I had nothing to do with this but I’m super excited.

There has been a long-standing bug in the CPU emulation in Basilisk II (a 68K Macintosh emulator) that could be reliably triggered when *inhales* Bruno the shark killed you in a later level of Barrack, an Ambrosia Software enhanced Jezzball type game that I’m quite fond of. Barrack has bugs in almost all emulators including Apples’ own Classic environment, so it’s a good test for emulators (…and it’s a great game, IMO the best of the genre).

I saw the basiliskii-git AUR package update when I was running updates earlier, played one round of Barrack during my afternoon coffee break to see if anything major changed, and … it’s fixed!

It looks like it might be this little one-liner to the control register handling related to differences in MOVEC between the 68000 and later 680×0 versions, in some core code inherited from UAE.

Posted on 2023-10-10 by pappp | Leave a comment

Hacked Chromebook Thoughts

Posted on 2023-08-31 by pappp

Several years ago I picked up a used Dell Chromebook 11 3189 (model code “Kefka”) to play with. At the time it was still receiving ChromeOS updates, had a sticky hinge that required some lubrication and manipulation to get working, and cost around $100 including the separately purchased power adapter. I’ve hacked on it in a wide variety of ways over the years, and the main interesting result is that I’m starting to think a hacked out-of-support x86 Chromebook is, in many ways, now better and cheaper than a Raspberry Pi in that role as a modern accessible extra computer to enable fearless play the Pi was intended to fill. I’ve been taking notes, so way too much detail below.

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A Classic 3D Printing Task: Thread Adapter

Posted on 2023-08-14 by pappp

Every now and then I like to post one of these, just to show process I currently use. The magic of 3D printing is that once you’re set up this kind of quick job comes up all the time.

I have this cheap thread assortment that came on tubes rather than spools. It’s surprisingly decent thread, has good coverage for finding suitable colors for any project… and the 13mm ID tubes wobble badly on standard 4.5x40mm spool pins on sewing machines, especially when filling bobbins.

I was doing a little (ham fisted) machine sewing this weekend and it was irritating me …so I fixed it.

Showing that 13mm ID tubes do not rest nicely on 4.5mm spool pins.
The tube wobbles badly on spool pins, especially when winding a bobbin.
Box with assorted colors of thread on spools, digital calipers measuring the spool.
A couple quick measurements.
Screenshot of process, showing the model in FreeCAD, PrusaSlicer, and the progress in OctoPrint
A pass through the CAD/CAM process
Showing the Anycubic Kossel setup printing the part.
Printing the part. Silver “Silk” PLA because it was loaded from the previous task.
Showing the part installed between the tube and spool pin.
Fits well enough on the first try.


I’m finally getting less-incompetent with FreeCAD. Straight to “Part Design” workbench, sketch only one extruded pads’ features at a time, then decorate in any chamfers etc. at the interfaces. Import into PrusaSlicer with some sane defaults, send to the Anycubic Linear Kossel in the basement via OctoPrint (No, I don’t do it blind, I send and load the file, then go down to keep an eye on the startup sequence and make sure the filament hasn’t cracked and such), receive part.

Fit is intentionally a bit loose on all dimensions, nothing this part interacts with is consistent or close-tolerance, everything should move if it wants to, and the chamfer gets the tube seated well enough to not flop about.

FCStd and 3mf if anyone else happens to have this exact problem, which seems likely because similar thread assortments seem to be pretty ubiquitous on the usual eCommerce sites.

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In which I nerd out about Coffee Paraphernalia

Posted on 2023-07-04 by pappp

Back in early 2010 I posted about my home espresso setup at the time. I recently (finally) replaced it, and I have thoughts. Obnoxious, obsessive, thoughts.

The TL;DR is that I bought a Breville Bambino espresso machine and a Turin SK40 grinder, the former is good, the latter is really good, but there is plenty of rambling and pictures and such below the fold.

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Tunic

Posted on 2023-07-03 by pappp

I’ve been playing some Tunic the last few days, because the Steam Summer Sale managed to poke me at just the right moment to get an impulse buy. I was interested enough that I paid $20 for a game that came out like a year ago instead of my usual “Wait until I can pick it up for a few dollars and run it on a contemporary potato” gaming strategy.

It’s very to my taste, and I’m enjoying it, but it is, in classic self-indulgent indie game fashion, “Video game tropes: the game.” Not that there’s anything wrong with making things for your own in-group, but it winks so hard you start to wonder about a palsy.

The visual style and gameplay nod to everything. Fez. The whole Zelda franchise. Soulsbornes. Some Monument Valley style geometry illusion/architectural environmental storytelling. Bunches of stereotypical Supergiant details. It’s never met a game trope it didn’t like. They executed and integrated pretty well though, and I am in the market segment that connects to the references. [Ed: Oh look. Some Half Life 2 Citadel and more explicit Chrono Trigger refs late(?) game!]

It’s not …quite… as self-indulgent as Lenna’s Inception (same kind of 2D Zeldalike vein, did it a few summers ago, had slightly more fun than irritation about how hard it was sniffing its own farts), and it’s far more modern and sophisticated than the various Solarus engine games. The visual style is both cuter and more spectacular than either.

