archive] Delphi Thread Safety Patterns eBook at a discount while it is hot:
Use Coupon Code: DTSPATT10 at checkout to get a $10 discount.
This promotional offer is valid through June 14.
Posted in Delphi, Development, Encoding, ISO-8859, ISO8859, Mojibake, Multi-Threading / Concurrency, Software Development, UTF-8, Windows-1252 | Leave a Comment »
The Wiert Corner - irregular stream of stuff 