🇺🇦 haxadecimal

#microcontroller #firmware #FPGA #SDR (SW Defined Radio)
#retrocomputing
#nonpareil HP calculator simulation at microcode level
Maker (with John Doran) of Nixie tube RPN calculators
CHM PDP-1 Restoration Team
Damned dirty ape
Call sign N2ES
he/him
cis male
Not a tame programmer
in #Colorado, not far from #Denver

Public Key

npub1sk8ua7ffvg85ugdhj7ddr06j58xzxpdkzsflk5zqszjdw7fet24slrh5th

NIP-05 Address

brouhaha_at_mastodon.social@momostr.pink

Profile Code

nprofile1qqsgtr7wly5kyr6wyxme0xk3haf2rnprqkmpgylm2pqgpfxh0yu442c06qnek

Author Public Key

npub1sk8ua7ffvg85ugdhj7ddr06j58xzxpdkzsflk5zqszjdw7fet24slrh5th

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Last Notes

2024-08-26 09:56:26

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Which one is the "original DOS"?
IBM DOS/360?

2024-08-16 23:30:06

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Gotta pound all the little square pegs into the round hole, y'know.

2024-07-10 05:43:21

My new file server machine, which is a dual Xeon E5-2620 from 2014 with 384GB of RAM in a 24 bay hot-swap 3.5" SAS/SATA chassis, is finally in the rack. Weighs somewhere around 75lb without drives, which made carting it downstairs and mounting it in the rack fairly challenging. It's times like these that I wish I had a hydraulic lift, but I would need it too rarely to justify buying one.

2024-07-10 04:44:43

I just bought a copy of the ISO 6160-1979 standard for the PL/1 (sic) programming language. I'm going to deliberately violate the copyright by posting the entirety of the meaningful content of the standard here:
The following national standards are adopted as ISO International Standard 6160-1979:
- for the English text, ANSI stnadard X3.53-1976;
- for the French text, French standard NF Z 65-500.
So, that's CHF 18.00 wasted.

2024-07-08 03:59:14

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Definitely much more easily achievable.

2024-07-08 03:57:30

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It might be fun to actually make an early Unix run on it, or a reimplementation like xv6:
https://github.com/mit-pdos/xv6-public
I'm not trying to suggest that you spend any of your time on it, nor an I volunteering to do so myself.

2024-07-05 00:00:04

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Rectennas are so efficient that it is possible to beam microwave power to a rectenna farm of multiple square kilometers, such that even at high overall power delivery, the power per square cm is low enough to no be significantly harmful to wildlife or humans.
If that were not the case, this power transfer means would be too dangerous to even consider.

2024-07-02 00:41:58

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Thanks!

2024-07-02 00:32:17

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Is the BOM online so I can order the necessary components?

2024-07-01 21:03:31

Using FreeCAD to design enclosures for KiCAD PC boards:
https://hackaday.com/2024/07/01/freecad-foray-shells-for-all-our-pcbs/

2024-06-29 20:35:00

Nearly every web site:
Would you like us to send you notifications? [Yes] [Maybe later]
How about NEVER, you a**holes? Would that be "later" enough for you?
Browser extension idea:
Whenever a web site asks a question with "yes" and "maybe later" answers, automatically do the "maybe later" action without even showing the dumba** question.

2024-06-23 01:28:25

Don't touch that disk drive, it's SCSI!

2024-06-17 21:44:13

C++ type deduction is great. Maybe in C++26 we can also have type induction.

2024-06-11 21:44:07

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The big print giveth, and the small print taketh away.

2024-06-09 03:52:16

Hell is other people's code.

2024-06-06 21:54:34

no gods too many masters

2024-06-02 22:40:52

Wanted for 16700 logic analyze hacking: HP PA-RISC workstations:
C132L, C160L, or C180L
C3000, C3600, C3650, C3700, or C3750
C8000

2024-05-28 01:57:37

For everyone who tells me "expect the unexpected", well, thanks for the advice, but C++23 says that I.can't.

2024-05-19 23:13:44

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Sounds good.
I'm a bit confused about the indicated direction of PGOOD, and the use case for DETECT.

2024-05-19 23:08:54

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If it's for multiple future use, and maybe by other people as well, it makes sense to plan it well. I think your latest iteration on the pinout looks good
In general, how much power (max steady state) do you forsee using with this?

2024-05-19 23:05:12

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Sounds good. Main thing in that case is just to have as many GND (current return) pins as possible, and you can arrange them to best suit layout.
I'm a big fan of DIN 41612, now ISO 60603-2. Good stuff!

2024-05-19 23:00:34

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I agree re moving RxD & CTS down, though if those are logic level, it's not super important, as there shouldn't be very much current there, and another GND is reasonably close. If actual TIA-232, slightly more concern, but still not a huge deal.
Also matters more if there's a cable, vs direct board to board.