It also has the classic indie game feature of being relatively graphically simple, built on a major engine, and still being kind of a resource hog … though I’m playing on Linux via Proton/DXVK, on a workstation-model Polaris12 GPU, so some of the “Barely holding 24fps at 720p on a system that can do way more visually impressive games” is probably my fault [Ed: performance issue suddenly fixed after update and reboot, must have been a driver/system state thing]. I will say, having not played many commercial game for the last few years, the progress with transparent, performant functionality out of the Proton ecosystem is really impressive.

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Anbernic RG351(p) and Powkiddy RGB10 Max2 Button Membranes are Drop-In Compatible

Posted on 2023-06-04 by pappp
Original RG351 and PowKiddy RGB10 Membranes, installed in a RG351p
Angled comparison, to show height.
Top down comparision.

I’ve had an Anbernic RG351P for roughly 2 years now, and it’s an absolutely delightful object.

For those unfamiliar: the RG351 is an example of a class of little gaming emulation handhelds that started back in the mid-to-late 2000s with things like the Dingoo A330. They are, essentially, a tiny ARM (+ usually Linux) machine the size and shape of a handheld gaming device, set up with a built-in controller specifically to run games in emulation. The stock firmware on the RG351 is an ancient EmulationStation/RetroArch/Linux stack, but there are better alternatives – IMO, throwing in a decent SD card loaded with AmberElec is the first thing to do when you get one. It will play essentially everything from the dawn of gaming through the PlayStation and some (but not all) of the Nintendo 64 library, and has limited/marginal support for PSP and DS. It is …straightforward but not the sort of thing I’ll link… to obtain the full ROMsets for these platforms, they are frankly not that large. I paid about $90 for mine, I think they’ve gone up a bit, but there are a whole range of similar options at different price points, build qualities, and platform support.

The build quality, however, isn’t perfect. It’s small-brand China-export hardware. You know you have to be a little careful with it just from handling (I keep mine in a fitted case when throwing it in a bag). I’ve been through a screen (I got red lines in my original after about a year), re-gluing the back rubber pads (original glue melted), and now after two years I wore through the membrane behind the “A” button, and that’s actually what this post is about.

I opened it up, found the worn though button, looked around online, couldn’t any in stock, contacted Anbernic through their AliExpress store front (none available), asked the subreddit (no leads), and couldn’t come up with any exact replacement membranes.

HOWEVER on inspection, the membranes from the similar Powkiddy RBG10 appeared extremely similar, and those are readily available (as a $12ish pack of all the membranes and button caps to refit an RGB10, which includes two of the 4x membranes). I ordered this set via Aliexpress, and ~16 days later when it showed up, can confirm the membranes are slightly different, but drop-in compatible.

As you can see from the photos, the Powkiddy membranes have a bit more flat area, and the bottoms of the mounting holes are filled in rather than fully punched through, but the dimensions are exactly right. The height and force of the domes is even almost identical to the originals, and at effectively $6/membrane it’s a very reasonable repair.

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Dumb Linux trick:

Suspicious of damaged system files on an RHEL-like (rocky, alma, centos, probably fedora, whatever) system?

Once you get it unfucked enough to use the package manager (dealing with filesystem problems, hand-re-installing the rpms required to make dnf work, etc.) , systematically reinstall all installed packages!

As root do a:
rpm -qa --queryformat "%{NAME}\n" > installed.txt
dnf reinstall $(<installed.txt)

and settle in for a long operation.

I’ve done it on Arch boxes where it is written as something like pacman -Qqn | pacman -S -, but hadn’t tried it with dnf until I had a Rocky 8 box wedge during a dnf upgrade yesterday and wipe out large pieces of the system, then cause some damage to the (annoying default XFS on LVM) root when a reboot failed. It seems to have worked.

Posted on 2023-06-01 by pappp | Leave a comment

My old ass is having the hardest time with the Linux 6.2 series, we were looking at 2.6.x from 2004-2011 (and then for years after on ancient Debian Stable and RHEL-like systems that remained in production forever; I think I only excised the last CentOS6 box among the systems I deal with this year).

Every time I see a question online or a uname or whatnot I have a second of “WHAT YEAR IS I… oh.”

Posted on 2023-03-23 by pappp | Leave a comment

Most Overpriced Marchintosh

Posted on 2023-03-18 by pappp


Since I recently got my HP Apollo 9000 Series 735 up and running, and it’s March, I decided to have a little Marchintosh fun and load MAE (the Macintosh Application Environment, a real officially-licensed Apple product) on to it this evening. As you can see from the photo (because I don’t have a device that can capture the video this thing outputs, and haven’t figured out screenshots under HP-UX 10.20), it works.

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HP Apollo 9000/735: Function Achieved

Posted on 2023-03-11 by pappp
Bad light because that VESA arm mounted monitor is the only one I own that will sync to this thing

Over a year ago I started working on an inert HP Apollo 9000/735 a friend gave me from their collection to avoid moving it cross-country. I’ve recently got it working, and am posting notes about the fun.

At the end of my first post about it, I had recapped the power supply, but had not found a monitor that would talk to the enormousCRX-24z video board with its 1280×1024@72Hz Sync-on-Green via 3x BNC output, or verified the condition of the discs.
As you can see from the splash image, all of those things have been remedied.

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