2024-05-16 04:26:45

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That seems to be the problem. The directory exists but is empty. I'll set about fixing that.

2024-05-16 04:24:55

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I didn't have any KiCad installed before installing 8.0.2. My paths look like:
https://files.mastodon.social/media_attachments/files/112/448/863/318/041/296/original/662d50356c082a8b.png

2024-05-16 04:10:38

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Under path substitutions, I see ${KIPPJMOD} as /home/eric/src/glasgow/hardware/boards/glasgow which is the path to the project. Should there be someting more specific?

2024-05-16 04:01:53

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I'm using KiCad 8.0.2 on Fedora x86_64.

2024-05-16 04:00:26

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I specifically cloned that repository a few hours ago, opened the board .pro file in KiCad, asked for a 3D render, and didn't get any components other than the reset button and sync header.

2024-05-16 02:41:24

Anyone have an open-source #KiCad PCB design that 3D renders with components and looks at least moderately interesting? Doesn't need to be anything specific. I just need a 3D model of a PCB for a demo of a simple program.
I've tried using some projects linked from the KiCad web site, but even for the ones where a rendering is shown on the web site, the only renderings I can get have no components, just the bare PCB. I must not have the necessary libraries.
Thanks!!!

2024-05-13 20:18:03

Techbros won't admit that what they're foisting of on us isn't Artificial Intelligence, but rather, Artificial Stupidity. As if we didn't already have more than enough of the natural kind.

2024-05-11 23:36:09

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With regard to the actual Wikipedia article content, I don't believe that CBM's HMOS process had anything to do with Intel, other than that Intel was first to name scaled down NMOS "HMOS". Other companies including Motorola also used the name "HMOS" for their own scaled NMOS, and later, also used HCMOS for scaled CMOS.

2024-05-10 19:06:54

The C preprocessor needs an #exclude directive.

2024-05-08 21:34:23

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Since you finally got them to understand, can you ask them how to specify it in the future?

2024-05-08 21:28:06

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Even when they do know, you have to emphasize "hard gold" and plating thickness, or you'll get crap.
I've not personally encountered a Chinese PCB fab that didn't know what gold edge fingers were, but I've mostly used fabs that routinely deal with western customers.
Did you try sending them your photo?

2024-05-08 21:20:42

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PCIe spec says 0.7um (micron) gold over 1.2um nickel. This is IIRC enough to last for 50 mating cycles.
Be very careful about units, as PCB plating used to be commonly specified in uin (microinches), and sometimes still is. 1 microinch is only about 0.03 microns, so if you and the PCB company aren't using the same units, you can get screwed.
If you have to use microinches, the equivalent to the PCIe spec is (obviously) approximately 25 microinches gold over 40 microinches nickel.
2/

2024-05-08 21:13:00

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"hard gold edge fingers", which is gold over a layer of nickel, required to prevent the gold aroms from dispersing through the copper.
If you just say "gold edge fingers", you'll get "gold flash", an ultra-thin layer of gold without nickel, which will wear off after only a few mating cycles. Due to the previously mentioned dispersal, it can still _look_ gold after that, while not actually providing the corrosion resistance of hard gold.
1/

2024-05-07 01:16:02

Introducing a revolutionary new software development methodology: WORN
Write Once Run Nowhere
Benefits:
* Simple to learn
* Compatible with either Waterfall or Agile development models
* Ultra-fast compilation
* No debugging necessary (or possible)
* Low cost
* Training courses available

2024-04-29 04:41:56

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Sure you can! When you tell someone to go to hell, it doesn't matter whether you believe hell exists. It only.matters whether _they_ believe it.

2024-04-23 20:46:44

I lugged the 16700A logic analyzer out of the basement and to the car. Gravity seems to be much higher than when I put it into the basement. I think it might do me in. If I don't make it, tell my family I love them, and my epitaph should say "killed by logic analyzer".

2024-04-22 06:14:04

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I don't know anything of ARC in Swift. The Rust ownership model predates Swift.

2024-04-22 06:06:42

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Rust is the only one on your list that actually is something new (lifetime control enforced by borrow checker). The others are just also-rans in the Pascal and C families, with influence from Smalltalk done badly.

2024-04-22 05:43:08

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I don't trust any programmers, including myself

2024-04-22 00:42:53

Computers are terrible. I recommend against.

2024-04-20 22:58:58

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I'll take the Kaypro.

2024-04-18 20:08:20

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In the 1990s, when vendors used "Open" as part of a product name, it was not an adjective, but rather, a transitive verb, and the object of the verb was your wallet.

2024-04-16 01:44:33

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risible basic

2024-04-13 04:03:00

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I must not understand the ternary operator as well as I thought.

2024-04-12 02:35:12

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[@emily](https://sparkly.uni.horse/@emily)
Darmok and Jalad mowing Tangara

2024-04-11 06:17:57

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I tend not to worry about the 100mm limit so much for two-layer boards, but it's still an issue for me with four-layer.